Chemistry Practice Tests 5 - PLS Academy

Chemistry Practice Test 5

Chemistry Practice Test 5 is designed to help students strengthen their understanding of key chemistry concepts, formulas, and reactions for competitive entry tests like MDCAT, NUMS, AKU, UET, ECAT, NTS, as well as FSC Board Exams. This test covers topics from thermodynamics, chemical equilibrium, coordination compounds, and practical applications, helping students improve accuracy and problem-solving skills.

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Chemistry Practice Test 5

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1 / 100

Category: Chemistry

Q3___________is a macromolecule found in bold?

A. Hemoglobin

B. Plasma

C. creatinine

D. plasmids

2 / 100

Category: Chemistry Ch 14 Class 12

The transparent plastic used to make combs and hairbrushes is called:

NTS 2018
Chemistry
Macromolecules
Elimination Tool:

A) PVA

B) PVC

C) Bakelite

D) Perspex

3 / 100

Category: Chemistry Ch 4 Class 11

Which of the following is an assumption of the kinetic model of an ideal gas?

PMC Practice 6
Physics
States of Matter – Gases, Liquids and Solids
Elimination Tool:

A) Gas is at high pressure

B) Collision between particles are elastic

C) There are weak forces of attraction between particles in gas

D) Total energy of particles is proportional to the temperature

4 / 100

Category: Chemistry Ch 4 Class 11

When animals inhale air, oxygen will move into the lungs due to difference in partial pressure of oxygen in lungs and atmosphere. This obeys

PMC Sample 1
Chemistry
States of Matter – Gases, Liquids and Solids
Elimination Tool:

A) Pascal's law

B) Dalton's law

C) Charles's law

D) Bohr's law

5 / 100

Category: Chemistry Ch 9 Class 12

Which of the following statements is incorrect about benzene?

All of the carbon atoms are sp hybridized.

The carbon-carbon bond lengths are all the same.

It has delocalized electrons.

The carbon-hydrogen bond lengths are all the same.

6 / 100

Category: Chemistry Ch 11 Class 11

For which of the following order of the reaction, rate of reaction is inversely proportional to the concentration reaction?

PMC 2020
Chemistry
Reaction Kinetics
Elimination Tool:

A) 1st order reaction

B) 2nd order reaction

C) Negative order of reaction

D) Zero order of reaction

7 / 100

Category: Chemistry Ch 11 Class 12

Phenol reacts with CH3COCl to give:

NUMS 2019 Reconduct
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) Acid

B) Ester

C) Alcohol

D) Aldehyde

8 / 100

Category: Chemistry Ch 1 Class 12

Triads were introduced by

Newland

Dobreiner

Mendeleev

Al-Razi

9 / 100

Category: Chemistry Ch 13 Class 12

Carboxylic acids form dimers due to _________.

PMC Practice 3
Chemistry
Carboxylic Acids and its Derivatives
Elimination Tool:

A) Small sizes

B) Polarity of C-O bond

C) H-bonding

D) Dipole-Dipole interactions

10 / 100

Category: Chemistry

Alkenes undergo:

NUMS Mock 2
Chemistry
Hydrocarbons

A) Electrophilic Addition

B) Electrophilic substitution

C) Nucleophilic substitution

D) Nucleophilic addition

11 / 100

Category: Chemistry Ch 8 Class 11

The value K for H2(g) + CO2(g) H2O(g) + CO(g) is 1.80 at 1000 C. If 1.0 mole of each H2 and CO2 are placed in 1 litre flask, the final equilibrium concentration of CO at 1000 C will be:

NTS 2017
Chemistry
Chemical Equilibrium
Elimination Tool:

A) 0.295 M

B) 0.385 M

C) 0.531 M

D) 0.473 M

12 / 100

Category: Chemistry

Q.146 a liquid crystalline state exist between two temperatures I-e melting temperature and temperature

A. Boiling

B. Freezing

C. Clearing

D. All of these

13 / 100

Category: Chemistry Ch 1 Class 12

Covalent character of hydrides decrease ________?

PMC Practice 1
Chemistry
Periodicity in Elements
Elimination Tool:

A) Down the Group

B) Along period

C) Along d- block

D) All of these

14 / 100

Category: Chemistry Ch 11 Class 11

The colour of methyl orange in base is?

NTS 2015 SMBBMC
Chemistry
Acids, Bases and Salts
Elimination Tool:

A) Red

B) yellow

C) orange

D) pink

15 / 100

Category: Chemistry

Q.131 BH3 has a geometry with H-B-H bond angles of 12

A. Linear

B. Tringonal planar

C. Tetrahedron

D. Bent

16 / 100

Category: Chemistry Ch 5 Class 11

The maximum number of electrons in an atom with n=3 and l=2 is:

NUMS 2015
Chemistry
Atomic Structure
Elimination Tool:

A) 10

B) 6

C) 18

D) 0

17 / 100

Category: Chemistry Ch 11 Class 11

The rate of reaction:

PMC Sample 2
Chemistry
Reaction Kinetics
Elimination Tool:

A) Increases as the reaction proceeds

B) Decreases as the reaction proceeds

C) Remains unchanged

D) None of these options is correct

18 / 100

Category: Chemistry Ch 2 Class 11

2 grams of H2 molecules contain ______ molecules.

NTS 2012
Chemistry
Stoichiometry
Elimination Tool:

A) 12.04 x 1023

B) 6.02 x 1023

C) 3.01 x 1023

D) 1.008

19 / 100

Category: Chemistry Ch 5 Class 11

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

NTS 2013
Chemistry
Atomic Structure
Elimination Tool:

A) Ionization Energy

B) Electron Affinity

C) Electronegativity

D) Atomic Radius

20 / 100

Category: Chemistry Ch 3 Class 11

All the gasses at 212.44 cm3 have

Same mass

Different mass

Can't be predicted

None of these

21 / 100

Category: Chemistry Ch 10 Class 11

Two half cells of a galvanic cell are connected with a salt bridge, the electrons flow from:

Anode to cathode through external circuit

Cathode to anode through external circuit

Anode to cathode through salt bridge

Cathode to anode through salt bridge

22 / 100

Category: Chemistry Ch 4 Class 12

The formula of Chile Peter salt is

NaCI

NaNO3

NaOH

NaNO4

23 / 100

Category: Chemistry Ch 6 Class 11

Second Ionization energy of M atom

Higher than first ionization energy

Lower than first ionization energy

Very low

None of these

24 / 100

Category: Chemistry Ch 5 Class 11

J.J Thomson determined the:

NTS 2016 DUHS & JSMU
Chemistry
Atomic Structure
Elimination Tool:

A) Charge of an electron

B) Mass of an electron

C) e/m value of an electron

D) Charge of a proton

25 / 100

Category: Chemistry Ch 3 Class 12

Solubility of Borax decahydrate at 100C is

63 grams

113 grams

99.3 grams

58.5 grams

26 / 100

Category: Chemistry Ch 9 Class 11

Which one of the following statements is incorrect?

NUMS 2018
Chemistry
Solution and Colloids
Elimination Tool:

A) A solution freezes at a lower temperature than the pure solvent

B) A solution boils at a higher temperature than the pure solvent.

C) 0.1 M NaCl solution and 0.1 m sugar solution have the same boiling point

D) Osmosis cannot take place without a semi-permeable membrane.

27 / 100

Category: Chemistry Ch 10 Class 12

Catalyst used in reaction CHCl3+ ½ O2→ COCl2+ HCl is ________ and its nature is _______.

NTS 2014
Chemistry
Alkyl Halides and Amines
Elimination Tool:

A) 5% methyl alcohol … negative

B) 2% Ethyl alcohol … negative

C) V2O5… positive

D) Al2O3….. negative

28 / 100

Category: Chemistry Ch 14 Class 12

Fe’ 2 + is a cofactor of:

Chrome oxidase

Glucose 6-phosphatase

Carbonic anhydrase

Both a and b

29 / 100

Category: Chemistry Ch 3 Class 12

Prussian blue is:

NUMS 2014
Chemistry
d and f Block Elements
Elimination Tool:

A) K2Fe[FeCN6]

B) K4[FeCN6]

C) Fe4[Fe(CN)6] 3xH2O

D) K3FeCN6

30 / 100

Category: Chemistry Ch 12 Class 12

In which of the following reaction alkyl ketones are converted Into carboxylic acid with one carbon atom less than the parent compound?

Haloform

Cannizzaro

Aldol

None

31 / 100

Category: Chemistry Ch 12 Class 12

Phenylmethyl ketone can be converted into ethyl benzene in one step by using:

PreMedPK MDCAT Mock 2
Chemistry
Aldehydes and Ketones
Elimination Tool:

A) LiAlH4

B) Zn(Hg)-HCl

C) NaBH4

D) CH3MgI

32 / 100

Category: Chemistry Ch 10 Class 12

Alcbhols react with aqueous acid to produce alkyl halides in presence of

ZnCl2

SO2

Pyridine

KOH

33 / 100

Category: Chemistry

Sodium Benzoate on reacting with soda lime forms:

NUMS Mock 4
Chemistry
Carboxylic Acids and its Derivatives

A) Benzoic Acid

B) Benzene

C) Toluene

D) Benzaldehyde

34 / 100

Category: Chemistry Ch 15 Class 12

Which of the following is not a primary pollutant of the troposphere?

NUMS 2019 Cancelled
Chemistry
Environmental Chemistry
Elimination Tool:

A) Carbon dioxide

B) Sulfur dioxide

C) Carbon monoxide

D) Ammonia

35 / 100

Category: Chemistry

The influence of temperature on reaction rate is predicted by:

NUMS Mock 1
Chemistry
Reaction Kinetics

A) Free energy change

B) Van Der Waals equation

C) Arrhenius equation

D) Kinetic equation

36 / 100

Category: Chemistry

Q.95 250cm3 of a hypothetical gas is cooled from 127°C to –73°C by maintaining the pressure constant. The new volume of the gas at low temperature is

A. 0.25dm3

B. 125 cm3

C. 1.25dm3

D. 250cm3

37 / 100

Category: Chemistry Ch 10 Class 12

Pick correct pair about the difference between E1 and E2 mechanism of methyl bromide forming an alkene.

NUMS 2019 Cancelled
Chemistry
Alkyl Halides and Amines
Elimination Tool:

A) E1 mechanism- strong base and alkyl halide, E2 Mechanism- weak base and alkyl halide

B) E1 mechanism- weak base and alkyl halide, E2 mechanism- strong base and alkyl halide

C) E1 mechanism- strong base and alkyl halide, E2 mechanism- strong base and alkyl halide

D) E1 mechanism- weak base and alkyl halide, E2 mechanism- weak base and alkyl halide

38 / 100

Category: Chemistry

Q.89 Iftwo substituents are present at 1,4 positions then the isomer is called As____________?

A. Ortho

B. Meta

C.Para

D.None of these

39 / 100

Category: Chemistry Ch 3 Class 12

A six-coordinate complex of formula CrCl3.6H2O has green color. A 0.1 M solution of the complex, when treated with an excess of AgCl, gave 28.7 g of a white precipitate. The formula of the complex would be___________.

NUMS 2019 Cancelled
Chemistry
d and f Block Elements
Elimination Tool:

A) [Cr(H2O)6]Cl3

B) [Cr(H2O)5Cl]Cl2.2H2O

C) [Cr(H2O)4Cl2]Cl.2H2O

D) [Cr(H2O)3Cl3].3H2O

40 / 100

Category: Chemistry

Salts of weak bases react with strong acids to give a/an

NUMS Mock 1
Chemistry
Acids, Bases and Salts

A) Basic solution

B) Acidic solution

C) Neutral solution

D) None

41 / 100

Category: Chemistry Ch 14 Class 12

Which of following Is poison for catalyst:

Sulphur

Arsenic

Al203

Both a and b

42 / 100

Category: Chemistry Ch 2 Class 11

22.4 dm3 of volume of each H2 and O2 are sparked to produce water vapours (considered as ideal gas) on completion of reaction. What is the decrease in the volume of the vessel?

NTS 2016 SMBBMC
Chemistry
Stoichiometry
Elimination Tool:

A) 44 dm3

B) 22.4 dm3

C) 33.6 dm3

D) 11.2 dm3

43 / 100

Category: Chemistry

The spectrum of He is expected to be similar to that of:

NUMS Mock 4
Chemistry
Atomic Structure

A) Hydrogen

B) Sodium

C) Oxygen

D) Li+

44 / 100

Category: Chemistry Ch 10 Class 12

Which catalyst is used in the preparation of alkyl halide from alcohols?

PMC Sample 2
Chemistry
Alkyl Halides and Amines
Elimination Tool:

A) Zinc chloride

B) Pyridine

C) Sodium chloride

D) Thionyl chloride

45 / 100

Category: Chemistry Ch 1 Class 12

Whidi group has coinage metals?

IIB

IIIA

46 / 100

Category: Chemistry Ch 1 Class 12

The ionization energy increases from left to right in a period due to increase in?

PMC Practice 1
Chemistry
Periodicity in Elements
Elimination Tool:

A) Nuclear charge

B) Number of electrons

C) Atomic number

D) All of these

47 / 100

Category: Chemistry Ch 14 Class 12

Polymerization of ethene produces which of the following polymers?

PMC Practice 3
Chemistry
Macromolecules
Elimination Tool:

A) Polyvinyl

B) Polethyl

C) Polyethylene

D) Polyethoxy

48 / 100

Category: Chemistry Ch 5 Class 11

“In an atom no two electrons can have the some set of four Quantum numbers” is stated by:

NTS 2013
Chemistry
Atomic Structure
Elimination Tool:

A) Heisenberg’s uncertainty principle

B) Aufbau Principle

C) Pauli's Exclusion principle

D) Hund's Rule

49 / 100

Category: Chemistry Ch 15 Class 12

Percentage of nitrogen by volume in air is:

UHS 2018
Chemistry
Environmental Chemistry
Elimination Tool:

A) 78%

B) 50%

C) 20%

D) 98%

50 / 100

Category: Chemistry Ch 6 Class 11

The hybridization of atomic orbitals of N2+, NO3-, and NH4+are, respectively:

NTS 2015 DUHS and JSMU
Chemistry
Chemical Bonding
Elimination Tool:

A) Sp, sp2, sp3

B) Sp, sp3, sp2

C) Sp2, sp, sp3

D) Sp2, sp3, sp

51 / 100

Category: Chemistry Ch 10 Class 11

Current in electrolysis is carried through:

PMC Sample 3
Chemistry
Electrochemistry
Elimination Tool:

A) Free electrons

B) Positive Ions

C) Negative Ions

D) Both B and C

52 / 100

Category: Chemistry

Which of the following has the highest electrical conductivity?

NUMS Mock 2
Chemistry
Solution and Colloids

A) Aqueous sugar solution

B) Solid graphite

C) Solid sodium chloride

D) Gaseous carbon dioxide

53 / 100

Category: Chemistry Ch 13 Class 12

Which of the following is an example of Monocarboxylic acid?

PMC Sample 2
Chemistry
Carboxylic Acids and its Derivatives
Elimination Tool:

A) Oxalic acid

B) Methanoic acid

C) Glutaric acid

D) Adipic acid

54 / 100

Category: Chemistry

The reduction of nitrile produced a compound of formula C3H7NH2. Which one of the following compounds would be produced if the same nitrile was hydrolyzed by heating with dilute hydrochloric acid?

NUMS Mock 4
Chemistry
Alkyl Halides and Amines

A) CH3CONH2

B) CH3CH2NH2

C) (CH3)2CHCO2H

D) CH3CH2CO2H

55 / 100

Category: Chemistry Ch 15 Class 12

What is formed by a series of complex reactions of ozone with water in the troposphere that are driven by sunlight?

NUMS 2019 Cancelled
Chemistry
Environmental Chemistry
Elimination Tool:

A) O radical

B) H radical

C) OH radical

D) H3O radical

56 / 100

Category: Chemistry Ch 4 Class 12

Copper reacts with hot concentrated H2SO4 in presence of

Air

Water

Ammonia

Strong heat

57 / 100

Category: Chemistry Ch 15 Class 12

What is the nature of “hydrated tricalcium aluminate” (3 Ca. Al203. 6 H20) in the setting of cement?

) Hardened mass

Hardened Gel

Colloidal Gel

Liquid

58 / 100

Category: Chemistry

The number of amino acids found in proteins that a human body can synthesize is:

NUMS Mock 1
Chemistry
Macromolecules

A) 12

B) 10

C) 5

D) 14

59 / 100

Category: Chemistry Ch 10 Class 12

Elimination from 2 – bromobutane results in:

NUMS 2018
Chemistry
Alkyl Halides and Amines
Elimination Tool:

A) Equimolar mixture of 1 and 2 – butene

B) Predominantly 2 – butene

C) Predominantly 1- butane

D) 2 – butyne

60 / 100

Category: Chemistry Ch 7 Class 11

For a chemical reaction A + B, the threshold energy of the reaction is 31 KJ/mole. The average internal energy of A is 12 KJ/mole. What will be the activation energy of A?

NUMS 2018
Chemistry
Thermochemistry
Elimination Tool:

A) 43 KJ/mole

B) 37 KJ/mole

C) 25 KJ/mole

D) 19 KJ/mole

61 / 100

Category: Chemistry Ch 1 Class 11

0.5 mole of SO2 contains gram of oxygen?

None

62 / 100

Category: Chemistry Ch 14 Class 12

PVC is created from which halogen

63 / 100

Category: Chemistry Ch 10 Class 11

In Lead-Acid battery, product formed at anode during discharging is

PbSO4

SO2

SO4

64 / 100

Category: Chemistry Ch 3 Class 12

Impurities of lead in silver are removed by:

NUMS 2016
Chemistry
d and f Block Elements
Elimination Tool:

A) Parke’s process

B) Solvay process

C) Cyanide process

D) Amalgamation process

65 / 100

Category: Chemistry Ch 4 Class 11

Vapor pressure depends on:

Intermolecular forces

Quantity of liquid

Site of the molecules

Surface area

Both a and d

66 / 100

Category: Chemistry Ch 1 Class 12

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

UHS 2019
Chemistry
Periodicity in Elements
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

67 / 100

Category: Chemistry Ch 15 Class 12

Urea is the most widely used nitrogen fertilizer in Pakistan. Its composition is:

UHS 2015
Chemistry
Environmental Chemistry
Elimination Tool:

A) NH2CO

B) N2H5CO2

C) N2H4CO2

D) N2H4CO

68 / 100

Category: Chemistry Ch 15 Class 12

Which of the following is a Marco-nutrient

Boron

Copper

Iron

Nitrogen

69 / 100

Category: Chemistry

Q.144 Carboxylic acids form dimer due to

A. Small Sizes

B. Polarity of C-O bond

C.H-bonding

D. Dipole-Dipole interactions

70 / 100

Category: Chemistry Ch 10 Class 11

Which of the following statements about the reaction given below are correct.

IO3-(aq) + 2I-(aq) + 6H+(aq) + 6Cl-(aq) -> 3ICl2-(aq) + 3H2O(l)

NUMS 2018
Chemistry
Electrochemistry
Elimination Tool:

A) The oxidation number of iodine in the iodate ion,IO3-(aq), changes from +5 to +1

B) The oxidation number of iodine in the iodide ion I-, changes from -1 to +2

C) The oxidation number of chlorine in the iodide ion I- , changes from -1 to -2

D) Iodate ions are oxidized

71 / 100

Category: Chemistry Ch 4 Class 11

Which of the following properties does not belong to Gases?

PMC Practice 5
Chemistry
States of Matter – Gases, Liquids and Solids
Elimination Tool:

A) Indefinite volume

B) Indefinite shape

C) Low density

D) Strong interactions

72 / 100

Category: Chemistry Ch 3 Class 11

Pressure remaining constant, at which temperature volume of gas will become twice to the volume at 0 C?

NUMS 2020
Chemistry
States of Matter – Gases, Liquids and Solids
Elimination Tool:

A) 546 C

B) 200 C

C) 546 K

D) 273 K

73 / 100

Category: Chemistry Ch 5 Class 12

What is the chief ore of fluorine?

Cryolite

Fluorspar

Dolomite

Both a and b

74 / 100

Category: Chemistry Ch 10 Class 12

Reaction by Grignard reagent are mostly

Exothermic

Endothermic

Room temperature

Is highly reactive by both endothermic and exothermic

75 / 100

Category: Chemistry

Q.114 On which of the following factors Hydration Energy depend?

A Charge to size ratio

B. Polarizability of anions

C. Polarization power of Cations

D. All of these

76 / 100

Category: Chemistry Ch 2 Class 12

Which of the following has the highest value of electronegativity?

PMC 2020
Chemistry
s and p Block Elements
Chemical Bonding
Elimination Tool:

A) I

B) Br

C) Cl

D) F

77 / 100

Category: Chemistry Ch 11 Class 12

Which of following is an example of electrophilic attack on alcohols?

PMC Practice 1
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) C2H5OH + CH3COOH → CH3COOC2H5 + H2O

B) 2C2H5OH+2Na→ 2CH5ONa+H2

C) C2H5OH + HCl → C2H5Cl + H2O

D) Both A and B

78 / 100

Category: Chemistry Ch 16 Class 12

Function of ozone Is?

To filter UV radiations

Act as a reducing agent

Act as an antibiotic

None of these

79 / 100

Category: Chemistry Ch 12 Class 12

Carbonyl group undergoes:

NUMS 2019 Reconduct
Chemistry
Aldehydes and Ketones
Elimination Tool:

A) Electrophilic addition reaction

B) Nucleophilic addition reaction

C) Electrophilic substitution reaction

D) Nucleophilic substitution reaction

80 / 100

Category: Chemistry Ch 6 Class 11

Hybridization in BeCl2 Is a

sp3 hybridization

sp2 hybridization

sp hybridization

None of these

81 / 100

Category: Chemistry

In this reaction NH4* + H2O -> H3O*, the conjugate base of H3O+ ion is:

NUMS Mock 3
Chemistry
Chemical Equilibrium

A) NH4+

B) H2O

C) H*

D) NH3

82 / 100

Category: Chemistry Ch 7 Class 11

Which of the following condition is constant in Bomb calorimeter?

PMC Practice 1
Chemistry
Thermochemistry
Elimination Tool:

A) Pressure

B) Volume

C) Temperature

D) All of these

83 / 100

Category: Chemistry Ch 12 Class 12

In the addition of sodium bisulfite to carbonyl system, which of the following is a nucleophile?

PreMedPK MDCAT Mock 3
Chemistry
Aldehydes and Ketones
Elimination Tool:

A) Sulphide ion

B) Sulfite ion

C) Hydride ion

D) Sodium ion

84 / 100

Category: Chemistry

Q.94 Which of the foloving is a strong acia?

A. Ethane

B. Ethyl Chloride

C. Ethanol

D. Pheno

85 / 100

Category: Chemistry Ch 6 Class 11

The number of bond(s) between carbon and nitrogen atoms in a Nitrile is:

NTS 2018
Chemistry
Chemical Bonding
Elimination Tool:

A) One sigma and one pi

B) Two sigma and one pi

C) Only sigma

D) One sigma and two pi

86 / 100

Category: Chemistry Ch 13 Class 12

Which of the following is used as coagulation for latex in rubber industry

Acetic acid

Amino acid

Ethyl alcohol

Rayon

87 / 100

Category: Chemistry Ch 10 Class 11

Oxidation is defined as:

) loss of electron

Gain of electron

Gain of oxygen

Both a and c

88 / 100

Category: Chemistry Ch 10 Class 12

Order of the reactivity of halogens during halogenation of alkanes is:

NUMS 2019 Reconduct
Chemistry
Alkyl Halides and Amines
Elimination Tool:

A) Cl2 > I2 > Br2

B) Br2 > I2 > Cl2

C) I2 > Cl2 > Br2

D) Cl2 > Br2 > I2

89 / 100

Category: Chemistry Ch 8 Class 11

For the following exothermic reaction, a decrease in temperature will shift the equilibrium towards: 2NO (g) + O2(g) -> 2NO2 (g)

NTS 2018
Chemistry
Chemical Equilibrium
Elimination Tool:

A) Left

B) The point of equilibrium

C) Both directions

D) Right

90 / 100

Category: Chemistry Ch 13 Class 12

Amino acids are prepared by?

Suckers synthesis

Dow's method

h) Williamson's synthesis

Sabatier-Sendern's synthesis

91 / 100

Category: Chemistry Ch 8 Class 11

A solution has pH of 10. What is the value of [OH-]?

10^4

10^-4

10^6

10^-6

92 / 100

Category: Chemistry

Q.32 vapor pressure is measured by calculating difference in liquid pressure and

A mercury pressure

B. glass pressure

C. atmospheric pressure

D. container pressure

93 / 100

Category: Chemistry Ch 5 Class 11

The relationship between quantum number n and l is:

PMC 2020
Chemistry
Atomic Structure
Elimination Tool:

A) n = l – 1

B) l = n – 2

C) l = n – 1

D) n = l – 2

94 / 100

Category: Chemistry

Q.142 In the production of wrought iron Mg Si and P are removed in the form of

A. Oxides

B. Silicates

C. Slag

D. Carbonates

95 / 100

Category: Chemistry Ch 13 Class 12

High molecular mass organic compounds, upon hydrolysis yield amino acids are called _______.

PMC Sample 3
Chemistry
Carboxylic Acids and its Derivatives
Elimination Tool:

A) Carbohydrates

B) Lipids

C) Proteins

D) DNA

96 / 100

Category: Chemistry Ch 15 Class 12

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

97 / 100

Category: Chemistry Ch 9 Class 11

The temperature at which one crystalline form changes to other is called ___ temperature

PMC Sample 3
Chemistry
Solution and Colloids
Elimination Tool:

A) critical

B) absolute

C) transition

D) none of these

98 / 100

Category: Chemistry Ch 2 Class 12

For Alkali Metals, decrease in the ionization potential is because of the increasing:

Charge on the nucleus

) Distance between nucleus and outer most electron

Size of the atom

None of these

99 / 100

Category: Chemistry Ch 4 Class 12

Which one of the following does not have allotropes?

100 / 100

Category: Chemistry Ch 12 Class 12

Paraldehyde is formed by:

Formaldehyde

Acetaldehyde

Acetone

None of these

Your score is

The average score is 55%

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