UHS MDCAT Past Paper 2019

Created by Ali Durrani

UHS MDCAT 2019 Past Paper

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1 / 201

If sequence in DNA is CCCTAGAG, then what would be the sequence in messenger RNA after transcription ?

UHS 2019
Biology
Chromosomes and DNA
Translation
Elimination Tool:

A) GGGAUCUC

B) GGGATCTC

C) GGAAUCUC

D) GGGGTCTC

2 / 201

Taxonomy includes the arrangement of organisms into different taxa. Which of the following represents the correct hierarchy of various taxa of classification?

UHS 2019
Biology
Bio-diversity | Variety of Life
Elimination Tool:

A) Species, genus, family, order, class, phylum

B) Order, family, class, phylum, kingdom

C) Species, genus, family, class, order, phylum

D) Species, genus, order, family, class, phylum

3 / 201

The phase of mitosis in which sister chromatids move towards opposite poles:

UHS 2019
Biology
Cell Cycle
Mitosis
Elimination Tool:

A) Anaphase

B) Metaphase

C) Prophase

D) Telophase

4 / 201

In which situation are genes, are not assorted independently, during meiosis in a chromosome?

UHS 2019
Biology
Chromosomes and DNA
Genetics
Elimination Tool:

A) When genes are linked and their loci are close to each other

B) When some genes have mutated on the chromosome

C) When there are too many Genes on a chromosome

D) When genes are not linked and their loci are far apart

5 / 201

The protein coat of virus is called:

UHS 2019
Biology
Bio-diversity | Variety of Life
Elimination Tool:

A) Capsid

B) Cosmid

C) Capsomere

D) Chromophore

6 / 201

If stimulation is above ______, impulses travel to the brain along the sensory neuron.

UHS 2019
Biology
Coordination and Control
Steps Involved in Nervous Coordination
Elimination Tool:

A) Refractory period

B) Resting potential

C) Action potential

D) Threshold potential

7 / 201

How many molecules of ATP would be utilized for phosphorylation of one glucose molecule during glycolysis?

UHS 2019
Biology
Bioenergetics
Respiration Mechanism – Glycolysis to Electron Transport Chain
Elimination Tool:

A) Three

B) Two

C) Four

D) One

8 / 201

Change in frequency of alleles that occurs by chance Is called as:

UHS 2019
Biology
Evolution
Elimination Tool:

A) Genetic drift

B) Mutation

C) Migration

D) Natural selection

9 / 201

If water has a high latent heat of vaporization, how could this property of water be helpful to plants and animals?

UHS 2019
Biology
Biological Molecules
Water
Elimination Tool:

A) With the release of large amount of water, a small amount of heat loss can take place.

B) With the release of small amount of water vapours, a great amount of heat loss can take place.

C) It will keep their temperature very high.

D) No cooling effect, with the release of even a large amount of water vapours.

10 / 201

The photosynthetic pigments of plants are arranged as clusters in thylakoid membranes. The reaction centers of these clusters consist of _____ molecules.

UHS 2019
Biology
Bioenergetics
Light Dependent Mechanism of Photosynthesis
Elimination Tool:

A) Chlorophyll

B) ATP

C) Carotenoids

D) Glucose

11 / 201

During the G2 phase:

UHS 2019
Biology
Cell Cycle
Introduction to the Cell Cycle
Elimination Tool:

A) Chromosome number is duplicated

B) The chromosomes are left with only one chromatid

C) Energy is stored for Chromosome movement and mitotic specific proteins(Tubulin) are produced

D) Specific enzymes are synthesized and DNA base units are accumulated

12 / 201

DNA polymerase enzyme for PCR is isolated from bacteria, Thermus aquaticus, because;

UHS 2019
Biology
Biotechnology
Variation and Genetics
Elimination Tool:

A) It can work at high speed.

B) It can withstand high denaturation temperature.

C) It can withstand low denaturation temperature.

D) It can be used again and again.

13 / 201

The process in which a complementary copy of the code from a gene is produced by RNA Polymerase in the nucleus:

UHS 2019
Biology
Chromosomes and DNA
DNA Replication
Elimination Tool:

A) Transcription

B) Translation

C) Proofreading

D) DNA Replication

14 / 201

If a carrier haemophilic female (XHXh) is married to a haemophilic male (XhY). What will be the ratio of presence of haemophilia in the children.

Select best answer from the given options.

UHS 2019
Biology
Variation and Genetics
Inherited Diseases
Elimination Tool:

A) 100% all females and males will be haemophilic

B) Females have 50% chances of getting haemophilia and males will be 100% haemophilic

C) Carrier female 25%, haemophilic female 25%, normal male 25% and 25% haemophilic male

D) Females and males both have 50% chances of getting haemophilia

15 / 201

If 15 um size object is observed under light microscope, using 5X eyepiece and 10X objective, its magnified image size will be:

UHS 2019
Biology
Cell Structure and Function
Techniques used in Cell Biology
Elimination Tool:

A) 750 um

B) 50 um

C) 500 um

D) 250 um

16 / 201

In glycine, R is __________.

UHS 2019
Biology
Biological Molecules
Proteins
Elimination Tool:

A) Ethane

B) Fatty acid

C) H atom

D) Competitive reversible

17 / 201

Which enzyme is administered to the patients of Severe Combined Immunodeficiency Disease (SCID)?

UHS 2019
Biology
Bio-diversity | Variety of Life
Elimination Tool:

A) Adenosine Deaminase (ADA)

B) Pancreatic Enzyme

C) ß galactosidase

D) ß lactamase

18 / 201

During the G2 phase:

UHS 2019
Biology
Cell Cycle
Introduction to the Cell Cycle
Elimination Tool:

A) Chromosome number is duplicated

B) The chromosomes are left with only one chromatid

C) Energy is stored for Chromosome movement and mitotic specific proteins(Tubulin) are produced

D) Specific enzymes are synthesized and DNA base units are accumulated

19 / 201

In chemiosmosis, the proton (H+) moves from _______.

UHS 2019
Biology
Bioenergetics
Light Dependent Mechanism of Photosynthesis
Elimination Tool:

A) Stroma to Lumen

B) Cytoplasm to Stroma

C) Lumen to Stroma

D) Stroma to cytoplasm

20 / 201

Which of the following blood vessels contain semilunar valves?

UHS 2019
Biology
Transport
Elimination Tool:

A) Arteries

B) Capillaries

C) Veins

D) Arterioles

21 / 201

During inspiration, the space inside the chest cavity is increased due to:

UHS 2019
Biology
Gaseous Exchange
Respiratory System of Man
Elimination Tool:

A) The relaxation of the muscles of the diaphragm

B) Relaxation of the external intercostal muscles

C) Increased pressure

D) The contraction of the muscles of the diaphragm

22 / 201

The function of calcium ions in muscle contraction is to:

UHS 2019
Biology
Support and Movement
Ultrastructure & Mechanism of Skeletal Muscle Contraction
Elimination Tool:

A) polarize visible light

B) Aid in the transmission of nerve impulse

C) Bind to troponin molecule and cause them to move

D) Bind to tropomyosin molecule and cause them to form cross bridges

23 / 201

Thin filaments of muscles contain _____ chains of actin molecules.

UHS 2019
Biology
Support and Movement
Ultrastructure & Mechanism of Skeletal Muscle Contraction
Elimination Tool:

A) Two

B) One

C) Three

D) Four

24 / 201

Which one is an example of a Nucleotide?

UHS 2019
Biology
Chromosomes and DNA
The Chemical Nature of DNA
Elimination Tool:

A) Adenosine

B) NAD

C) ATP

D) Guanine

25 / 201

Which of the following photosystems is involved in cyclic photophosphorylation?

UHS 2019
Biology
Bioenergetics
Light Dependent Mechanism of Photosynthesis
Elimination Tool:

A) PS II

B) PS I

C) PS I and PS II

D) PS III

26 / 201

Water and Minerals move down their concentration gradient through plasmodesmata to cells of cortex, endodermis, pericycle, and then to sap in the xylem cells. This is also known as the;

UHS 2019
Biology
Transport
Elimination Tool:

A) Vacuolar pathway

B) Apoplastic pathway

C) Symplastic Pathway

D) Mineral absorption Pathway

27 / 201

The major function of basophils is to:

UHS 2019
Biology
Transport
Elimination Tool:

A) Destroy small particles by phagocytosis

B) Release heparin to prevent blood clotting

C) Transport oxygen

D) Inactivate inflammation producing substances

28 / 201

Which cell organelle is responsible for protein modification?

UHS 2019
Biology
Cell Structure and Function
Cytoplasm and Organelles
Elimination Tool:

A) Chloroplast

B) Golgi body

C) Ribosome

D) Mitochondrion

29 / 201

The structure of a fibrous protein comprises of polypeptide chains in the form of:

UHS 2019
Biology
Biological Molecules
Proteins
Elimination Tool:

A) Cluster

B) Spherical or curried up ball

C) Long strands or fibrils

D) Flat uncoiled chains

30 / 201

The nitrogen-containing bases in nucleotide are of two types; Purines and Pyrimidines. The purines bases are:

UHS 2019
Biology
Chromosomes and DNA
The Chemical Nature of DNA
Elimination Tool:

A) Adenine, Guanine, and Cytosine

B) Guanine and Cytosine

C) Adenine and Guanine

D) Adenine and Thymine

31 / 201

Xerophytes have small thick leaves to;

UHS 2019
Biology
Gaseous Exchange
Gaseous Exchange in Plants
Elimination Tool:

A) Help them float on water

B) Limit water loss, by increasing the surface area

C) Help them survive in salty environment

D) Limit water loss, by reducing the surface area

32 / 201

Which hormonal pair would maintain the endometrium and make it receptive for implantation of embryo?

UHS 2019
Biology
Reproduction
Reproduction in Females
Elimination Tool:

A) Luteinising Hormone and Progesterone

B) Estrogen and Progesterone

C) Estrogen and Follicle Stimulating Hormone

D) Luteinising Hormone and Follicle Stimulating Hormone

33 / 201

Complementary DNA molecule is:

UHS 2019
Biology
Chromosomes and DNA
DNA Replication
Elimination Tool:

A) DNA from mRNA

B) an artificial DNA

C) single stranded DNA

D) a small segment Of chromosomal DNA

34 / 201

In genetics, the term locus refers to the ______ of the gene on the chromosome.

UHS 2019
Biology
Chromosomes and DNA
Genetics
Elimination Tool:

A) Position

B) Frequency

C) Copy

D) Inversion

35 / 201

Among the following, which cellular organelle contains circular DNA, similar to those found in bacteria?

UHS 2019
Biology
Cell Structure and Function
Cytoplasm and Organelles
Elimination Tool:

A) Lysosome

B) Nucleus

C) Nucleosome

D) Mitochondria

36 / 201

Site of mRNA translation

UHS 2019
Biology
Cell Structure and Function
Cytoplasm and Organelles
Elimination Tool:

A) Lysosomes

B) Ribosomes

C) Cisternae

D) Golgi body

37 / 201

Now-a-days every newborn gets regular shots of vaccine for polio. It contains _________ for polio to make a child immune against this disease.

UHS 2019
Biology
Bio-diversity | Variety of Life
Elimination Tool:

A) Antibiotics

B) Antibodies

C) Antigens

D) Antisera

38 / 201

Ester linkages occur in:

UHS 2019
Biology
Biological Molecules
Nucleic Acids
Elimination Tool:

A) Nucleic acids

B) Nucleus

C) Carbohydrates

D) Proteins

39 / 201

The covalent bond or bridge between two monosaccharides to form a disaccharide is called a:

UHS 2019
Biology
Biological Molecules
Carbohydrates
Elimination Tool:

A) Hydroxyl bond

B) Hydrogen bond

C) Carboxyl bond

D) Glycosidic bond

40 / 201

Microtubule subunits (for spindle fibers) are synthesized in _______ phase.

UHS 2019
Biology
Cell Cycle
Introduction to the Cell Cycle
Elimination Tool:

A) G1

B) M

C) G2

D) S

41 / 201

Blood group AB is an example of __________ .

UHS 2019
Biology
Variation and Genetics
Blood Group System
Elimination Tool:

A) Complete dominance

B) Recessive alleles

C) Co-dominance

D) Incomplete dominance

42 / 201

During spermatogenesis, the __________, which are haploid cells eventually mature into spermatozoa/mature sperms:

UHS 2019
Biology
Reproduction
Reproduction in Males
Elimination Tool:

A) Spermatogonia

B) Primary spermatocytes

C) Spermatids

D) Secondary spermatocytes

43 / 201

Which is an example of a Disaccharide?

UHS 2019
Biology
Biological Molecules
Carbohydrates
Elimination Tool:

A) Starch

B) Lactose

C) Fructose

D) Glycogen

44 / 201

Homozygous means:

UHS 2019
Biology
Variation and Genetics
Mendelian Inheritance
Elimination Tool:

A) alleles in an organism

B) two different alleles of a gene.

C) having two identical genes

D) having two identical alleles of a gene.

45 / 201

The prokaryotes possess ribosome with larger subunit of:

UHS 2019
Biology
Cell Structure and Function
Prokaryotic and Eukaryotic Cells
Elimination Tool:

A) 70S

B) 50S

C) 60S

D) 40S

46 / 201

Lipids contain double amount of energy as compared to the same amount of carbohydrates due to the presence of:

UHS 2019
Biology
Biological Molecules
Lipids
Elimination Tool:

A) Higher proportion of C-H

B) Higher proportion of C-O

C) Higher proportion of Oxygen

D) Low proportion of C-H bonds

47 / 201

The type of energy, reduced by the enzymes, for biological reactions to occur is called the:

UHS 2019
Biology
Enzymes
Elimination Tool:

A) Light Energy

B) Heat energy

C) Active energy

D) Activation energy

48 / 201

In plants, which sugar is transported from source to sink through sieve tubes?

UHS 2019
Biology
Elimination Tool:

A) Glucose

B) Sucrose

C) Fructose

D) None of the above

49 / 201

Which of the following hormone stimulates the ovulation from the follicle into oviduct?

UHS 2019
Biology
Reproduction
Elimination Tool:

A) Estrogen

B) Progesterone

C) Luteinizing hormone

D) Follicle stimulating hormone

50 / 201

Sequence of amino acids, in a polypeptide chain of protein molecule, corresponds to the sequence of nucleotides on mRNA for that protein. If the reading frame of mRNA for a human protein is 993 nucleotides, including a stop codon at the end, how many amino acids would be incorporated in the polypeptide chain?

UHS 2019
Biology
Chromosomes and DNA
Genetics
Elimination Tool:

A) 93

B) 330

C) 331

D) 993

51 / 201

According to the theory of natural selection, organisms produce:

UHS 2019
Biology
Evolution
Elimination Tool:

A) Offspring according to the resources available

B) Offspring to create resources

C) To create resources

D) More offspring than supported

52 / 201

An example of competitive inhibition of an enzyme is the inhibition of;

UHS 2019
Biology
Enzymes
Elimination Tool:

A) Succinic dehydrogenase by malonic acid

B) Cytochrome oxidase by cyanide

C) Hexokinase by glucose

D) Carbonic anhydrase by carbon dioxide

53 / 201

Most proteins are made up of:

UHS 2019
Biology
Biological Molecules
Proteins
Elimination Tool:

A) 10 types of Amino acids

B) 20 types of Amino acids

C) 170 types Of Amino acids

D) 16 types of Amino acids

54 / 201

Starch is present in tubers, fruits, and grains but absent in animal cells. Instead, animals have a substance stored in liver and muscles known as:

UHS 2019
Biology
Biological Molecules
Carbohydrates
Elimination Tool:

A) Galactose

B) Glucagon

C) Glycogen

D) Glucose

55 / 201

Given below, is the diagram of a nephron without a vascular supply.

What is the name of Part C?

UHS 2019
Biology
Homeostasis
Structure and Importance of the Kidney
Elimination Tool:

A) Collecting tubule

B) Proximal tubule

C) Distal tubule

D) Loop of Henle

56 / 201

The finger like infoldings, which are formed by inner membrane of mitochondria, are called:

UHS 2019
Biology
Cell Structure and Function
Cytoplasm and Organelles
Elimination Tool:

A) Ribosomes

B) Matrix

C) Porin

D) Cristae

57 / 201

The route of urine excretion from kidney to outside of body is:

UHS 2019
Biology
Homeostasis
Structure and Importance of the Kidney
Elimination Tool:

A) Kidney -> ureter -> urinary bladder -> urethra

B) Urinary bladder -> kidney -> ureter -> urethra

C) Kidney -> urethra -> urinary bladder -> ureter

D) Kidney -> ureter -> urethra -> urinary bladder

58 / 201

Meselson and Stahl transferred few bacteria grown in N15 medium to N14 medium for replicating their DNA. What would be the result after two rounds of replication?

UHS 2019
Biology
Chromosomes and DNA
DNA Replication
Elimination Tool:

A) 100% heavy duplex

B) 100% hybrid duplex

C) 50% hybrid duplex and 50% heavy duplex

D) 50% hybrid duplex and 50% light duplex

59 / 201

A student of chemical engineering mistakenly engulfed the toxic compound “A” which was a potent inhibitor of a certain enzyme. He was immediately brought to a hospital where the doctor injected, intravenously, substrate “B” to minimize the toxic effect of Compound A. His life was saved from serious damage. The treatment method shows that compound A was a ______ inhibitor.

UHS 2019
Biology
Enzymes
Elimination Tool:

A) Non competitive

B) Irreversible

C) Temperature sensitive

D) Competitive reversible

60 / 201

Passive processes for the movement of molecules across cell surface membrane are:

UHS 2019
Biology
Transport
Elimination Tool:

A) osmosis and phagocytosis

B) pinocytosis and facilitated diffusion

C) facilitated diffusion and osmosis

D) diffusion and exocytosis

61 / 201

The main nitrogenous excretory product of humans is:

UHS 2019
Biology
Homeostasis
Excretion in Animals
Elimination Tool:

A) Ammonia

B) Urea

C) Ammonium

D) Uric acid

62 / 201

Glycolysis takes place in the ______ of cells.

UHS 2019
Biology
Bioenergetics
Respiration Mechanism – Glycolysis to Electron Transport Chain
Elimination Tool:

A) Nucleus

B) Mitochondria

C) Golgi complex

D) Cytoplasm

63 / 201

The following flowchart depicts the steps of the Calvin Cycle. Which option, according to you, fits in as the correct answer of the missing step?

UHS 2019
Biology
Bioenergetics
Light Independent Mechanism of Photosynthesis
Elimination Tool:

A) Pyruvate

B) Hydrogenase

C) Ribulose bisphosphate

D) Oxaloacetate

64 / 201

In an action potential, the permeability of sodium ions in the neurons increases due to;

UHS 2019
Biology
Coordination and Control
Steps Involved in Nervous Coordination
Elimination Tool:

A) Repolarization

B) Sodium ions forming an ionic bonding

C) The opening of sodium channels/gates

D) The action of the acetylcholinesterase enzyme

65 / 201

The thick filaments, in a myofibril of muscles, are made of ________.

UHS 2019
Biology
Support and Movement
Ultrastructure & Mechanism of Skeletal Muscle Contraction
Elimination Tool:

A) Myoglobin

B) Myosin

C) Actin

D) Haemoglobin

66 / 201

Given figures shows:

UHS 2019
Biology
Gaseous Exchange
Gaseous Exchange in Plants
Elimination Tool:

A) Structure of Lenticel

B) Hydathode showing gaseous vapour exchange

C) Fungus reproducing by spore formation

D) Algae reproducing by spore formation

67 / 201

Substances responsible for increasing the set point of the hypothalamus are called:

UHS 2019
Biology
Coordination and Control
Coordination in Animals
Elimination Tool:

A) Androgens

B) Pathogens

C) Pepsin

D) Prions

68 / 201

The Plasmid pBR322 has antibiotic resistance genes for:

UHS 2019
Biology
Biotechnology
Gene Therapy
Elimination Tool:

A) Streptomycin

B) Ampicillin and Tetracycline

C) Tetracycline and mxycycline

D) Ampicillin

69 / 201

The main neurotransmitter for synapses is ______, which lie outside the central nervous system.

UHS 2019
Biology
Coordination and Control
Peripheral Nervous System
Elimination Tool:

A) Acetylcholine

B) Acetaldehyde

C) Choline

D) Phosphatidylcholine

70 / 201

The structure present in a eukaryotic cell but absent in prokaryotic cells is;

UHS 2019
Biology
Cell Structure and Function
Prokaryotic and Eukaryotic Cells
Elimination Tool:

A) DNA

B) Ribosomes

C) Cell surface membrane

D) Nucleus

71 / 201

The reflex action is the phenomena which only involves:

UHS 2019
Biology
Coordination and Control
Steps Involved in Nervous Coordination
Elimination Tool:

A) receptors and effectors

B) receptors, effectors, and spinal cord

C) brain, receptors, and spinal cord

D) receptors, neurons, and the brain

72 / 201

Acetylcholine and Noradrenaline are two types of ______ used in our nervous system:

UHS 2019
Biology
Coordination and Control
Coordination in Animals
Elimination Tool:

A) Enzymes

B) Channel and carrier proteins in the cell membrane of a neuron.

C) Neurotransmitters

D) Hormones

73 / 201

A disease caused by gradual breakdown of the thin walls of alveoli is;

UHS 2019
Biology
Gaseous Exchange
Respiratory Disorders
Elimination Tool:

A) Tuberculosis

B) Asthma

C) Emphysema

D) Bronchitis

74 / 201

A person got an infection, he became ill but then he survived. What do you think which of immunity he would have developed?

UHS 2019
Biology
Transport
Elimination Tool:

A) Active immunity

B) Artificially induced active immunity

C) Passive immunity

D) Naturally induced active immunity

75 / 201

Four plants are present in different environmental conditions. Plant A is present in a warm climate with continuous rainfall, plant B is present in a cool forest, plant C is present in a warm climate with little breeze, while plant D is present in a warm climate with high wind speed. Which one of the above plants will have the highest rate of transpiration?

UHS 2019
Biology
Gaseous Exchange
Gaseous Exchange in Plants
Elimination Tool:

A) Plant B

B) Plant D

C) Plant A

D) Plant C

76 / 201

Smooth endoplasmic reticulum is responsible for the metabolism of:

UHS 2019
Biology
Cell Structure and Function
Cytoplasm and Organelles
Elimination Tool:

A) Nucleic acids

B) Proteins

C) Carbohydrates

D) Lipids

77 / 201

As a result of replication, parental DNA would become completely dispersed and that each strand of all the daughter molecules would be a mixture of old and new DNA. This is called as:

UHS 2019
Biology
Chromosomes and DNA
DNA Replication
Elimination Tool:

A) Dispersive idea

B) Conservative idea

C) Disruptive idea

D) Semi-conservative idea

78 / 201

Inside ovary, primary oocyte divides through first meiotic division, forming two haploid cells, the secondary oocyte and:

UHS 2019
Biology
Reproduction
Reproduction in Females
Elimination Tool:

A) Ovum

B) Oogonium

C) Follicle cell

D) Polar body

79 / 201

Among followings, ______ enzyme is naturally found in human immunodeficiency virus (HIV).

UHS 2019
Biology
Bio-diversity | Variety of Life
Elimination Tool:

A) Ligase

B) Reverse Transcriptase

C) RNA Polymerase

D) DNA Polymerase

80 / 201

A person was married to his cousin and both are heterozygous for Sickle Cell anemia. Among their four kids, what will be proportion of homozygotes?

UHS 2019
Biology
Variation and Genetics
Inherited Diseases
Elimination Tool:

A) 75%

B) 50%

C) 100%

D) 25%

81 / 201

Genetic engineering has been successfully used for producing;

UHS 2019
Biology
Biotechnology
Genetic Engineering & its tools
Elimination Tool:

A) Animals, with inferior traits.

B) Transgenic mice for testing safety of polio vaccine before use in humans

C) Animals, that have the same genetic constitution.

D) None of the above

82 / 201

What is the quark composition of a Proton?

UHS 2019
Physics
Nuclear Physics
Composition of Atomic Nuclei
Elimination Tool:

A) Two up quarks and one down quark

B) Two up quarks and one strange quark

C) One up quark and two strange quarks

D) Two down quarks and one up quark

83 / 201

In simple harmonic motion, acceleration will be maximum, when object is at:

UHS 2019
Physics
Oscillations and Simple Harmonic Motion
Simple Harmonic Motion and Uniform Circular Motion
Elimination Tool:

A) Maximum displacement from the mean position

B) Center position

C) Half of the maximum displacement from mean position

D) Mean position

84 / 201

For projectile motion, in the absence of air resistance:

UHS 2019
Physics
Motion in Two Dimensions
Projectile motion
Elimination Tool:

A) Horizontal acceleration is zero

B) Vertical acceleration is zero

C) Horizontal force is constant

D) Vertical speed is constant

85 / 201

An alternation voltage V (in volts) is represented by the equation:
V = 300 sin (100πt)
What is the value of “f” for this voltage?

UHS 2019
Physics
Alternating Current
Alternating Voltage and Current
Elimination Tool:

A) 100 Hz

B) 50 Hz

C) 25 H

D) 200 Hz

86 / 201

If a conductor of length 7m is placed in a magnetic field of strength 0.3 T carrying current 1 A, parallel to the field. What will be the force, acting on it, due to this magnetic field?

UHS 2019
Physics
Magnetism and Electromagnetic Induction
Force on a Current Carrying Conductor in a Uniform Magnetic Field
Elimination Tool:

A) 7 N

B) 0 N

C) 3.1 N

D) 2.1 N

87 / 201

The direction of current through the load resistance of a full-wave rectification circuit:

UHS 2019
Physics
Alternating Current
A.C. Circuits
Elimination Tool:

A) remains constant

B) inverts for positive cycle

C) changes for every cycle

D) inverts for negative cycle

88 / 201

A wire has a spring constant of 5 x 104 N m-1. It is stretched by a force to extension of 1.4 mm. Calculate the strain energy stored in the wire.

UHS 2019
Physics
Oscillations and Simple Harmonic Motion
Horizontal Mass Spring System
Elimination Tool:

A) 4.9 x 10-5 J

B) 4.9 x 10-2 J

C) 4.9 J

D) 4.9 x 10-3 J

89 / 201

Electric field strength of a point charge is E and electric potential is V, at a distance ‘r’ from the point charge. What is the electric potential at a point for the same point charge where electric field strength is E/4?

UHS 2019
Physics
Electrostatics
Elimination Tool:

A) 4V

B) 2V

C) V/2

D) V/4

90 / 201

In Double Slit experiment, the fringe spacing of the diffracted rays increases when:

UHS 2019
Physics
Optics, Nature of Light and Optical Instruments
Elimination Tool:

A) the wavelength of the diffracted rays increases

B) the distance between the slits increases

C) the distance from mid points of the slits to the central of the fringe on the screen increases

D) the distance between the screen and the slits decreases

91 / 201

Work done, due to centripetal force, for circular motion will be:

UHS 2019
Physics
Circular Motion and Momentum
Circular Motion & Momentum
Centripetal Force
Elimination Tool:

A) Reduced

B) Zero

C) Maximum

D) Half

92 / 201

Calculate the rate at which energy is transferred by 220 V mains supply, which provides a current of 0.1 A to a LED?

UHS 2019
Physics
Current Electricity
Electric Current
Elimination Tool:

A) 2.2 W

B) 2.2 kW

C) 22 kW

D) 22 W

93 / 201

In relation, which quantity is represented by λ?

UHS 2019
Physics
Nuclear Physics
Radioactivity
Elimination Tool:

A) Decay constant

B) Half life

C) Activity

D) Wavelength

94 / 201

The value and units of the Planck constant ‘h’ can be expressed as:

UHS 2019
Physics
Dawn of Modern Physics
Elimination Tool:

A) 3.63 x 10-34 Js

B) 6.63 x 10-34 Js-1

C) 6.63 x 10-34 Js

D) 6.63 x 10-43 Js

95 / 201

A copper wire has length L and cross-sectional area A. Its resistance is R. If we halved the length and halved the diameter of wire, then what will be the resistance of this wire?

UHS 2019
Physics
Current Electricity
Wire Wound Variable Resistors
Elimination Tool:

A) 4R

B) 3R

C) 2R

D) R

96 / 201

A particle, carrying a charge of 5e, falls through a potential difference of 25 V. What would be energy acquired by the particle in ‘J’.

UHS 2019
Physics
Work, Power & Energy
Power and Energy
Elimination Tool:

A) 1.6 x 10-19J

B) 125 J

C) 125 x 10-19 J

D) 125 x 1.6 x 10-19 J

97 / 201

Electric field strength at a point between oppositely charged plates is ‘E’. If the distance between plates is reduced to half, what will be the new value of electric intensity?

UHS 2019
Physics
Electrostatics
Elimination Tool:

A) 4E

B) E/2

C) E/4

D) 2E

98 / 201

When the length of simple pendulum is doubled, the ratio of its new time period to old time period is:

UHS 2019
Physics
Oscillations and Simple Harmonic Motion
Simple Pendulum
Elimination Tool:

A) 3√2

B) 1√2

C) 2√2

D) √2

99 / 201

If we change the magnetic flux linking a coil by rotating the coil in a constant magnetic field, the rate of change of this flux is:

UHS 2019
Physics
Magnetism and Electromagnetic Induction
Induced EMF and Induced Current
Elimination Tool:

A) Proportional to the emf produced in it

B) Proportional to the material Of the coil

C) Proportional to the resistance of the coil

D) Proportional to the change in magnetic field

100 / 201

Minimum energy required to eject an electron from metal surface is called:

UHS 2019
Physics
Dawn of Modern Physics
Elimination Tool:

A) Stopping potential

B) Electromotive force

C) Work function

D) Threshold frequency

101 / 201

Heavy nucleus of atoms go through fission so that they can:

UHS 2019
Physics
Nuclear Physics
Nuclear Reactions
Elimination Tool:

A) absorb low amount of energy

B) absorb high amount of energy

C) reduce their binding energy nucleon

D) increase their binding energy per nucleon

102 / 201

The area under the extension-load graph Of an elastic material whose elastic limit has not been exceeded gives its:

UHS 2019
Physics
Work, Power & Energy
Elimination Tool:

A) Stress

B) Strain energy

C) Strain

D) Young modulus

103 / 201

What will be the expression for the observed frequency, if the source is moving towards the observer?

UHS 2019
Physics
Wave Motion and Sound
Elimination Tool:

A) Option A

B) Option B

C) Option C

D) Option D

104 / 201

Path difference for the destructive interference can be written as:

UHS 2019
Physics
Wave Motion and Sound
Elimination Tool:

A) Option A

B) Option B

C) Option C

D) Option D

105 / 201

The horizontal component of Earth magnetic flux density is 1.8 x 10-6 T. The current in a horizontal cable is 160 A. Calculate the maximum force per unit length?

UHS 2019
Physics
Magnetism and Electromagnetic Induction
Force on a Current Carrying Conductor in a Uniform Magnetic Field
Elimination Tool:

A) 2.88x 10-6N/m

B) 2.88x 10-4N/m

C) 2.88x 10-2N/m

D) 2.88x 10-8N/m

106 / 201

Kirchhoff’s first law/rule corresponds to:

UHS 2019
Physics
Current Electricity
Kirchoff’s Law
Elimination Tool:

A) Law of conservation of energy

B) Law Of conservation Of momentum

C) Law of conservation of charge

D) Law of conservation of mass

107 / 201

Percentage uncertainty in length and width of a rectangle is 2% and 3%. The total uncertainty in the area of that rectangle is?

UHS 2019
Physics
Measurements
Assessment of Total Uncertainty
Elimination Tool:

A) 1.5%

B) 5%

C) 1%

D) 6%

108 / 201

An object is moving along a circular path of radius 4m. What will be its angular displacement if it moves 14 m on this circular path?

UHS 2019
Physics
Circular Motion and Momentum
Circular Motion & Momentum
Angular Displacement, Velocity and Acceleration
Elimination Tool:

A) 5.0 radians

B) 3.5 radians

C) 4.5 radians

D) 5.5 radians

109 / 201

If we give a direct current to the transformer’s primary coil, then there will be:

UHS 2019
Physics
Magnetism and Electromagnetic Induction
Transformers
Elimination Tool:

A) No emf produced in the secondary

B) More emf in the secondary

C) Equal emf produced in the secondary

D) Less emf produced in the secondary

110 / 201

Light, emitted by a single source, passes through 2 narrow slits 1.00mm apart. The interference pattern is observed on a screen 200 cm away and the separation between the centers of adjacent bright fringes is 2.00mm. What would be the wavelength of the light?

(u= micro)

UHS 2019
Physics
Wave Motion and Sound
Optics, Nature of Light and Optical Instruments
Elimination Tool:

A) 2 pm

B) 1 um

C) 2 um

D) 1 nm

111 / 201

The unit of magnetic flux density is the tesla, ‘T’. It can also be expressed as:

UHS 2019
Physics
Magnetism and Electromagnetic Induction
Magnetic Flux and Flux Density
Elimination Tool:

A) Option A

B) Option B

C) Option C

D) Option D

112 / 201

Molecules Of a gas at constant pressure for a fixed amount of gas have average kinetic energy X. Increasing temperature from 27 C to 327C, average K.E. of molecules will become:

UHS 2019
Physics
Heat and Thermodynamics
Kinetic Theory of Gases
Elimination Tool:

A) 20X

B) 300X

C) 200X

D) 2X

113 / 201

The sum of all forms of molecular energies (Kinetic and Potential) of a substance is termed as?

UHS 2019
Physics
Work, Power and Energy
Power and Energy
Elimination Tool:

A) Elastic energy

B) Absolute energy

C) Internal energy

D) Heat energy

114 / 201

A negligible small current between input terminals of the operational amplifier is because of:

UHS 2019
Physics
Electronics
Op-Amps
Elimination Tool:

A) High output resistance

B) Low output resistance

C) High input resistance

D) Low input resistance

115 / 201

The diameter of a wire is measured by using a micrometer screw gauge with least count of 0.01 mm. Which of the following readings will be correct?

UHS 2019
Physics
Measurements
Significant Figures
Elimination Tool:

A) 0.20 cm

B) 0.002 m

C) 2.00 mm

D) 0.2 cm

116 / 201

Calculate the energy of a photon, with a frequency of 3.0 x 1018 Hz.
(h = 6.63 x 10-34)

UHS 2019
Physics
Dawn of Modern Physics
Elimination Tool:

A) 19.89 x 10-16 J

B) 11.89 x 10-16 J

C) 1.89 x 10-16 J

D) 19.89 x 10-18 J

117 / 201

The parents were stunned when they saw that children had created complete _____ in the bedroom.

UHS 2019
English
Fill in the blank
Elimination Tool:

A) Knack

B) Groggy

C) Dank

D) Mayhem

118 / 201

The prince abdicated the crown and returned to his castle. Abdicated means;

UHS 2019
English
Key Vocabulary
Elimination Tool:

A) Gave up

B) Sold

C) Reinvested into

D) Auctioned

119 / 201

SPOT THE ERROR:

In the following sentence, some segments of the sentence are underlined. Your task is to identify that underlined segment of the sentence, which contains the mistake that needs to be corrected.

UHS 2019
English
Identify errors in sentence
Elimination Tool:

A) Option A

B) Option B

C) Option C

D) Option D

E) No error

120 / 201

In the following questions, sentences are given with blanks to be filled in with an appropriate word. Four alternatives are suggested for each question. Choose the correct alternative, out of the four as your answer.

Ravens appear to behave ______, actively helping one another to find food.

UHS 2019
English
Grammar and Punctuation
Fill in the blank
Elimination Tool:

A) mysteriously

B) warily

C) aggressively

D) defensively

121 / 201

In the following question, four alternative sentences are given. Choose the CORRECT option.

UHS 2019
English
Grammar and Punctuation
Elimination Tool:

A) After breaking the glass, Ruby said "Please don't tell on me".

B) After breaking the glass Ruby said: "Please don't tell on me."

C) After breaking the glass, Ruby said: "Please don't tell on me."

D) After breaking the glass Ruby said: please don't tell on me

122 / 201

SPOT THE ERROR:

In the following sentence, some segments of the sentence are underlined. Your task is to identify that underlined segment of the sentence, which contains the mistake that needs to be corrected.

UHS 2019
English
Identify errors in sentence
Elimination Tool:

A) Option A

B) Option B

C) Option C

D) Option D

123 / 201

She was feeling ______ even after five hours of the surgery.

UHS 2019
English
Fill in the blank
Elimination Tool:

A) Mumbled

B) Haggard

C) Pally

D) Grope

124 / 201

The culpable child _____ some words to her mother for pardoning his delinquency.

UHS 2019
English
Fill in the blank
Elimination Tool:

A) Mumbled

B) Showy

C) Rude

D) Crazy

125 / 201

SPOT THE ERROR:

In the following sentences, some segments of the sentence are underlined. Your task is to identify that underlined segment of the sentence, which contains the mistake that needs to be corrected.

UHS 2019
English
Identify errors in sentence
Elimination Tool:

A) Let's

B) The

C) is

D) to

126 / 201

In the following question, four alternative sentences are given. Choose the CORRECT option.

UHS 2019
English
Grammar and Punctuation
Elimination Tool:

A) It is healthful to eat a variety of food.

B) It Were healthful to eat a variety of food.

C) It is healthful to ate a variety of food.

D) It were healthful to ate a variety of food.

127 / 201

SPOT THE ERROR:

In the following sentence, some segments of the sentence are underlined. Your task is to identify that underlined segment of the sentence, which contains the mistake that needs to be corrected.

UHS 2019
English
Identify errors in sentence
Elimination Tool:

A) Option A

B) Option B

C) Option C

D) Option D

128 / 201

The accident happened due to the driver’s _____ .

UHS 2019
English
Fill in the blank
Elimination Tool:

A) Negligence

B) Reluctance

C) Regret

D) Quotation

129 / 201

The new teacher showed no _____ about hitting the students.

UHS 2019
English
Fill in the blank
Elimination Tool:

A) Quakes

B) Qualms

C) Quarrel

D) Quotation

130 / 201

In the following question, four alternative sentences are given. Choose the CORRECT option.

UHS 2019
English
Grammar and Punctuation
Elimination Tool:

A) He asked, "Is your brother home?"

B) He asked "Is your brother home?"

C) He asked, "is your brother home"?

D) He asked “Is your brother home"

131 / 201

SPOT THE ERROR:

In the following sentence, some segments of the sentence are underlined. Your task is to identify that underlined segment of the sentence, which contains the mistake that needs to be corrected.

UHS 2019
English
Identify errors in sentence
Elimination Tool:

A) Option A

B) Option B

C) Option C

D) Option D

132 / 201

SPOT THE ERROR:

In the following sentence, some segments of the sentence are underlined. Your task is to identify that underlined segment of the sentence, which contains the mistake that needs to be corrected.

UHS 2019
English
Identify errors in sentence
Elimination Tool:

A) Option A

B) Option B

C) Option C

D) Option D

133 / 201

In the following question, four alternative sentences are given. Choose the CORRECT option.

UHS 2019
English
Grammar and Punctuation
Elimination Tool:

A) I was been to America for a medical check up.

B) I had being to America for a medical check up.

C) I have been to America for a medical check up.

D) I has been to America for a medical check up.

134 / 201

They sometimes feel a _____ for the mountains and the sea.

UHS 2019
English
Fill in the blank
Elimination Tool:

A) Yearning

B) Yapping

C) Yelling

D) Yielding

135 / 201

I ______ caution in interpreting these results.

UHS 2019
English
Fill in the blank
Elimination Tool:

A) Urge

B) Usher

C) Usurp

D) Uproot

136 / 201

In the following question, four alternative sentences are given. Choose the CORRECT option.

UHS 2019
English
Grammar and Punctuation
Elimination Tool:

A) We use to play football when we lived abroad.

B) We are used to play football when we lived abroad.

C) We used to play football when we lived abroad.

D) We have use to play football when we lived abroad.

137 / 201

The given diagram shows the enthalpy changes during a chemical reaction.

UHS 2019
Chemistry
Thermochemistry
Standard States and Enthalpy Changes
Elimination Tool:

A) An endothermic reaction

B) An exothermic reaction

C) An isothermic process

D) A non-spontaneous process

138 / 201

Disposable cups are made of a polymer ‘polystyrene’. Polystyrene is:

UHS 2019
Chemistry
Macromolecules
Synthetic Polymers and Biopolymers
Elimination Tool:

A) A polyamide

B) A condensation polymer

C) An addition polymer

D) A polyester

139 / 201

The decomposition of phosphorus pentachloride in the presence of moisture takes place by the following mechanism.

The rate equation for this reaction will be:

UHS 2019
Chemistry
Reaction Kinetics
Rate and velocity of chemical reaction
Elimination Tool:

A) Rate = k [POCl3][H2O]3

B) Rate = k [PCl5][H2O]

C) Rate = k [PCl5][H2O]4

D) Rate = [PCl5][H2O]

140 / 201

Which two elements are isotopes?

UHS 2019
Chemistry
Atomic Structure
Elimination Tool:

A) 16X8 and 16Y8

B) 14X8 and 15Y8

C) 18X9 and 20Y10

D) 12X6 and 12Y7

141 / 201

How many moles of Calcium Carbonate are present in 1.75 kg of Calcium Carbonate (Ar of Ca = 40, Ar of C = 12, Ar of O = 16)

UHS 2019
Chemistry
Stoichiometry
Mole
Elimination Tool:

A) 1.75 mol

B) 1750 mol

C) 0.0175 mol

D) 17.5 mol

142 / 201

The number of moles of water in 1 kg ice are:

UHS 2019
Chemistry
Stoichiometry
Mole
Elimination Tool:

A) 50 moles

B) 100 moles

C) 1000 moles

D) 55.5 moles

143 / 201

Ketones can be made by oxidation of:

UHS 2019
Chemistry
Aldehydes and Ketones
Preparation of Aldehydes And Ketones
Elimination Tool:

A) Aldehydes

B) Primary Alcohols

C) Secondary Alcohols

D) Tertiary Alcohols

144 / 201

In the second period of elements, although oxygen lies next to nitrogen yet its ionization first energy is lower than that of nitrogen because?

UHS 2019
Chemistry
Chemical Bonding
Elimination Tool:

A) Oxygen is paramagnetic in character

B) Nuclear charger of oxygen is greater than nitrogen

C) Oxygen has higher electron affinity

D) In oxygen, there exists repulsion between pair of electrons present in the same orbital of valence shell.

145 / 201

Which of the following reagent is required for preparation of acyl chloride (CH3COCl) from ethanoic aicd?

UHS 2019
Chemistry
Carboxylic Acids and its Derivatives
Elimination Tool:

A) PCl5

B) POCl3

C) CH3Cl

D) HCl

146 / 201

Which enthalpy change is relevant in the following process

Na(s) -> Na (g) ΔH = +107

UHS 2019
Chemistry
Thermochemistry
Standard States and Enthalpy Changes
Elimination Tool:

A) Enthalpy of atomization

B) Enthalpy of fusion

C) Enthalpy of vaporization

D) Enthalpy of formation

147 / 201

Which of the following will give a positive test with Tollen’s reagent?

UHS 2019
Chemistry
Aldehydes and Ketones
Reactivity and Reactions of Carbonyl Group
Elimination Tool:

A) Tertiary alcohols

B) Carboxylic acids

C) Aldehydes

D) Ketones

148 / 201

Which one of the following compounds is an additional polymer?

UHS 2019
Chemistry
Macromolecules
Types of Polymers
Elimination Tool:

A) Polyvinyl chloride

B) Nylon

C) Carbohydrate

D) Polyester

149 / 201

Amino acids are bi-functional compounds, with a general formula NH2CH(R)CO2H. A tripeptide is formed between Alanine (ala), Glycine (gly), and lysine (lys). There is no repetition of amino acid in this tri-peptide; Suggest how many tri-peptides are possible?

UHS 2019
Chemistry
Chemistry of Life
Proteins
Elimination Tool:

A) 9

B) 6

C) 3

D) 12

150 / 201

Which of the following set constitutes of all the molecules and ions of non-planar geometry?

UHS 2019
Chemistry
Chemical Bonding
Elimination Tool:

A) PH4+, NH3, SO3, Benzene

B) CH4, NH4 +, MnO4- , NF3

C) Ethene, H2O, BeCl2, H2S

D) SO2, C2H4, BF3, NO3-

151 / 201

Which of the following element is not present in halogens?

UHS 2019
Chemistry
s and p Block Elements
Introduction to s and p Block Elements
Elimination Tool:

A) I

B) Cl

C) Fe

D) F

152 / 201

Which balanced chemical equation show the formation of ethanoyl chloride using thionyl chloride?

UHS 2019
Chemistry
Alkyl Halides and Amines
Reactivity and Reactions of Alkyl Halides
Elimination Tool:

A) HCOOH + SOCl2 —> HCOCI + SO2 + HCI

B) CH3CH2COOH + 2SOCl -> CH3CH2COCl + SO2 + HCI

C) CH3CH2COOH + 2SOCl -> CH3CH2COC1 + SO3 + HCI

D) CH3COOH + SOCl2 -> CH3COCl + SO2 + HCI

153 / 201

Carboxylic acids can be reduced to corresponding alcohols. Which of the following reagent can be used for this purpose?

UHS 2019
Chemistry
Carboxylic Acids and its Derivatives
Elimination Tool:

A) KMnO4

B) LiAlH4

C) K2Cr2O4

D) H2SO4

154 / 201

The average atomic mass of Boron is 10.8. It has two isotopes of masses 10 and 11 respectively. What is the percentage of isotope with the average mass of 10?

UHS 2019
Chemistry
Stoichiometry
Theoretical Yield, Actual Yield and Percentage Yield
Percentage Correct
Elimination Tool:

A) 20%

B) 60%

C) 80%

D) 50%

155 / 201

Which of the following bond is responsible for joining the amino acids in proteins?

UHS 2019
Chemistry
Chemistry of Life
Proteins
Elimination Tool:

A) Peptide Bond

B) Ionic Bond

C) Metallic Bond

D) Disulfide Bond

156 / 201

Select the reagent X from the following choices for this conversion:

UHS 2019
Chemistry
Aldehydes and Ketones
Reactivity and Reactions of Carbonyl Group
Elimination Tool:

A) Acidified Potassium hydroxide

B) Acidified Potassium dichromate (VI)

C) Acidified Phosphoric acid

D) Acidified Oxalic acid

157 / 201

Modern periodic table is arranged in ascending order of?

UHS 2019
Chemistry
Atomic Structure
Elimination Tool:

A) Nucleon number

B) Atomic mass

C) Proton number

D) Mass number

158 / 201

The wavelength of the electromagnetic wave having frequency of 3 kHz will be?

UHS 2019
Physics
Wave Motion and Sound
Elimination Tool:

A) 120 km

B) 100 km

C) 80 km

D) 140 km

159 / 201

Oxidation number of particular element can be directly or indirectly inferred from its:

UHS 2019
Chemistry
Electrochemistry
Elimination Tool:

A) Group number

B) Atomic size

C) Atomic mass

D) Physical state

160 / 201

Treatment of ethene with cold sulphuric acid, followed by reaction with boiling water, yields:

UHS 2019
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) Ethane

B) Ethanal

C) Ethanol

D) Ethyne

161 / 201

Which of the following substances exhibits hydrogen bonding?

UHS 2019
Chemistry
Chemical Bonding
Elimination Tool:

A) H2S

B) SiH4

C) NH3

D) HI

162 / 201

CFCs are organic compounds, that are derivatives of saturated hydrocarbons. They have high bond dissociation values therefore they are inert and non-toxic for living organisms.

The word CFCs stands for:

UHS 2019
Chemistry
Environmental Chemistry
Elimination Tool:

A) Chlorofluorocarbons

B) Carbonfluorochlorines

C) Clorofluorocarbonos

D) Chlorofluoridecarbons

163 / 201

Nitriles (RCN), on hydrolysis, in the presence of a mineral acid yield:

UHS 2019
Chemistry
Carboxylic Acids and its Derivatives
Elimination Tool:

A) Ethers

B) Carboxylic acids

C) Aldehydes

D) Alcohols

164 / 201

Maleic and Fumaric acid, both have chemical C4H4O4. The structure of these acids is shown below.

UHS 2019
Chemistry
Carboxylic Acids and its Derivatives
Elimination Tool:

A) Cis-Trans isomers

B) Structural isomers

C) Metamers

D) Position Isomers

165 / 201

Ionization energy decreases down the group, from top to bottom, due to:

UHS 2019
Chemistry
Periodicity in Elements
Periodic Trends
Elimination Tool:

A) Increase in atomic mass

B) Increase in shielding effect of the intervening electrons

C) Increase in proton number

D) Decrease in atomic size

166 / 201

Which of the following compounds will give a secondary alcohol after reaction with NaBH4?

UHS 2019
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) CH3COCH3

B) CH3COOCH3

C) CH3CH2CHO

D) CH3CH2COOH

167 / 201

The names of functional groups in the following compound X are:

UHS 2019
Chemistry
Fundamental Principles of Organic Chemistry
Functional Groups
Elimination Tool:

A) Secondary alcohol, nitrile, and phenol ring

B) Secondary alcohol, amine, and benzene ring

C) Secondary alcohol, nitrile, and aryl ring

D) Primary alcohol, nitrile, and benzene ring

168 / 201

Which product is obtained by the hydrolysis of 1-chlorobutane with the aqueous sodium hydroxide?

UHS 2019
Chemistry
Alkyl Halides and Amines
Reactivity and Reactions of Alkyl Halides
Elimination Tool:

A) 1-butanal

B) 1-butanol

C) 1-butene

D) Butanone

169 / 201

If two objects of equal masses ‘m’ are moving towards each other with the same speeds ‘v’ then what will be the total final momentum after elastic head-on collision?

UHS 2019
Physics
Forces and Motion
Elastic and Inelastic Collisions
Elimination Tool:

A) mv kg m/s

B) – mv kg's

C) 2 mv kg's

D) 0 kg m/s

170 / 201

Which of the following compounds is responsible for the depletion of ozone layer?

UHS 2019
Chemistry
Environmental Chemistry
Elimination Tool:

A) Chlorofluorocarbons

B) Carbon tetrachlorie

C) Methane

D) Hydroflorocarbons

171 / 201

All the collisions between the particles of gases are elastic in nature. What is meant by “Elastic Collisions”?

UHS 2019
Chemistry
States of Matter – Gases, Liquids and Solids
Kinetic Molecular Theory Of Gases
Elimination Tool:

A) No change in the total kinetic energy

B) The velocity of the molecules changes

C) No change in potential energy during the collisions

D) No change in mass during the collisions

172 / 201

Which of the following reactions is used for the production of alcohols on industrial scale?

UHS 2019
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) Hydrogenation of alkenes

B) Hydration of alkenes

C) Hydrohalogenation of alkenes

D) Hydroxylation of alkenes

173 / 201

An automobile is moving forwards with uniform velocity due to the force exerted by its engine. If the force is doubled with the velocity remaining constant what happens to its total power?

UHS 2019
Physics
Work, Power and Energy
Power and Energy
Elimination Tool:

A) It is squared

B) It is halved

C) It is doubled

D) It does not change

174 / 201

Alkenes undergo:

UHS 2019
Chemistry
Hydrocarbons
Comparison of Reactivities of Alkanes, Alkenes and Benzene
Elimination Tool:

A) Electrophilic Addition

B) Electrophilic substitution

C) Nucleophilic substitution

D) Nucleophilic addition

175 / 201

Copper is a typical transition metal. Its atomic number is 29. In which oxidation state does it have a partially filled orbital in d-subshell?

UHS 2019
Chemistry
d and f Block Elements
Elimination Tool:

A) Cu

B) Cu+

C) Cu-

D) Cu2+

176 / 201

What is the measure of activation energy in an endothermic reaction?

UHS 2019
Chemistry
Thermochemistry
Standard States and Enthalpy Changes
Elimination Tool:

A) The energy of activation of backward reaction is less than that of forward reaction

B) The energy of activation of backward reaction is more that that of forward reaction.

C) The energy of activation of forward reaction is less than that of backward reaction.

D) The energy of activation of forward – backward reaction is same.

177 / 201

Which one of the following molecules has sp3 hybridization?

UHS 2019
Chemistry
Chemical Bonding
Elimination Tool:

A) CH4

B) C2H4

C) CO2

D) C2H2

178 / 201

Solution contains 85.5 g of sucrose (C12H22O11) in 250 cm3. What is its molarity?

UHS 2019
Chemistry
Introduction to Fundamental Concepts of Chemistry
Stoichiometry
Mole
Elimination Tool:

A) 1 M

B) 0.5 M

C) 0.25 M

D) 2 M

179 / 201

Identification tests for functional groups of organic compounds are associated with specific observations. Tollen’s reagent is an ammoniacal silver nitrate solution, which is used for the identification of a functional group X with an observation O. Identify X and O.

UHS 2019
Chemistry
Aldehydes and Ketones
Reactivity and Reactions of Carbonyl Group
Elimination Tool:

A) X = Aldehyde O = Silver mirror

B) X = Ketone, O = grey precipitate

C) X = Ketone, O = Silver mirror

D) X = Aldehyde O = Red precipitate

180 / 201

Which of the equations shows ‘’twice’’ the enthalpy change of neutralization as the following equation

UHS 2019
Chemistry
Elimination Tool:

A) MgCO3 + 2HCl -> MgCl2 + CO2 + H2O

B) KOH + HCl -> KCl + H2P

C) NH4Cl + NaOH -> NaCl + H2O + NH3

D) H2SO4 + Mg(OH)2 -> MgSO4 + 2H2O

181 / 201

For an equilibrium reaction;

The forward reaction is exothermic; an increase in temperature shifts the equilibrium position towards the left.

UHS 2019
Chemistry
Chemical Equilibrium
State of Chemical Equilibrium
Elimination Tool:

A) The concentrations of SO2 and O2 increases and concentration of SO3 decreases as the temperature increases.

B) The concentrations of SO3, SO2, and O2 increase as the temperature increases.

C) The concentrations Of SO2 and O2 decreases and concentration of SO3 increases as the temperature increases.

D) The concentrations of SO2 and O2 increase and concentration of SO3 increases as the temperature increases.

182 / 201

During stoichiometric calculations, which of the following laws must be followed?

UHS 2019
Chemistry
Stoichiometry
Theoretical Yield, Actual Yield and Percentage Yield
Elimination Tool:

A) Dalton's law

B) Avogadro's law

C) Law of conservation of mass

D) Law of conservation of energy

183 / 201

The pH of 10-2 M aqueous solution of sodium hydroxide is:

UHS 2019
Chemistry
Acids, Bases and Salts
Buffer Solutions and Their Applications
Elimination Tool:

A) 14

B) 10

C) 12

D) 13

184 / 201

Which derivative of benzene shows maximum reactivity in electrophilic substitution reactions?

UHS 2019
Chemistry
Hydrocarbons
Reactions of Benzene
Elimination Tool:

A) Benzoic acid

B) Methyl benzene

C) Benzaldehyde

D) Nitrobenzene

185 / 201

Chlorofluorocarbons (CFCs) are important compounds that are used as refrigerants but these are also responsible for Ozone layer depletion. If a Chlorofluorocarbon CFCl3 is present in stratosphere, which of it’s reaction intermediates are actually responsible for the breakdown of the ozone molecule?

UHS 2019
Chemistry
Environmental Chemistry
Elimination Tool:

A) CFCl2* and Cl*

B) Cl* and ClO*

C) CFCl2* and ClO*

D) CFCl2 and CFCl3

186 / 201

Which type of reaction takes place when a carbonyl compound is treated with a mixture of NaCN and an acid?

UHS 2019
Chemistry
Aldehydes and Ketones
Reactivity and Reactions of Carbonyl Group
Elimination Tool:

A) Electrophilic addition reaction

B) Substitution reaction

C) Nucleophilic addition reaction

D) Displacement reaction

187 / 201

The Ka values of HCI, CH3COOH, HF, and H2SO4 are 107, 1.85 x 10-5, 6.7 x 10-5 and 102 respectively. The decreasing order of acidic strength is:

UHS 2019
Chemistry
Acids, Bases and Salts
Strength of Acid and Bases
Elimination Tool:

A) CH3COOH > HF > H2SO4 > HCI

B) HCI > H2SO4 > HF > CH3COOH

C) HCl > CH3COOH > HF > H2SO4

D) HCl > HF > H2SO4 > CH3COOH

188 / 201

Nitrogen has the atomic mass of 7.
Which of the following electronic configurations is of a Nitrogen atom in ground state?

UHS 2019
Chemistry
Atomic Structure
Elimination Tool:

A) 1s2, 2s2, 2px1, 2py1, 2pz1

B) 1s2, 2s2, 2px2, 2pz1

C) 1s2, 2s2, 2px2, 2py1

D) 1s2, 2s2, 2py2, 2pz1

189 / 201

According to Watson and Crick’s model of DNA, the DNA molecule consists of a double helix. What type of forces are responsible to keep two strands of DNA together?

UHS 2019
Chemistry
Chemistry of Life
Proteins
Elimination Tool:

A) Van der Waals forces

B) Ionic bonding

C) Hydrogen bonding

D) Dipole-induced dipole forces

190 / 201

If the energy of activation of a chemical reaction is very low, the rate of that chemical reaction is observed to be very high because?

UHS 2019
Chemistry
Reaction Kinetics
Elimination Tool:

A) Concentration of the reactants becomes irrelevant

B) Reaction proceeds without any transition state

C) Number of efficient or fruitful collisions increase

D) Molecules of the reactants move slowly

191 / 201

Which of the following is the electronic configuration of Cr?

UHS 2019
Chemistry
Atomic Structure
Elimination Tool:

A) [Ar] 3d5 4s2

B) [Ar] 3d5 4s1

C) [Ar] 3d4 4s2

D) [Ar] 3d6 4s0

192 / 201

Which of the following statement shows that no work is done?

UHS 2019
Physics
Work, Power & Energy
Work Done by Constant Force and Variable Forces
Elimination Tool:

A) Pushing a car to start it moving

B) Lifting the weights.

C) The moon Orbiting the earth.

D) Writing an essay on a page.

193 / 201

Aqueous solutions of Iodine and Sodium hydroxide were mixed in a round bottom flask at 70 C. Following chemical reaction was carried out.

3I2 + 6 NaOH -> NaIO3 + NaI + H2O
This reaction is termed as;

UHS 2019
Chemistry
Solution and Colloids
Energetics of Solution
Elimination Tool:

A) Redox reaction

B) Precipitation reaction

C) Substitution reaction

D) Free radical reaction

194 / 201

Keeping inview the values of standard reduction potential given above, which one of the following would you select as a feasible redox chemical reaction?

UHS 2019
Chemistry
Electrochemistry
Elimination Tool:

A) Cl- + I2 -> Cl2 + 2I-

B) Cu + Zn2+ -> Cu2+ + Zn

C) Mg + 2H + -> Mg2+ + H2

D) 2Au + 6H+ -> 2Au3+ + 3 H2

195 / 201

Free Nitrogen and Oxygen are present in atmosphere but they do not react with each other under normal conditions because:

UHS 2019
Chemistry
Environmental Chemistry
Elimination Tool:

A) Nitrogen requires a catalyst

B) Oxygen is very inactive

C) Oxygen is found in less concentration

D) Nitrogen is highly inactive gas

196 / 201

The structure of Xenon trioxide is shown below:

With reference to the valence shell electron pair repulsion theory (VSEPR), the shape of XeO3 is:

UHS 2019
Chemistry
Chemical Bonding
Elimination Tool:

A) Trigonal planar

B) Tetrahedral

C) Bent (or angular)

D) Trigonal pyramidal

197 / 201

In the following reaction sequence, product D will be:

UHS 2019
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) 1 – propanol

B) Propanoic acid

C) 2 – propanol

D) Mixture of methanol and ethanol

198 / 201

In contact process, to which substance adequate quantities of water is added to convert it to sulphuric acid?

UHS 2019
Chemistry
Chemical Equilibrium
State of Chemical Equilibrium
Elimination Tool:

A) H2S2O7

B) HSO4-

C) SO3

D) S

199 / 201

An intermolecular force of attraction X is relatively stronger than the other intermolecular forces. It stabilizes alpha-helix and Beta-pleated sheets of proteins. The double helical structure of DNA is also stabilized by this force of attraction. Identify X.

UHS 2019
Chemistry
Chemical Bonding
Elimination Tool:

A) Van Der Waals Forces

B) Hydrogen bonding

C) Ionic interactions

D) Dipole dipole attraction

200 / 201

Which of the following molecule shows cis- trans isomers?

UHS 2019
Chemistry
Fundamental Principles of Organic Chemistry
Introduction to Fundamental Principles of Organic Chemistry
Elimination Tool:

A) C2H4

B) C2H2Cl4

C) C2H2Br2

D) C2HCl3

201 / 201

The range Of the projectile depends upon the velocity of the projection and the angle of the projection i.e 45. For a fixed velocity, when the angle of projection is larger than 45. Which of the following is correct?

UHS 2019
Physics
Motion in Two Dimensions
Maximum height and range of projectile
Elimination Tool:

A) The height attained by the projectile will be more but the range is less

B) Both the height and the range attained by the projectile will be more.

C) The height attained by the projectile will be less but the range is more.

D) Both the height and the range attained by the projectile will be less.

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