In a reaction:

A+B 2C

When equilibrium was attained, the concentration was

[A] = [B] = 4 moles/dm3

[C]= 6 moles/dm3
The equilibrium constant Kc of this reaction is:

Sindh Mock 2
Chemistry
Chemical Equilibrium
Equilibrium Constant
A) 1.25
Show Explanation
B) 2.25
Show Explanation
C) 3.25
Show Explanation
D) 2.75
Show Explanation

The radii of the second orbit of the hydrogen atom calculated from Bohr’s model is:

Sindh Mock 2
Chemistry
Atomic Structure
Bohrs Model of Atom
A) 0.529 Å
Show Explanation
B) 4.8 Å
Show Explanation
C) 2.41 Å
Show Explanation
D) 3.4 Å
Show Explanation

Diamond and Graphite:

Sindh Mock 2
Chemistry
States of Matter – Gases, Liquids and Solids
Properties of Crystalline Solids
A) are isotopes
Show Explanation
B) are isomers
Show Explanation
C) are allotropes
Show Explanation
D) have the same structure
Show Explanation

What substrates are required to add a NO2 group to benzene?

Sindh Mock 2
Chemistry
Alkyl Halides and Amines
Reactivity and Reactions of Alkyl Halides
A) Concentrated HNO3/Concentrated H2SO4/100˚C
Show Explanation
B) Concentrated HNO3/Concentrated H2SO4/50˚C
Show Explanation
C) Concentrated HNO3/50˚C
Show Explanation
D) Concentrated HNO3/100˚C
Show Explanation

Sodium reacts with water more vigorously than lithium because it:

Sindh Mock 2
Chemistry
s and p Block Elements
General Behaviour of Alkali and Alkaline Earth Metals
A) Has a higher atomic weight
Show Explanation
B) Is more electronegative
Show Explanation
C) Is more electropositive
Show Explanation
D) Is a metal
Show Explanation

950 torr corresponds to:

Sindh Mock 2
Chemistry
States of Matter – Gases, Liquids and Solids
Daltons Law of Partial Pressures
A) 3.5 atm
Show Explanation
B) 1 atm
Show Explanation
C) 3 atm
Show Explanation
D) 1.25 atm
Show Explanation

The general formula for an aldehyde is:

Sindh Mock 2
Chemistry
Aldehydes and Ketones
Introduction to Aldehydes and Ketones
A) R-OH
Show Explanation
B) R-COOH
Show Explanation
C) R-CO-R
Show Explanation
D) R-X
Show Explanation
E) R-CHO
Show Explanation

When an element exists in more than one crystalline form, the phenomenon is termed as:

Sindh Mock 2
Chemistry
States of Matter – Gases, Liquids and Solids
Properties of Crystalline Solids
A) Isomorphism
Show Explanation
B) Pollymorphism
Show Explanation
C) Isomerism
Show Explanation
D) Anisotropy
Show Explanation

Borax exists in nature as:

Sindh Mock 2
Chemistry
Periodicity in Elements
A) Na2B4O7.10H2O
Show Explanation
B) Na2B4O7.7H2O
Show Explanation
C) Na2B4O7.5H2O
Show Explanation
D) Na2B4O7.3H2O
Show Explanation
E) Na2B4O7.H2O
Show Explanation

Linear combination of atomic orbitals (LCAO) results in the formation of:

Sindh Mock 2
Chemistry
Chemical Bonding
Energetics of Bond Formation
A) Sigma bond
Show Explanation
B) Pi bond
Show Explanation
C) Bonding molecular orbitals only
Show Explanation
D) Bonding and antibonding molecular orbitals
Show Explanation

A child’s balloon has a volume 3.80 dm3, when the temperature is 35°C. If the balloon is put in a refrigerator and cooled to 5°c, the approximate volume of the balloon is (assume pressure inside the balloon is equal to atmospheric pressure):

Sindh Mock 2
Chemistry
States of Matter – Gases, Liquids and Solids
Gas Laws and General Gas Equation
A) 3.00 dm3
Show Explanation
B) 3.43dm3
Show Explanation
C) 3.08 dm3
Show Explanation
D) 3.25 dm3
Show Explanation

Which of the following statements about H2S is false:

Sindh Mock 2
Chemistry
s and p Block Elements
General Behaviour of Alkali and Alkaline Earth Metals
A) It is a covalent compound
Show Explanation
B) It is a gas with a bad smell
Show Explanation
C) It is a strong reducing agent
Show Explanation
D) It is a molecule which is non linear
Show Explanation
E) It is a weak base in water
Show Explanation

Non-stoichiometric compounds are formed by:

Sindh Mock 2
Chemistry
Periodicity in Elements
Periodic Trends
A) Only alkali metals
Show Explanation
B) Only transition elements
Show Explanation
C) Only noble gases
Show Explanation
D) None of the above
Show Explanation

The heat of a reaction can be calculated by using:

Sindh Mock 2
Chemistry
Thermochemistry
Heat Capacity and Calorimetry
A) Joule’s Law
Show Explanation
B) Ohm’s Law
Show Explanation
C) Hess’s Law
Show Explanation
D) Faraday’s Law
Show Explanation

Sigma bond is formed by:

Sindh Mock 2
Chemistry
Chemical Bonding
Intermolecular Forces
A) Transferring the electrons
Show Explanation
B) Head-on overlapping of atomic orbitals
Show Explanation
C) Mutual but unequal sharing of electrons
Show Explanation
D) Parallel overlapping of atomic orbitals
Show Explanation

The series limit for the Balmer series of hydrogen spectrum occurs at 3664 A. Calculate Ionization energy of hydrogen atom.

Sindh Mock 2
Chemistry
Atomic Structure
A) 21.7 x 10-19J
Show Explanation
B) 6.626 x 10-34J
Show Explanation
C) 5.425 x 10-19J
Show Explanation
D) 3664 x 10-10J
Show Explanation

Nascent hydrogen used in the formation of methane is obtained from the reaction of:

Sindh Mock 2
Chemistry
s and p Block Elements
General Behaviour of Alkali and Alkaline Earth Metals
A) NaHCO3 with Zn
Show Explanation
B) HCl with Zn
Show Explanation
C) KOH with Zn
Show Explanation
D) H2O with Zn
Show Explanation

Which of the following statements are correct about noble gases?

Sindh Mock 2
Chemistry
Periodicity in Elements
Periodic Trends
A) They belong to 18th group of modern periodic table
Show Explanation
B) Except Rn, all the remaining atoms are present in the air.
Show Explanation
C) These elements belong to 17th group in IUPAC system.
Show Explanation
D) These are highly reactive elements.
Show Explanation

Ethene is obtained by electrolyzing

Sindh Mock 2
Chemistry
Hydrocarbons
Alkenes
A) Potassium formate
Show Explanation
B) Potassium succinate
Show Explanation
C) Potassium acetate
Show Explanation
D) Potassium fumarate
Show Explanation

Which of the following acids is used for Etching glass?

Sindh Mock 2
Chemistry
Acids, Bases and Salts
Acidic, Basic and Amphoteric Substances
A) Hydrochloric Acid
Show Explanation
B) Nitric Acid
Show Explanation
C) Hydrofluoric Acid
Show Explanation
D) Sulphuric Acid
Show Explanation

Magnesium oxide is used in the making of the lining of blast furnaces. It is extracted from seawater as follows. Aqueous calcium hydroxide is added to seawater.

Ca(OH)2 (aq) + MgCl2 (aq) + Mg(OH)2 (s) + CaCl2 (aq)

The magnesium hydroxide is then filtered off and roasted.

Which of the following comparisons between calcium and magnesium explains why magnesium hydroxide forms?

Sindh Mock 2
Chemistry
s and p Block Elements
General Behaviour of Alkali and Alkaline Earth Metals
A) Magnesium is less electropositive than calcium.
Show Explanation
B) Magnesium is lower than calcium in the reactivity series
Show Explanation
C) The enthalpy change of hydration for Mg2+is less exothermic than for Ca2+
Show Explanation
D) The solubility product for Mg(OH)2is lower than that for Ca(OH)2
Show Explanation

“Zymase”- a group of 14 enzymes, used in the fermentation of starch, is present in:

Sindh Mock 2
Chemistry
Chemistry of Life
Enzymes
A) Bacteria
Show Explanation
B) Yeast
Show Explanation
C) Fungi
Show Explanation
D) Algae
Show Explanation

Which type of isomerism depends on the distribution of carbon atoms on each side of the functional group?

Sindh Mock 2
Chemistry
Hydrocarbons
Introduction to Hydrocarbons
A) Structural isomerism
Show Explanation
B) Functional isomerism
Show Explanation
C) Chain isomerism
Show Explanation
D) Metamerism
Show Explanation

In a double-bonded carbon atom (C=C):

Sindh Mock 2
Chemistry
Chemical Bonding
A) hybridization occurs between the s-orbital and one p-orbital
Show Explanation
B) hybridization occurs between the s-orbital and two p-orbitals
Show Explanation
C) hybridization occurs between the s-orbital and three p-orbitals
Show Explanation
D) no hybridization occurs between the s-and p-orbitals
Show Explanation

The enthalpy change accompanying the gain of an electron by a neutral gaseous atom to form a negative ion is called:

Sindh Mock 2
Chemistry
Thermochemistry
Enthalpies of Reactions and its Types
A) Ionization potential
Show Explanation
B) Electronegativity
Show Explanation
C) Electron affinity
Show Explanation
D) Lattice energy
Show Explanation

When 18 x 10-3 moles/dm3 of acetic acid react with 22 x 10-3 moles/dm3 of ethyl alcohol to form 40 x 10-3 moles/dm3 of ethyl acetate and 40 x 10-3 moles/dm-3 of water. Find the value of equilibrium constant (kc):

Sindh Mock 2
Chemistry
Chemical Equilibrium
Equilibrium Constant
A) 4.04
Show Explanation
B) 3.14
Show Explanation
C) 3.04
Show Explanation
D) 2.02
Show Explanation

Outer transition elements belong to

Sindh Mock 2
Chemistry
Periodicity in Elements
Introduction to the Periodic Table
A) s-block
Show Explanation
B) p-block
Show Explanation
C) d-block
Show Explanation
D) f-block
Show Explanation

Dissolution of ammonium nitrate in water is an endothermic process. Which of the following graphs shows how the temperature alters as the ammonium nitrate is added to water and then the solution is left at room temperature?

Sindh Mock 2
Chemistry
Thermochemistry
Standard States and Enthalpy Changes
A) Option A
Show Explanation
B) Option B
Show Explanation
C) Option C
Show Explanation
D) Option D
Show Explanation

The false statement about lithium is:

Sindh Mock 2
Chemistry
Periodicity in Elements
Introduction to the Periodic Table
A) It is softer than other alkali metals
Show Explanation
B) It is least reactive
Show Explanation
C) It possesses higher melting and boiling points
Show Explanation
D) It forms chloride which is soluble in alcohol
Show Explanation

The chemical properties of Sulphuric Acid is/are:

Sindh Mock 2
Chemistry
Acids, Bases and Salts
A) Acidic properties
Show Explanation
B) Oxidizing properties
Show Explanation
C) Dehydrating properties
Show Explanation
D) Sulfonating properties
Show Explanation
E) All of these
Show Explanation

80% of the coal is used in ____ ?

Sindh Mock 2
Chemistry
Fundamental Principles of Organic Chemistry
Importance of Organic Chemistry
A) Lime kiln
Show Explanation
B) Domestic purposes
Show Explanation
C) Fuel
Show Explanation
D) Motor bikes
Show Explanation

Alkanes having five to seventeen carbon atoms per molecule are:

Sindh Mock 2
Chemistry
Hydrocarbons
Alkanes and Paraffins
A) liquids
Show Explanation
B) solids
Show Explanation
C) gases
Show Explanation
D) semi solid wax
Show Explanation

Benzene can be prepared from:

Sindh Mock 2
Chemistry
Hydrocarbons
Benzene and its Preparation
A) From Petroleum
Show Explanation
B) From Coal
Show Explanation
C) From Acetylene
Show Explanation
D) From Phenol
Show Explanation
E) All of these
Show Explanation

The amount of energy released by absorbing an electron in the valence shell is:

Sindh Mock 2
Chemistry
Atomic Structure
Sub Atomic Particles and Their Discoveries
A) Ionization Energy
Show Explanation
B) Electron Affinity
Show Explanation
C) Electronegativity
Show Explanation
D) Atomic Radius
Show Explanation

The electronic configuration of iron is:

Sindh Mock 2
Chemistry
Atomic Structure
Sub Atomic Particles and Their Discoveries
A) 1s2 , 2s2 , 2p6 , 3s2 , 3p6 , 3d5 , 4s2
Show Explanation
B) 1s2, 2s2 , 2p6 , 3s2 , 3p6 , 3d5, 4s1
Show Explanation
C) 1s2 , 2s2, 2p6 , 3s2 , 3p6 , 3d6 , 4s2
Show Explanation
D) 1s2 , 2s2 , 2p6 , 3s2 , 3p6 , 3d3 , 4s2
Show Explanation

Purification of bauxite whose major impurity Is silica (SiO2) is carried out through:

Sindh Mock 2
Chemistry
Macromolecules
Introduction and Structure of Polymers
A) Baeyer’s Method
Show Explanation
B) Hall’s Method
Show Explanation
C) Serpek’s Method
Show Explanation
D) Contact Method
Show Explanation

What is the chemical formula for plaster of Paris?

Sindh Mock 2
Chemistry
s and p Block Elements
Introduction to s and p Block Elements
A) CuSO4. 5H2O
Show Explanation
B) 2CaSO4. 2H2O
Show Explanation
C) (CaSO4)2 H2O
Show Explanation
D) MgSO4. 7H2O
Show Explanation

Hydrides which are prepared by passing hydrogen gas over hot alkali metals or alkaline earth metals are called:

Sindh Mock 2
Chemistry
s and p Block Elements
General Behaviour of Alkali and Alkaline Earth Metals
A) Covalent hydrides
Show Explanation
B) Ionic hydrides
Show Explanation
C) Complex hydrides
Show Explanation
D) Metallic hydrides
Show Explanation

Which one of the following formulae represents the organic compound formed when methylbenzene is heated under reflux with alkaline potassium manganate (VII) solution and the mixture then acidified?

Sindh Mock 2
Chemistry
Hydrocarbons
Reactions of Benzene
A) A
Show Explanation
B) B
Show Explanation
C) C
Show Explanation
D) D
Show Explanation
E) E
Show Explanation

A particle moves from position r = 3i+2j-6k to r = 14i+13j+9k under the action of a Force F = 8i+2j+6k. Find the work done
by the force:

Sindh Mock 2
Physics
Scalars and Vectors
Basic Concepts of Vectors
A) 50 units
Show Explanation
B) 75 units
Show Explanation
C) 125 units
Show Explanation
D) 155 units
Show Explanation
E) 200 units
Show Explanation

From a mixture of CO2 and H2 gases, CO2 can be separated by passing the mixture through:

Sindh Mock 2
Chemistry
Solution and Colloids
Solubility and Solubility Curves
A) Water at high temperature
Show Explanation
B) Water under high pressure
Show Explanation
C) Cold water
Show Explanation
D) Acidified water
Show Explanation

Sum of oxidation numbers of all the molecules in a neutral atom is

Sindh Mock 2
Chemistry
Electrochemistry
Oxidation Number or State
A) Unity
Show Explanation
B) Negative
Show Explanation
C) 1
Show Explanation
D) 0
Show Explanation

The chemical name of the baking soda is:

Sindh Mock 2
Chemistry
s and p Block Elements
Introduction to s and p Block Elements
A) Sodium carbonate
Show Explanation
B) Sodium bicarbonate
Show Explanation
C) Sodium hydrogen carbonate
Show Explanation
D) Sodium hydroxide
Show Explanation

Physical methods of finding the rate of reaction always involve

Sindh Mock 2
Chemistry
Reaction Kinetics
Rate and velocity of chemical reaction
A) A catalyst
Show Explanation
B) A graph
Show Explanation
C) A calculating software
Show Explanation
D) None of These
Show Explanation

Dissolution of ammonium nitrate in water is an endothermic process. Which of the following graphs shows how the temperature alters as the ammonium nitrate is added to water and then the solution is left at room temperature?

Sindh Mock 2
Chemistry
Thermochemistry
Standard States and Enthalpy Changes
A) Option A
Show Explanation
B) Option B
Show Explanation
C) Option C
Show Explanation
D) Option D
Show ExplanationA

When methylbenzene is treated with bromine in the presence of a catalyst, a mixture of two monobromo isomers is formed. What are the structures of these two isomers?

Sindh Mock 2
Chemistry
Periodicity in Elements
Introduction to the Periodic Table
A) Option A
Show Explanation
B) Option B
Show Explanation
C) Option C
Show Explanation
D) Option D
Show Explanation

Chlorine is manufactured commercially by the electrolysis of aqueous sodium chloride (brine). Which other products are made in this process?

Sindh Mock 2
Chemistry
Macromolecules
Introduction and Structure of Polymers
A) Hydrochloric acid and hydrogen
Show Explanation
B) Hydrogen and sodium
Show Explanation
C) Hydrogen and sodium hydroxide
Show Explanation
D) Sodium and sodium hydroxide
Show Explanation

According to the law of mass action, “The rate of chemical reaction” is proportional to the:

Sindh Mock 2
Chemistry
Chemical Equilibrium
Equilibrium Constant
A) The amount of product formed
Show Explanation
B) Product of the molar concentration of reactants
Show Explanation
C) The initial concentration of reactants
Show Explanation
D) Catalyst
Show Explanation

The crystals formed as a result of vander der Waals interactions are:

Sindh Mock 2
Chemistry
States of Matter – Gases, Liquids and Solids
Diffusion And Effusion
A) Molecular crystals
Show Explanation
B) Covalent crystals
Show Explanation
C) Metallic crystals
Show Explanation
D) Ionic crystals
Show Explanation

The raindrop acquires a spherical shape and ink spread over blotting paper due to:

Sindh Mock 2
Chemistry
Chemical Bonding
Intermolecular Forces
A) Surface tension
Show Explanation
B) Adhesive forces
Show Explanation
C) Viscosity
Show Explanation
D) Polarity
Show Explanation

Transition elements have coloured compounds because:

Sindh Mock 2
Chemistry
Periodicity in Elements
Introduction to the Periodic Table
A) Their bond energy is low
Show Explanation
B) they easily absorb energy
Show Explanation
C) splitting of the five degenerate d-orbitals take place
Show Explanation
D) d-orbitals are very close to p-orbitals
Show Explanation

Primary Alcohol is produced by reactions of Grignard’s reagent with _________ followed by hydrolysis in an acidic medium.

Sindh Mock 2
Chemistry
Alcohol, Phenols, and Ethers
A) Carbon dioxide
Show Explanation
B) Formaldehyde
Show Explanation
C) Acetaldehyde
Show Explanation
D) Ketone
Show Explanation

Identify the word or phrase that needs to be changed for the sentence to be correct:

The secretary must type these letters before lunch.

Sindh Mock 2
English
Identify errors in sentence
A) The
Show Explanation
B) Must
Show Explanation
C) These letters
Show Explanation
D) Lunch
Show Explanation
E) No error
Show Explanation

Choose the word most similar in meaning to the capitalized one.

FREIGHT:

Sindh Mock 2
English
Key Vocabulary
A) Worries
Show Explanation
B) Luggage
Show Explanation
C) Instruments
Show Explanation
D) Foolish
Show Explanation
E) Uneasy
Show Explanation

Identify the word or phrase that needs to be changed for the sentence to be correct:

He brought down the tiger with his first shot.

Sindh Mock 2
English
Identify errors in sentence
A) brought
Show Explanation
B) down
Show Explanation
C) with
Show Explanation
D) first shot
Show Explanation
E) No error
Show Explanation

Complete the sentence by choosing the most appropriate word, from the given lettered choices (A to E) below each.

The injured player was taken _____ the field.

Sindh Mock 2
English
Fill in the blank
A) Of
Show Explanation
B) Off
Show Explanation
C) Out
Show Explanation
D) In
Show Explanation

Select the word with the correct spelling

Sindh Mock 2
English
Key Vocabulary
A) Benefited
Show Explanation
B) Benefitted
Show Explanation
C) Benifited
Show Explanation
D) Benifitted
Show Explanation

Identify the word or phrase that needs to be changed for the sentence to be correct:

He brought down the tiger with his first shot.

Sindh Mock 2
English
Identify errors in sentence
A) brought
Show Explanation
B) down
Show Explanation
C) with
Show Explanation
D) first shot
Show Explanation
E) No error
Show Explanation

Select the most suitable synonym for the given words:

APPALLING

Sindh Mock 2
English
Key Vocabulary
A) Terrible
Show Explanation
B) Appealing
Show Explanation
C) Waning
Show Explanation
D) Snowballing
Show Explanation

Complete the sentence by choosing the most appropriate word, from the given lettered choices (A to E) below each.

The box is ______ green outside and white inside.

Sindh Mock 2
English
Fill in the blank
A) Carved
Show Explanation
B) Created
Show Explanation
C) Painted
Show Explanation
D) Chiseled
Show Explanation

Complete the sentences by choosing the most appropriate word, from the given lettered choices A to E below:

Nearly everyone dreams of building _____ ideal house.

Sindh Mock 2
English
Fill in the blank
A) its
Show Explanation
B) their
Show Explanation
C) his
Show Explanation
D) him
Show Explanation

Complete the sentence by choosing the most appropriate

option, from the given lettered choices (A to E) below:

The tree must ______ planted over fifty years ago.

Sindh Mock 2
English
Fill in the blank
A) been
Show Explanation
B) be been
Show Explanation
C) would been
Show Explanation
D) have been
Show Explanation

Complete the sentences by choosing the most appropriate word, from the given lettered choices A to E below:

Life ____ water, light, a moderate temperature, and a variety of chemical elements.,

Sindh Mock 2
English
Fill in the blank
A) Finds
Show Explanation
B) Reveals
Show Explanation
C) Designs
Show Explanation
D) Calculates
Show Explanation
E) Requires
Show Explanation

Choose the correct sentence:

Sindh Mock 2
English
Tenses and Sentence Structure
A) “Trust me, I know what I’m doing,” Bilal said. “Your car is not hard to fix.”
Show Explanation
B) “Trust me, I know what I’m doing,” Bilal said. “your car are not hard to fix.”
Show Explanation
C) “Trust me I know what Im doing,” Bilal said. “Your car is not hard to fix.”
Show Explanation
D) “Trust me, I know what I’m doing,” Bilal said. Your car is not hard to fix.
Show Explanation

Identify the word or phrase that needs to be changed for the sentence to be correct:
The noise of the traffic make it impossible for us to work with the windows open.

Sindh Mock 2
English
Identify errors in sentence
A) The noise
Show Explanation
B) traffic make
Show Explanation
C) for us
Show Explanation
D) with the
Show Explanation
E) No error
Show Explanation

Choose the lettered word or phrase that is most nearly opposite in meaning to the word in capital letters.

ASSERTION

Sindh Mock 2
English
Key Vocabulary
A) statement
Show Explanation
B) denial
Show Explanation
C) claim
Show Explanation
D) unrest
Show Explanation

Identify the word or phrase that needs to be changed for the sentence to be correct:

We are expecting to go abroad this summer.

Sindh Mock 2
English
Identify errors in sentence
A) Are
Show Explanation
B) Expecting
Show Explanation
C) To go
Show Explanation
D) This
Show Explanation
E) No error
Show Explanation

Television is typical of many new scientific words which are deliberately invented from old Greek and Latin words. In this case, the prefix ‘tele’ is Greek and means ‘far’ (of telephone, telegram), while the root ‘vision’ is derived from the Latin verb meaning ‘to see’.
The word “Television” is invented from:

Sindh Mock 2
English
Key Vocabulary
A) English and Spanish
Show Explanation
B) French and Arabic
Show Explanation
C) Dutch and German
Show Explanation
D) Greek and Latin
Show Explanation

What type of sentence is this?

When I go swimming, I have to keep my eyes closed underwater.

Sindh Mock 2
English
Tenses and Sentence Structure
A) Complex
Show Explanation
B) Simple
Show Explanation
C) Compound
Show Explanation
D) None

Identify the tense used in the given sentence: “Everyone shall be reaching by tomorrow.”

Sindh Mock 2
English
Tenses and Sentence Structure
A) Present
Show Explanation
B) Past
Show Explanation
C) Future
Show Explanation
D) None
Show Explanation

During the first three steps of glycolysis, glucose is converted to Fructose 1, 6-diphosphate by the rearrangement of the molecule and addition of two phosphate groups. The phosphate comes from?

Sindh Mock 2
Biology
Bioenergetics
Respiration Mechanism – Glycolysis to Electron Transport Chain
A) Phospholipids of the membrane
Show Explanation
B) ADP
Show Explanation
C) inorganic phosphates
Show Explanation
D) ATP
Show Explanation

Which of the following is NOT TRUE about Human Immunodeficiency virus (HIV)?

Sindh Mock 2
Biology
Bio-diversity | Variety of Life
A) It is a retrovirus
Show Explanation
B) It is surrounded by an envelope
Show Explanation
C) It does not cause AIDS
Show Explanation
D) It causes deficiency of the human immune system
Show Explanation

The temperature that promotes the maximum activity of enzymes is referred to as ______.

Sindh Mock 2
Biology
A) Fixed temperature
Show Explanation
B) Optimum temperature
Show Explanation
C) Controlled temperature
Show Explanation
D) Active temperature
Show ExplanationA

The maximum number of electrons that an orbital can accommodate is/are:

Sindh Mock 2
Chemistry
Atomic Structure
Sub Atomic Particles and Their Discoveries
A) 0
Show Explanation
B) 1
Show Explanation
C) 2
Show Explanation
D) 3
Show Explanation

When a physician elicits the knee-jerk reflex by tapping deep tendons in the knee, the normal response is for the lower leg to swing forward. When this happens:

Sindh Mock 2
Biology
Support and Movement
Ultrastructure & Mechanism of Skeletal Muscle Contraction
A) Muscles in the front of the thigh are contracting and muscles in the back of the thigh are relaxing
Show Explanation
B) Muscles in the front of the lower leg are contracting and muscles in the back of the lower leg are relaxing
Show Explanation
C) Muscles in the back of the thigh are contracting and muscles in the front of the thigh are relaxing
Show Explanation
D) Muscles in the back of the lower leg are contracting and muscles in the front of the lower leg are relaxing
Show Explanation

Booklungs serve the function of respiration in:

Sindh Mock 2
Biology
Gaseous Exchange
Gaseous Exchange in Animals
A) Scorpion
Show Explanation
B) Earthworm
Show Explanation
C) Frog
Show Explanation
D) Cockroaches
Show Explanation

What is the correct sequence of the bones in the arm of a mammal, from the hand to the shoulder?

Sindh Mock 2
Biology
Support and Movement
Human Skeleton
A) Option A
Show Explanation
B) Option B
Show Explanation
C) Option C
Show Explanation
D) Option D
Show Explanation

An activated enzyme made of polypeptide chain and a cofactor is?

Sindh Mock 2
Biology
A) Substrate
Show Explanation
B) Coenzyme
Show Explanation
C) Apoenzyme
Show Explanation
D) Holoenzyme
Show Explanation

Bacteria having a tuft of flagella at one end are called:

Sindh Mock 2
Biology
Kingdom Prokaryote
Motility and Nutrition in Bacteria
A) Peritrichous
Show Explanation
B) Monotrichous
Show Explanation
C) Lophotrichous
Show Explanation
D) Amphitrichous
Show Explanation

Which one of the following is exclusively marine phylum?

Sindh Mock 2
Biology
Kingdom Animalia
Phylums – porifera to chordata
A) Mollusca
Show Explanation
B) Echinodermata
Show Explanation
C) Annelida
Show Explanation
D) Arthropoda
Show Explanation

The Latin words of the name given to a human being, Homo Sapiens, include the:

Sindh Mock 2
Biology
Evolution
A) Genus and family
Show Explanation
B) Family and order
Show Explanation
C) Order and class
Show Explanation
D) Genus and class
Show Explanation
E) Genus and species
Show Explanation

The diagram shows some of the muscles and bones of the human arm.

Sindh Mock 2
Biology
Support and Movement
Ultrastructure & Mechanism of Skeletal Muscle Contraction
A) Option A
Show Explanation
B) Option B
Show Explanation
C) OPtion C
Show Explanation
D) Option D
Show Explanation

How many meninges cover the human brain?

Sindh Mock 2
Biology
Coordination and Control
Central Nervous System
A) 5
Show Explanation
B) 4
Show Explanation
C) 3
Show Explanation
D) 2
Show Explanation

All of the following protect the body against the entrance of germs except:

Sindh Mock 2
Biology
Transport
Immunity and its types
A) Tears
Show Explanation
B) Mucous membranes
Show Explanation
C) Ciliated cells
Show Explanation
D) White blood cells
Show Explanation
E) Red blood cells,
Show Explanation

Identify the phylum in which the larvae is bilaterally symmetrical but the adult Is radially symmetrical:

Sindh Mock 2
Biology
Kingdom Animalia
Grade Radiata & Grade Bilateria
A) Ctenophora
Show Explanation
B) Coelenterata
Show Explanation
C) Echinodermata
Show Explanation
D) Sipunculoidea
Show Explanation

Identify the bones in which the connecting joints are freely movable joints?

Sindh Mock 2
Biology
Support and Movement
Types of Joints
A) Ankle
Show Explanation
B) Wrist
Show Explanation
C) Vertebrae
Show Explanation
D) Elbow
Show Explanation
E) All of the above
Show Explanation

Living things that would be the first to experience adverse effects if large amounts of carbon dioxide were taken out of the biosphere are:

Sindh Mock 2
Biology
Nutrition
Autotrophic Nutrition
A) Decomposers (e.g. bacteria and fungi)
Show Explanation
B) Producers (e.g. green plants)
Show Explanation
C) Primary consumers (e.g. mice)
Show Explanation
D) Secondary consumers (e.g. snakes)
Show Explanation

Enzymes are __________ in nature.

Sindh Mock 2
Biology
A) Proteins
Show Explanation
B) Carbohydrates
Show Explanation
C) Lipids
Show Explanation
D) Nucleic acid
Show Explanation

As an essential element in living organisms, _______ ion is playing an important role in insulin secretion, the release of neurotransmitters, muscle contraction, and heartbeat regulation.

Sindh Mock 2
Biology
Coordination and Control
Steps Involved in Nervous Coordination
A) Sodium
Show Explanation
B) Potassium
Show Explanation
C) Calcium
Show Explanation
D) Chloride
Show Explanation

Consider the following statements about biological communities.

I. Their members share a common gene pool

II. The community remains stable even though some physical aspect of the environment may undergo a change

III. It consists of all the populations living in a particular area.

IV. A community interacts with a non-living environment and both function together to form an ecosystem

Which two of the above statements are true?

Sindh Mock 2
Biology
Evolution
A) 1 and 2
Show Explanation
B) 1 and 3
Show Explanation
C) 2 and 4
Show Explanation
D) 2 and 3
Show Explanation
E) 3 and 4
Show Explanation

Which one is NOT true for coordination in animals?

Sindh Mock 2
Biology
Coordination and Control
Coordination in Animals
A) Transmission by the nervous system is short-lived, whereas transmission by the hormonal system is long-lasting
Show Explanation
B) The nervous system uses electrical impulses to send signals through neurons, whereas the hormonal coordination uses chemical messengers transported in the blood
Show Explanation
C) Responses are often permanent in the hormonal system but temporary and reversible in the nervous system
Show Explanation
D) In the nervous system secretory chemicals are released in blood while in the hormonal system; secretory chemicals are released in extracellular fluids

The propulsive movement of the gastrointestinal tract (GI tract) is:

Sindh Mock 2
Biology
Nutrition
Digestion and Absorption
A) Peristalsis
Show Explanation
B) Epiglottis
Show Explanation
C) Antiperistalsis
Show Explanation
D) Anus
Show Explanation

Which bones meet at the elbow joint and what kind of movement

Do they allow it?

Sindh Mock 2
Biology
Support and Movement
Types of Joints
A) Option A
Show Explanation
B) Option B
Show Explanation
C) Option C
Show Explanation
D) Option D
Show Explanation

The dark reactions of photosynthesis are characterized by:

Sindh Mock 2
Biology
Bioenergetics
Light Independent Mechanism of Photosynthesis
A) Synthesis of ATP, O2 and NADH
Show Explanation
B) Utilization of ATP, CO2 and NADPH
Show Explanation
C) Electron transfer from NADPH to RuBP
Show Explanation
D) Carbon dioxide transfer from RuBP to glucose
Show Explanation

A psychological condition usually seen in girls and young women, with loss of appetite is:

Sindh Mock 2
Biology
Nutrition
Some Common Diseases Related to Nutrition
A) Obesity
Show Explanation
B) Malnutrition
Show Explanation
C) Anorexia Nervosa
Show Explanation
D) Dyspepsia
Show Explanation

The following sequence of events occurs at the neuromuscular junction.

nerve impulse → release of V→ end plate potential → W produced in muscle fibre → X released from sarcoplasmic reticulum→ formation of Y → muscle contraction

Which one of the following shows the correct sequence from V-Y?

Sindh Mock 2
Biology
Coordination and Control
Steps Involved in Nervous Coordination
A) Option A
Show Explanation
B) Option B
Show Explanation
C) Option C
Show Explanation
D) Option D
Show Explanation

Pituitary gland releases ______ hormone and _______ hormone while ovaries produce _______ and progesterone.

Sindh Mock 2
Biology
Reproduction
Reproduction in Females
A) Follicle-stimulating and luteinizing, estrogen
Show Explanation
B) Estrogen and follicle-stimulating, luteinizing
Show Explanation
C) Luteinizing arid estrogen, follicle-stimulating
Show Explanation
D) Follicle-stimulating and estrogen, luteinizing
Show Explanation

An organism appears to be a segmented worm. Upon observation, it is determined that the organism has a closed circulation, a mouth, and an anus and does not have an exoskeleton. The organism most likely belongs to the phylum:

Sindh Mock 2
Biology
Kingdom Animalia
Phylums – porifera to chordata
A) Mollusca
Show Explanation
B) Annelida
Show Explanation
C) Echinodermata
Show Explanation
D) Arthropoda
Show Explanation

Which of the following is true in angiosperm life cycle?

Sindh Mock 2
Biology
Kingdom Plantae
Evolution of Seed Habit
A) Gametophyte are photosynthetic and partially independent than sporophyte
Show Explanation
B) Sporophytes are totally dependent on gametophytes
Show Explanation
C) Gametophytes are totally dependent on sporophytes
Show Explanation
D) Both gametophytes and sporophytes are totally dependent on each other
Show Explanation

Arrange the following according to the level of protein structures:

a) lysozyme, b) haemoglobin, c) insulin, d) hairs.

Sindh Mock 2
Biology
Biological Molecules
Proteins
A) d, a, c, b
Show Explanation
B) a, b, c, d
Show Explanation
C) d, c, b, a
Show Explanation
D) a, d, c, b
Show Explanation

Which of the following bones are present in the palm of the hand:

Sindh Mock 2
Biology
Support and Movement
Human Skeleton
A) Carpals
Show Explanation
B) Metacarpals
Show Explanation
C) Phalanges
Show Explanation
D) Tarsal
Show Explanation

In an experiment, the production of hormone secretin was blocked. As a result, levels of all of the following enzymes were affected EXCEPT:

Sindh Mock 2
Biology
Coordination and Control
Endocrine System and its Hormones
A) Trypsin
Show Explanation
B) Pepsin
Show Explanation
C) Chymotrypsin
Show Explanation
D) Amylase
Show Explanation

Pharynx leads air into _____ through glottis.

Sindh Mock 2
Biology
Gaseous Exchange
Respiratory System of Man
A) Trachea
Show Explanation
B) Bronchus
Show Explanation
C) Alveoli
Show Explanation
D) Nasal sac
Show Explanation
E) Larynx
Show Explanation

Which part of the heart is known as Left Ventricle that helps to supply oxygenated blood to almost whole body?

Sindh Mock 2
Biology
Transport
A) 6
Show Explanation
B) 1
Show Explanation
C) 3
Show Explanation
D) 4
Show Explanation

Which of the following describes the movements involved in breathing out?

Sindh Mock 2
Biology
Gaseous Exchange
Respiratory System of Man
A) Option A
Show Explanation
B) Option B
Show Explanation
C) Option C
Show Explanation
D) Option D
Show Explanation

Joints found at the vertebrates are:

Sindh Mock 2
Biology
Support and Movement
Types of Joints
A) gliding joints
Show Explanation
B) sliding joints
Show Explanation
C) partially moveable joints
Show Explanation
D) fixed joints
Show Explanation

In mosquitoes, the plasmodium is found in?

Sindh Mock 2
Biology
Kingdom Animalia
Phylums – porifera to chordata
A) Salivary glands
Show Explanation
B) Wings
Show Explanation
C) Blood
Show Explanation
D) Both Options A and B are correct
Show Explanation

The diagram shows a molecule.

Which substance might include the above molecule?

Sindh Mock 2
Biology
Biological Molecules
Proteins
A) Cellulose
Show Explanation
B) Serine
Show Explanation
C) Glucose
Show Explanation
D) Alanine
Show Explanation

In mosquitoes, the plasmodium is found in?

Sindh Mock 2
Biology
Kingdom Animalia
Phylums – porifera to chordata
A) Salivary glands
Show Explanation
B) Wings
Show Explanation
C) Blood
Show Explanation
D) Both Options A and B are correct
Show Explanation

The table shows the characteristics of the blood in one blood vessel in the body.

Which blood vessel contains blood with these characteristics?

Sindh Mock 2
Biology
Transport
A) Aorta
Show Explanation
B) Pulmonary artery
Show Explanation
C) Pulmonary vein
Show Explanation
D) Vena cava
Show Explanation

The water content of mammalian blood is regulated by antidiuretic hormone(ADH). In which part of the nephron does regulation occur ?

Sindh Mock 2
Biology
Homeostasis
Structure and Importance of the Kidney
A) The ascending limb of the loop of gentle
Show Explanation
B) The collecting duct
Show Explanation
C) The descending limb of the loop of gentle
Show Explanation
D) The proximal convoluted tubule
Show Explanation

The diagram shows the teeth of the lower jaw of a human. Which tooth is an incisor?

Sindh Mock 2
Biology
Nutrition
Digestion and Absorption
A) A
Show Explanation
B) B
Show Explanation
C) C
Show Explanation
D) D
Show Explanation

The diagram represents the human respiratory system.

While inhalation, which of the labelled muscles contract?

Sindh Mock 2
Biology
Gaseous Exchange
Respiratory System of Man
A) X only
Show Explanation
B) X and Y only
Show Explanation
C) X and Z only
Show Explanation
D) Y and Z only
Show Explanation

Class Elasmobranchi have an outer covering of?

Sindh Mock 2
Biology
Kingdom Animalia
Phylums – porifera to chordata
A) Placoid scale
Show Explanation
B) Cycloid
Show Explanation
C) Ctenoid scales
Show Explanation
D) Epidermal scales
Show Explanation

Nutritional deficiency ( vitamin D ) results in softening of the bones. This disease is called?

Sindh Mock 2
Biology
Support and Movement
Disorders of Skeleton
A) Rickets
Show Explanation
B) Cleft palates
Show Explanation
C) Microcephaly
Show Explanation
D) Down’s syndrome
Show Explanation

The viruses are:

Sindh Mock 2
Biology
Bio-diversity | Variety of Life
A) Cellular
Show Explanation
B) Prokaryotes
Show Explanation
C) Non-cellular
Show Explanation
D) Eukaryotes
Show Explanation

The following are all features of eukaryotic cells:

I. chloroplast

II. peroxisome

III. lysosome

IV. mitochondrion

v. nucleus

Which of these have a double membrane?

Sindh Mock 2
Biology
Cell Structure and Function
Prokaryotic and Eukaryotic Cells
A) I, II and IV
Show Explanation
B) I, III and V
Show Explanation
C) I, IV and V
Show Explanation
D) II, III and V
Show Explanation

The diagrams below show chromosomes in a cell undergoing mitosis and in a cell undergoing meiosis. Which of the following names the stages of division correctly?

Sindh Mock 2
Biology
Cell Cycle
Mitosis
Meiosis
A) Option A
Show Explanation
B) Option B
Show Explanation
C) Option C
Show Explanation
D) Option D
Show Explanation

Duration of menstrual cycle is how many days on average?

Sindh Mock 2
Biology
Reproduction
Reproduction in Females
A) 25
Show Explanation
B) 26
Show Explanation
C) 27
Show Explanation
D) 28

In which of the following phases of bacterial growth, is the death rate more rapid than the multiplication rate?

Sindh Mock 2
Biology
Kingdom Prokaryote
Growth and Reproduction in Bacteria
A) Stationary phase
Show Explanation
B) LAG phase
Show Explanation
C) Decline phase
Show Explanation
D) LOG phase
Show Explanation

Lysosomes are also called:

Sindh Mock 2
Biology
Cell Structure and Function
Cytoplasm and Organelles
A) Suicide Sacs
Show Explanation
B) Chondriosome
Show Explanation
C) Storage organelle
Show Explanation
D) Dicytosome
Show Explanation

Which of the following is not a nucleophile?

Sindh Mock 2
Chemistry
Alkyl Halides and Amines
Reactivity and Reactions of Alkyl Halides
A) HO-
Show Explanation
B) NH3
Show Explanation
C) BF3
Show Explanation
D) CN-
Show Explanation

Which of the following is correctly matched?

Sindh Mock 2
Biology
Cell Structure and Function
Cytoplasm and Organelles
A) AF, BG, CJ, DI, EH
Show Explanation
B) AH, BI, DF, CG, EJ
Show Explanation
C) AJ, BI, CH, DG, EF
Show Explanation
D) AH, BF, DG, CI, EJ
Show Explanation

Which type of bonds are never formed when a substrate fits into the active site of an enzyme?

Sindh Mock 2
Biology
A) Hydrogen bonds
Show Explanation
B) Ionic interactions
Show Explanation
C) Hydrophobic interactions
Show Explanation
D) Covalent linkages
Show Explanation

In an isotonic solution there would be:

Sindh Mock 2
Biology
Transport
A) No net movement of water
Show Explanation
B) Net movement of water into the cell
Show Explanation
C) Net movement of water out of the cell
Show Explanation
D) Bursting of the cell
Show Explanation

The reaction involved in chemotrophic nutrition is:

Sindh Mock 2
Biology
Nutrition
Autotrophic Nutrition
A) 6CO2 + 12H2O + light + chlorophyll -> C6H12 + 6H2O + 6CO2
Show Explanation
B) 2H2S + CO2 + light -> (CH2O)n + H2O + 2S
Show Explanation
C) NH4 + 3O2 + light -> 2NO2 + 2H2O + 4H+ + energy
Show Explanation
D) CH3COOH + enzyme -> CH3CHO + CO2
Show Explanation

Which one of the following organelles is required for aerobic respiration?

Sindh Mock 2
Biology
Cell Structure and Function
Cytoplasm and Organelles
A) Nucleus
Show Explanation
B) Mitochondrion
Show Explanation
C) Endoplasmic reticulum
Show Explanation
D) Plastids
Show Explanation

In birds, the male is the homogametic sex. A male bird showing the recessive trait was mated with a female showing the dominant trait of a characteristic governed by a pair of alleles that are sex-linked. What is the probability that the male offspring will show the dominant trait?

Sindh Mock 2
Biology
Variation and Genetics
Sex Linkage
A) 0
Show Explanation
B) 0.25
Show Explanation
C) 0.50
Show Explanation
D) 0.75
Show Explanation
E) 1.00
Show Explanation

The adaptive feature(s) which help(s) the fish to live in water include(s):

Sindh Mock 2
Biology
Kingdom Animalia
Phylums – porifera to chordata
A) A tail and an air bladder
Show Explanation
B) Unpaired and paired fins
Show Explanation
C) Streamlined body
Show Explanation
D) Gills and strong sense of smell
Show Explanation
E) All of these options
Show Explanation

The table shows some characteristics of four different vertebrates. Which vertebrate is a reptile?

✓= feature present

x = feature absent

Sindh Mock 2
Biology
Kingdom Animalia
Phylums – porifera to chordata
A) Option A
Show Explanation
B) Option B
Show Explanation
C) Option C
Show Explanation
D) Option D
Show Explanation

Most of the enzyme reactions are ______ .

Sindh Mock 2
Biology
A) Reversible
Show Explanation
B) Irreversible
Show Explanation
C) Condensation
Show Explanation
D) Oxidation
Show Explanation

The gland known as the “gland of emergency” is the:

Sindh Mock 2
Biology
Coordination and Control
Endocrine System and its Hormones
A) Pituitary
Show Explanation
B) Adrenal
Show Explanation
C) Thyroid
Show Explanation
D) Parathyroid
Show Explanation

Deficient production of hormones by adrenal glands results in: .

Sindh Mock 2
Biology
Coordination and Control
Endocrine System and its Hormones
A) Cushing’s syndrome
Show Explanation
B) Addison’s disease
Show Explanation
C) Diabetes Mellitus
Show Explanation
D) Goiter
Show Explanation

Which one is NOT an involuntary function

Sindh Mock 2
Biology
Support and Movement
Types of Muscles
A) Breathing
Show Explanation
B) Pumping of blood
Show Explanation
C) Skeletal muscle movement
Show Explanation
D) Blinking of eyes
Show Explanation

Which of the following bacteria are able to release oxygen into the environment?

Sindh Mock 2
Biology
Kingdom Prokaryote
Motility and Nutrition in Bacteria
A) Saprotrophic bacteria
Show Explanation
B) Parasitic bacteria
Show Explanation
C) Cyanobacteria
Show Explanation
D) Pathogenic bacteria
Show Explanation

Ileum is about ______ long:

Sindh Mock 2
Biology
Nutrition
Digestion and Absorption
A) 3.6 centimeters
Show Explanation
B) 3.6 mllimeters
Show Explanation
C) 3.6 inches
Show Explanation
D) 3.6 meters
Show Explanation

Which biome contains maples, oaks, and bears:

Sindh Mock 2
Biology
A) Tundra
Show Explanation
B) Tropical rain forest
Show Explanation
C) Temperate grasslands
Show Explanation
D) Taiga
Show Explanation
E) Deciduous forest
Show Explanation

An example of passive acquired immunity is?

Sindh Mock 2
Biology
Transport
Immunity and its types
A) Vaccination against smallpox
Show Explanation
B) use of polio vaccine
Show Explanation
C) passing of certain antibodies to the foetus by the pregnant women
Show Explanation
D) inoculation of antitoxin in the case of puncture wound
Show Explanation
E) both C and D
Show Explanation

During the first three steps of glycolysis, glucose is converted to Fructose 1, 6-diphosphate by the rearrangement of the molecule and addition of two phosphate groups. The phosphate comes from?

Sindh Mock 2
Biology
Bioenergetics
Respiration Mechanism – Glycolysis to Electron Transport Chain
A) Phospholipids of the membrane
Show Explanation
B) ADP
Show Explanation
C) inorganic phosphates
Show Explanation
D) ATP
Show Explanation

The sexually transmitted disease, that can affect both the male and the female genitals and may damage the eyes of babies born of infected mothers is:

Sindh Mock 2
Biology
Reproduction
Sexually Transmitted Diseases
A) AIDS
Show Explanation
B) Hepatitis
Show Explanation
C) Gonorrhoea
Show Explanation
D) All of these
Show Explanation

Nucleus with an excess of neutrons may decay radioactivity with the emission of:

Sindh Mock 2
Physics
Nuclear Physics
Radioactivity
A) a neutron
Show Explanation
B) a proton
Show Explanation
C) an electron
Show Explanation
D) a positron
Show Explanation

________ are very high energy electromagnetic radiations of the extremely short wavelength emitted from the nuclei of radioactive atoms originating from the high energy transitions of the nucleons in the nuclei.

Sindh Mock 2
Physics
Nuclear Physics
Radioactivity
A) Alpha rays
Show Explanation
B) Beta rays
Show Explanation
C) Gamma rays
Show Explanation
D) Electromagnetic rays
Show Explanation

The internal energy of the system decreases in an adiabatic process. Which of the following must be true regarding this process?

Sindh Mock 2
Physics
Heat and Thermodynamics
First Law of Thermodynamics
A) Heat flows out of the system
Show Explanation
B) Work is done by the system
Show Explanation
C) Work is done by the surrounding
Show Explanation
D) The potential energy of the system is changing
Show Explanation

A sample of an ideal gas may : expand adiabatically or expand isothermally. The net flow of heat into the gas from the exterior is:

Sindh Mock 2
Physics
Heat and Thermodynamics
First Law of Thermodynamics
A) Positive in each case
Show Explanation
B) Negative for I and positive for II
Show Explanation
C) Positive for I and negative for II
Show Explanation
D) Zero in each case
Show Explanation
E) Zero in I and positive for II
Show Explanation

.A stone dropped from a certain height can reach the ground in 5 s. It is stopped after 3 seconds of its fall and then allowed to fall again. Find the time taken by the stone to reach the ground for the remaining distance.

Sindh Mock 2
Physics
Forces and Motion
Motion in Two Dimensions
A) 2 s
Show Explanation
B) 4 s
Show Explanation
C) 6 s
Show Explanation
D) 8 s
Show Explanation
E) 10 s
Show Explanation

An apple is thrown with a speed of 30 m/s in a direction 30° above the horizon. Find out its horizontal range. (g= 9.8 m/s2)

Sindh Mock 2
Physics
Forces and Motion
Motion in Two Dimensions
A) 20 m
Show Explanation
B) 40 m
Show Explanation
C) 60 m
Show Explanation
D) 80 m
Show Explanation

In Young’s double-slit experiment, if d is the separation between two slits 1 is the wavelength of light and θ is the angle of the line from the centre of slits to the point of observation on the screen; then for maxima (bright fringe); the formula is _________.

Sindh Mock 1
Physics
Optics, Nature of Light and Optical Instruments
Young’s Double Slit Experiment
A) 2d sinθ = mλ ; m = 0 .. 2, …
Show Explanation
B) dsinθ = mλ ; m = 0, 1, 2, …
Show Explanation
C) .sin θ = (m + ½) λ ; m = 0, 1, 2, …..
Show Explanation
D) 2msinθ = dλ ; m = 0, 1, 2, ….
Show Explanation

In the photoelectric effect, a photon of energy hv is incident on the metal surface. The energy required to eject the valence electron from the surface of the metal is expressed as:

Sindh Mock 2
Physics
Dawn of Modern Physics
Wave Nature of Particles
A) Wave nature of the light
Show Explanation
B) Compton scattering
Show Explanation
C) Melting point of the metal
Show Explanation
D) Work function of the metal
Show Explanation

Identify the instrument/s which is/are used for the measurement of resistance:

I. Wheatstone Bridge

II. Meter Bridge

III. Post office Box

IV. Ohmmeter

NTS 2015 DUHS and JSMU
Physics
Current Electricity
Wheatstone Bridge and Potentiometer
A) I only
Show Explanation
B) I and II only
Show Explanation
C) II and III only
Show Explanation
D) III and IV only
Show Explanation
E) I, II, III, and IV
Show Explanation

A particle carrying charge of 2e falls through a potential difference of 3.0 V. Calculate energy acquired by it.

Sindh Mock 2
Physics
Electrostatics
Electron Volt
A) 9.6 x 10-19J
Show Explanation
B) 12.1 x 10-19J
Show Explanation
C) 14.5 x 10-19J
Show Explanation
D) 16.7 x 10-19J
Show Explanation

Incident rays of light parallel to the principal axis of a convex lens, after refraction by the lens, will:

Sindh Mock 2
Physics
Optics, Nature of Light and Optical Instruments
Magnifying and Resolving Power of Optical Instruments
A) converge at the principal focus
Show Explanation
B) converge inside the principal focus
Show Explanation
C) converge outside the principal focus
Show Explanation
D) converge at the center of curvature
Show Explanation

Four particles independently move at the same speed in a direction perpendicular to the same magnetic field. Which particle is deflected the most?

Sindh Mock 2
Physics
Magnetism and Electromagnetic Induction
Determination of e/m of an Electron
A) a copper ion
Show Explanation
B) a helium nucleus
Show Explanation
C) an electron
Show Explanation
D) a proton
Show Explanation

The circuit diagram shows a network of resistors each of resistance R.

What is the effective resistance between the points X and Y?

Sindh Mock 2
Physics
Current Electricity
Electrical Power and Power Dissipation in Resistors
A) 2R/7
Show Explanation
B) R/2
Show Explanation
C) 5R/8
Show Explanation
D) 2R/3
Show Explanation

A train is approaching a station at 90 km/h sounding a whistle of frequency 1000 Hz. What will be the apparent frequency heard by the listener sitting on the platform if the train moves away from the station at the same speed? (speed of sound= 340 m/s)

Sindh Mock 2
Physics
Wave Motion and Sound
A) 931.5 Hz
Show Explanation
B) 105.7 Hz
Show Explanation
C) 135.9 Hz
Show Explanation
D) 153.1 Hz
Show Explanation
E) 164.9 Hz
Show Explanation

A 100 kg golf ball is moving to the right with a velocity of 20 m/s. It makes a head on collision with an 8 kg steel ball, initially at rest. The two balls get stuck together. What will the velocity of these two balls after collision?

Sindh Mock 2
Physics
Forces and Motion
A) 14.3 m/s
Show Explanation
B) 17.5 m/s
Show Explanation
C) 18.5 m/s
Show Explanation
D) 19.7 m/s
Show Explanation

In an experiment, an object was placed on the principal axis of a convex lens 25 centimetres away from the lens. A real image 4 times the size of the object was obtained. The focal length of the lens is:

Sindh Mock 2
Physics
Optics, Nature of Light and Optical Instruments
Magnifying and Resolving Power of Optical Instruments
A) 20 cm
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B) 25 cm
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C) 33 cm
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D) 50 cm
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Two capacitors C1 (6μF) and C2(12μF) are in series across a 180 volts d.c. supply. Calculate the potential difference across each capacitor (C1 and C2).

Sindh Mock 2
Physics
Electrostatics
A) 98 volts … 32 volts
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B) 120 volts … 60 volts
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C) 68 volts … 96 volts
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D) 30 volts … 65 volts
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Physics is an experimental science which depends heavily on:

Sindh Mock 2
Physics
Dawn of Modern Physics
A) The objective observations
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B) Measurement of natural phenomena
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C) Study of chemical solutions only
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D) Both A and B
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Kelvin, is the unit of thermodynamic temperature, which is ________ of the thermodynamic temperature of the triple point of water.

Sindh Mock 2
Physics
Heat and Thermodynamics
Thermodynamic Scale of Temperature
A) 1/100.6
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B) 1/273.16
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C) 1/32.6
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D) 1/241.6
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When photons are incident on a metal, electrons are emitted. The process is called:

Sindh Mock 2
Physics
Dawn of Modern Physics
A) Photoelectric effect
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B) Pair production
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C) X-ray production
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D) Gamma ray production
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What will be the gravitational force of attraction between two balls each weighing 5 kg when placed at a distance of 0.33 m apart. (G = 6.673 x 10-7 Nm2/kg2)

Sindh Mock 2
Physics
Gravitation
Newton’s Law of Universal Gravitation
A) 9.1 x 10-8N
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B) 7.1 x 10-8N
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C) 6.1 x 10-8 N
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D) 3.5 x 10-8 N
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E) 1.5 x 10-8 N
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A microscope has an objective of 10 mm focal length and eyepiece of 25 mm focal length. What is the distance between the lenses if the object is in sharp focus when it is 10.5 mm from the objective?

Sindh Mock 2
Physics
Optics, Nature of Light and Optical Instruments
Magnifying and Resolving Power of Optical Instruments
A) 232.7 mm
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B) 431.1 mm
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C) 511.9 mm
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D) 711.8 mm
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A 70 kg sportsman runs up a long flight of stairs in 4 seconds. The vertical height of the stairs is 4.5 m. What will be his power output in watts?

Sindh Mock 2
Physics
Work, Power & Energy
A) 7.7 x 10^2 W
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B) 8.8 x 10^3 W
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C) 9.5 x 10^3 W
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D) 10.2 x 10^4 W
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A car starts from rest and moves with constant acceleration. During the 4th second of its motion, it covers a distance of 21 meters. The acceleration of the car is _____ m.

Sindh Mock 2
Physics
Forces and Motion
A) 04
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B) 06
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C) 08
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D) 16
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A gas is enclosed in a container fitted with a piston of cross-sectional area of 0.10 m2. The pressure of the gas is maintained at 8000 N/m2. When heat is slowly transferred, the piston is pushed up through a distance of 4.0 cm. If 42 J heat is transferred to the system during the expansion, what is the change in the internal energy of the system?

Sindh Mock 2
Physics
Heat and Thermodynamics
First Law of Thermodynamics
A) 5 J
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B) 10 J
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C) 20 J
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D) 30 J
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A 20.0 cm wire carrying a current of 10.0 A is placed in a uniform magnetic field of 0.30 T. If the wire makes an angle of 40° with the direction of the magnetic field, find the magnitude of the force acting on the wire? ( sin 40° = 0.642)

Sindh Mock 2
Physics
Magnetism and Electromagnetic Induction
Force on a Current Carrying Conductor in a Uniform Magnetic Field
A) 2.71 N
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B) 0.39 N
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C) 6.61 N
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D) 7.61 N
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X-rays are also known as:

Sindh Mock 2
Physics
Atomic Spectra
Inner Shell Transitions And Characteristic X-rays
A) Rydberg rays
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B) Roentgen rays
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C) Ultraviolet rays
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D) Zig-zag rays
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A generator of e.m.f. 80 V has an internal resistance of 0.04 Ω. If its terminal voltage is 75 V, determine the current.

Sindh Mock 2
Physics
Current Electricity
Electric Current
A) 125 A
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B) 135 A
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C) 145 A
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D) 155 A
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_______ is also known as anti-electron.

Sindh Mock 2
Physics
Dawn of Modern Physics
Pair Production and Annihilation
A) Photon
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B) Proton
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C) Positron
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D) Nucleon
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