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.

PLS Academy

Get Access to 20 thousands+ MCQs Including Topical MCQs, Practice Tests, Mock Tests, Solved Past Papers, Flashcards, Notes, FLPS, and Much More.

UNLOCK PREMIUM🔐

798

Created by Ali Durrani

NET Practice

Chemistry Practice Test 5

This is the Free Access to Limited MCQs. Enroll to PLS Boost Premium Bundle to Get More MCQs HERE

1 / 100

Category: Chemistry Ch 9 Class 12

Boiling point of benzene is:

70.3

80.1

133

79.41

2 / 100

Category: Chemistry Ch 3 Class 11

When Gypsum is heated to about 100° C, it losses some water of crystallization and becomes:

NTS 2011
Chemistry
States of Matter – Gases, Liquids and Solids
s and p Block Elements
Elimination Tool:

A) Epsom salt

B) Kieserite

C) Plaster of Paris

D) Bleaching Powder

3 / 100

Category: Chemistry Ch 5 Class 11

Breaking of neutron produces?

Electron, proton and neutrino

Electron, positron and neutrino

Proton and positron

Alpha particles

4 / 100

Category: Chemistry Ch 4 Class 12

Which of the following has allotropic forms:

Oxygen

Sulphur

Both

None of these

5 / 100

Category: Chemistry Ch 9 Class 12

Acetylene upon heating at 300 C gives:

Benzene

Alkene

Alkane

Alcohol

6 / 100

Category: Chemistry Ch 8 Class 11

If Kc = 1, then reaction is:

At equilibrium

complete

Moves in forward direction

None of these

7 / 100

Category: Chemistry Ch 9 Class 12

C6H5 Is:

Phenyl

Methyl

Ethyl

Hexyl

8 / 100

Category: Chemistry Ch 4 Class 12

The colour of transition metal complexes is due to:

NTS 2019
Chemistry
d and f Block Elements
Elimination Tool:

A) d-d transition of electrons.

B) Paramagnetic nature of transition elements

C) Loss of s-electrons

D) Refraction phenomenon

9 / 100

Category: Chemistry

Q.36 How will the conditions be changed to prevent the volume of the given gas from expanding when its mass is increased

A. Temperature and pressure increased

B. Temperature is lowered and pressure decreased

C. Temperature and pressure increasediiiiiiiiii

D. Temperature is lowered and pressure increased

10 / 100

Category: Chemistry Ch 10 Class 12

Grignard’s reagent on hydrolysis give

) Lower hydrocarbon

Higher hydrocarbon

Alcohols

Alkyl halides

11 / 100

Category: Chemistry Ch 6 Class 11

Geometry of SF6 is:

Octahedral

Hexagonal

Decahedral

Trigonal

12 / 100

Category: Chemistry Ch 7 Class 11

If pressure and volume of a gas are variable while temperature remains constant, this belongs to

PMC Sample 2
Chemistry
Thermochemistry
Elimination Tool:

A) Charles's law

B) Boyle's law

C) Avogadro's law

D) Pascal's law

13 / 100

Category: Chemistry Ch 1 Class 12

Which of the following catalysts is used in the decomposition of laughing gas N2O at 1000 K?

2N2O 2N2 + O2

NTS 2016 SMBBMC
Chemistry
Periodicity in Elements
Elimination Tool:

A) Glycine

B) V2O5

C) Fe

D) Traces of Cl2

14 / 100

Category: Chemistry

Which enzyme is used when sugar In molasses is converted to glucose and fructose?

Amylase

Protease

Sucrase

None of these

15 / 100

Category: Chemistry

Q.23 What is the color of silver acetylide, AgC=CAg?

A. Red

B. White

C. Brown

D. Pinkish

16 / 100

Category: Chemistry Ch 3 Class 11

The unit of viscosity is:

NTS 2012
Chemistry
States of Matter – Gases, Liquids and Solids
Elimination Tool:

A) Joule

B) N/m2

C) Dynes/cm

D) Poise

17 / 100

Category: Chemistry Ch 8 Class 11

18 / 100

Category: Chemistry Ch 1 Class 12

Down’s cell is used to prepare:

NTS 2019
Chemistry
Periodicity in Elements
Elimination Tool:

A) Sodium carbonate

C) Sodium hydroxide

B) Sodium bicarbonate

D) Sodium metal

19 / 100

Category: Chemistry Ch 1 Class 11

In combustion analysis method CO2 is absorbed by?

Mg(OH)2

KOH

Mg(CIO)2

None of thes

20 / 100

Category: Chemistry Ch 9 Class 12

Name the main product formed as a result of the following reaction

H3C – (CH2)5 – CH3 ————> Product

n-heptane

Conditions: 480 – 550 C, 150 – 399 psi V2O5

NTS 2019
Chemistry
Hydrocarbons
Elimination Tool:

A) Benzene

B) Toluene

C) Xylene

D) Cyclohexane

21 / 100

Category: Chemistry Ch 1 Class 11

Which of the following has six isotopes?

PMC Practice 4
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) Manganese

B) Tin

C) Calcium

D) Carbon

22 / 100

Category: Chemistry Ch 6 Class 11

The number of sigma and pi bonds in 1-butene-3-yne?

NUMS 2015
Chemistry
Chemical Bonding
Elimination Tool:

A) 5 sigma and 5 pi

B) 7 sigma and 3 pi

C) 8 sigma and 2 pi

D) 6 sigma and 4 pi

23 / 100

Category: Chemistry Ch 15 Class 12

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

24 / 100

Category: Chemistry

Q.111 Which one is primary alkyl halide?

A. Iso-propyl chloride

B. 2-Chloro-2-methyl propane

C. Neo-pentyl chloride

D. Chloroform

25 / 100

Category: Chemistry

Which of the following has the least electron affinity value?

NUMS Mock 1
Chemistry
Periodicity in Elements

A) 12 C 6

B) 14 N 7

C) 16 8 7

D) 19F 9

26 / 100

Category: Chemistry Ch 1 Class 11

If the number of molecules of different gases are the same at S.T.P., the occupied volume will be _____.

PMC Practice 24
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) Greater

B) Same

C) Smaller

D) Twice

27 / 100

Category: Chemistry Ch 5 Class 11

X-rays are defined as:

NUMS 2020
Chemistry
Atomic Structure
Elimination Tool:

A) Electromagnetic radiations of high mass number

B) Electromagnetic radiations of very high frequency

C) Electromagnetic radiations of high wavelength

D) Electromagnetic radiations of high energy

28 / 100

Category: Chemistry Ch 1 Class 11

In mass spectrometry, ionization occurs in form.

Solid

Liquid

Vapor

No ionization occurs during the process.

29 / 100

Category: Chemistry Ch 1 Class 12

By increasing which of the following factor polarizability increases?

PMC Practice 1
Chemistry
Periodicity in Elements
Elimination Tool:

A) Atomic radius

B) Ionization energy

C) Ionic radius

D) Hydration energy

30 / 100

Category: Chemistry

Q.127 Limiting reactant controls the amount of,

A. Reactant

B. Product

C. Both A &B

D. None of these

31 / 100

Category: Chemistry Ch 16 Class 12

Which one of these Is toxic?

Nitrous oxide

Nitric oxide

Sulphur dioxide

Carbon dioxide

32 / 100

Category: Chemistry

Which of the following substances exhibits hydrogen bonding?

NUMS Mock 4
Chemistry
Chemical Bonding

A) H2S

B) SiH4

C) NH3

D) HI

33 / 100

Category: Chemistry Ch 1 Class 11

Different kinds of atoms of the same element are called isotope having different __________but same ___________ properties.

PMC Practice 1
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) Physical, atomic

B) Physical, chemical

C) Chemical, physical

D) Chemical, atomic

34 / 100

Category: Chemistry Ch 8 Class 12

Which of the following compounds react slower than benzene in electrophilic substitution reaction?

PreMedPK MDCAT Mock 5
Chemistry
Hydrocarbons
Elimination Tool:

A) Nitrobenzene

B) Phenol

C) Aniline

D) Toluene

35 / 100

Category: Chemistry Ch 8 Class 11

For, the reaction:

N2 + 3H2 ⇌ 2NH3

The production of NH3 will be favored at:

NTS 2010
Chemistry
Chemical Equilibrium
Elimination Tool:

A) High pressure and catalyst

B) Low pressure only

C) Low pressure and catalyst

D) High pressure only

36 / 100

Category: Chemistry

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

NUMS Mock 4
Chemistry
Aldehydes and Ketones

A) LiAlH4

B) Zn(Hg)-HCl

C) NaBH4

D) CH3Mgl

37 / 100

Category: Chemistry Ch 1 Class 12

Whidi group has coinage metals?

IIB

IIIA

38 / 100

Category: Chemistry Ch 4 Class 12

What are interstitial compounds?

PMC Sample 2
Chemistry
d and f Block Elements
Elimination Tool:

A) Transition elements containing small proportion of H, B, C, N

B) Transition elements containing small proportion of He, Ne, Ar, Xe

C) The compounds in which transition elements are in their highest oxidation state.

D) The compounds of transition elements which are not stable.

39 / 100

Category: Chemistry Ch 11 Class 12

Which of the following is TRUE regarding Methyl Alcohol?

PreMedPK MDCAT Mock 3
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) It is a colorless, volatile, thin liquid with specific gravity 0.796 at 15°C

B) It is used for low-temperature thermometers and as a fuel substitute

C) It is extensively used in the formation of different beverages

D) It is used as a base for perfumes

40 / 100

Category: Chemistry Ch 2 Class 11

The mechanism of reaction can be understood by

PMC Practice 6
Chemistry
Experimental Techniques in Chemistry
Elimination Tool:

A) Experimental details

B) Balanced chemical equation

C) Molar Ratio

D) All of these

41 / 100

Category: Chemistry Ch 7 Class 11

If a system absorbs heat, the surrounding temperature

Increases

Remains same

Decreases

Decreases then suddenly Increases

42 / 100

Category: Chemistry Ch 7 Class 12

Which of the following is/are organic?

Protein

Carbohydrates

Both a and b

None of these

43 / 100

Category: Chemistry Ch 4 Class 12

Copper reacts with hot concentrated H2SO4 in presence of

Air

Water

Ammonia

Strong heat

44 / 100

Category: Chemistry

The decreasing order of second ionization energy of K, Ca, Ba is:

NUMS Mock 1
Chemistry
Chemical Bonding

A) K > Ca > Ba

B) Ca > Ba > K

C) Ba > K > Ca

D) K > Ba > Ca

45 / 100

Category: Chemistry Ch 15 Class 12

Among the most common disaccharides, one of the following is present in the milk?

UHS 2014
Chemistry
Industrial Chemistry
Elimination Tool:

A) Sucrose

B) Maltose

C) Fructose

D) Lactose

46 / 100

Category: Chemistry Ch 9 Class 11

From a mixture of CO2and H2gases, CO2can be separated by passing the mixture through:

NTS 2013
Chemistry
Solution and Colloids
Elimination Tool:

A) Water at high temperature

B) Water under high pressure

C) Cold water

D) Acidified water

47 / 100

Category: Chemistry Ch 6 Class 11

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

NTS 2010
Chemistry
Chemical Bonding
Elimination Tool:

A) Surface tension

B) Adhesive forces

C) Viscosity

D) Polarity

48 / 100

Category: Chemistry

Q.141 Cholesteryl Benzoate turns milky at

A. 123°C

B. 135°C

C.145C

D.179°C

49 / 100

Category: Chemistry Ch 9 Class 11

An ideal solvent dissolves maximum solute at?

Boiling point

At room temperature

Saturation point

At Freezing point

50 / 100

Category: Chemistry Ch 1 Class 12

According to which phenomenon, “the properties of elements are the periodic function of their atomic number.”

NTS 2012
Chemistry
Periodicity in Elements
Elimination Tool:

A) Mendeleev's periodic law

C) Doberenier's triads

D) Lothar Meyer’s classification

E) Modern periodic law

51 / 100

Category: Chemistry Ch 11 Class 12

With which of the following alcohols do not react to form alkyl halides?

HCl

SOCl2

Br2

PCl3

52 / 100

Category: Chemistry Ch 6 Class 11

Bond energy:

I. is the energy required to break a bond between two atoms in a diatomic molecule

II. Is taken as the energy released in forming a bond form free atoms

III. Is the measure of the strength of bond

NTS 2011
Chemistry
Chemical Bonding
Elimination Tool:

B) I and II only

C) I and IIII only

D) II only

E) I, II and III

53 / 100

Category: Chemistry Ch 12 Class 12

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

NUMS 2016
Chemistry
Aldehydes and Ketones
Elimination Tool:

A) LiAlH4

B) Zn(Hg)-HCl

C) NaBH4

D) CH3MgI

54 / 100

Category: Chemistry Ch 8 Class 11

Common Ion effect is useful application in?

NTS 2015 SMBBMC
Chemistry
Chemical Equilibrium
Elimination Tool:

A) Qualitative salt analysis

B) quantitative salt analysis

C) both A and B

D) none of the above

55 / 100

Category: Chemistry Ch 1 Class 11

Mass of an atom ranges from?

PMC Practice 20
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) 1 x 10-28 kg to 1 x 10-22 kg

B) 1 x 10-26 kg to 1 x 10-23 kg

C) 1 x 10-27 kg to 1 x 10-24 kg

D) 1.6373 x 10-27 kg to 1 x 10-25 kg

56 / 100

Category: Chemistry Ch 4 Class 11

The properties of liquid crystals are intermediate between crystals and:

PMC Practice 3
Chemistry
States of Matter – Gases, Liquids and Solids
Elimination Tool:

A) Anisotropic liquids

B) Nematic liquids

C) Isotropic liquids

D) Liquids

57 / 100

Category: Chemistry Ch 5 Class 11

Quantum number values for ‘2p’ orbitals are:

PMC 2020
Chemistry
Atomic Structure
Elimination Tool:

A) n=2, l=1

B) n=1, l=2

C) n=1, l=0

D) n=2, l=0

58 / 100

Category: Chemistry Ch 6 Class 12

d-d transitions in transition metals gives?

Crystalline structure

characteristic color

Hardness

d) Higher reactivity

59 / 100

Category: Chemistry Ch 5 Class 12

Which of the following is the highest oxidizing agent?

Cl2

Br2

60 / 100

Category: Chemistry Ch 9 Class 12

Physical properties of Ethyne is/are:

NTS 2015 DUHS and JSMU
Chemistry
Hydrocarbons
Elimination Tool:

A) It is colourless gas with a sweet smell.

B) It is sparingly soluble in water.

C) It is less dense than air.

D) It explodes on compression to a liquid because of unstable nature.

E) All of the above

61 / 100

Category: Chemistry

Q.93 Which element has electronic configuration of [Ar]4s1, 3d5

A. Cu

B. Zn

C. Cr

D. V

62 / 100

Category: Chemistry Ch 4 Class 11

Boyle’s law is stated as:”The product of pressure and volume of a fixed amount of gas at constant temperature is a _____ quantity

PMC Sample 3
Chemistry
States of Matter – Gases, Liquids and Solids
Elimination Tool:

A) variable

B) constant

C) discreet

D) decreasing

63 / 100

Category: Chemistry Ch 10 Class 11

Conversion of Electrical energy into chemical energy is

PMC Sample 2
Chemistry
Electrochemistry
Elimination Tool:

A) Mechanical Energy

B) Electromechanical Energy

C) Electrochemistry

D) Chemical Energy

64 / 100

Category: Chemistry Ch 9 Class 11

12% W/W alcohol In water solution contains water:

100 cm3

12 cm3

88 cm3

112 cm3

65 / 100

Category: Chemistry Ch 8 Class 12

Which step should be repeated over and over to get a variety of substituted products?

PreMedPK MDCAT Mock 5
Chemistry
Hydrocarbons
Elimination Tool:

A) None of these

B) Termination

C) Propagation

D) Initiation

66 / 100

Category: Chemistry Ch 6 Class 11

In HF the covalent bond is due to:

NTS 2016 SMBBMC
Chemistry
Chemical Bonding
Elimination Tool:

A) S-S overlapping

B) S-Pz overlapping

C) S-Px overlapping

D) Pz – Pz overlapping

67 / 100

Category: Chemistry Ch 15 Class 12

Which one of the following was used as one of the earliest antiseptic and disinfectants?

UHS 2015
Chemistry
Industrial Chemistry
Elimination Tool:

A) Phenol

B) Ether

C) Ethanol

D) Methanol

68 / 100

Category: Chemistry

Q.136 SN reactions are favored by which of the following reactions?

A. Water

B. Benzene

C. Carbon Tetrachloride

D. Carbon disulphide

69 / 100

Category: Chemistry Ch 8 Class 12

How many chain isomers are shown by C5H12?

PreMedPK MDCAT Mock 4
Chemistry
Hydrocarbons
Elimination Tool:

A) 5

B) 4

C) 3

D) 2

70 / 100

Category: Chemistry Ch 5 Class 11

Which of the following does not have an inert gas configuration?

NUMS 2015
Chemistry
Atomic Structure
Elimination Tool:

A) Na+

B) Cu+

C) K+

D) S2-

71 / 100

Category: Chemistry Ch 9 Class 11

Ca(OH)2 is sparingly soluble having solubility value 6.5 x 10-6. What’ll be its solubility:

UHS 2017 Reconduct
Chemistry
Solution and Colloids
Elimination Tool:

A) 2.75 x 10-2

B) 2.75 x 102

C) 1.17 x 10-2

D) 3.63 x 103

72 / 100

Category: Chemistry Ch 5 Class 11

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

NTS 2010
Chemistry
Atomic Structure
Elimination Tool:

A) 0

B) 1

C) 2

D) 3

73 / 100

Category: Chemistry Ch 1 Class 12

Which of the following has maximum non-metallic character?

PMC Sample 2
Chemistry
Periodicity in Elements
Elimination Tool:

A) F

B) Cl

D) I

C) Br

74 / 100

Category: Chemistry Ch 4 Class 12

In which of the following the oxidation state of S is the highest

SO2

SCl2

H2SO4

H2S03

75 / 100

Category: Chemistry Ch 15 Class 12

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

76 / 100

Category: Chemistry Ch 2 Class 12

Which one of the following is a common mineral of calcium? a

Feldspar

Limestone

Diamond

None of these

77 / 100

Category: Chemistry Ch 3 Class 11

950 torr corresponds to:

NTS 2010
Chemistry
States of Matter – Gases, Liquids and Solids
Elimination Tool:

A) 3.5 atm

B) 1 atm

C) 3 atm

D) 1.25 atm

78 / 100

Category: Chemistry Ch 8 Class 12

Which metal is used to form alkanes from alkyl halides?

Both a and b

None of these

79 / 100

Category: Chemistry Ch 4 Class 11

Which of the following bonds Is the weakest?

Ionic

Covalent

Dative Covalent

Hydrogen bonding

80 / 100

Category: Chemistry Ch 2 Class 12

To avoid the formation of toxic compounds with chlorine, which substance is used for disinfecting water?

NUMS 2016
Chemistry
s and p Block Elements
Elimination Tool:

A) KMnO4

B) Chloramines

C) O3

D) Alums

81 / 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

82 / 100

Category: Chemistry Ch 7 Class 11

Formation of carbon dioxide hinders in calculating the heat of formation of:

PMC Practice 1
Chemistry
Thermochemistry
Elimination Tool:

A) CCl4

B) O3

C) CO

D) C

83 / 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

84 / 100

Category: Chemistry Ch 1 Class 11

To find the number of molecules in a given compound which of the following is employed?

Chromatography

Le-Chatelier's principle

None of thes

85 / 100

Category: Chemistry Ch 7 Class 12

Proton transfer within a molecule is known as:

Position isomerism

Tautomerism

Metamerism

Isomerism

86 / 100

Category: Chemistry Ch 2 Class 12

Melting point of Group I-A elements is than Group II-A elements

Higher

lower

Same

Varies

87 / 100

Category: Chemistry Ch 11 Class 12

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

NTS 2011
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) Carbon dioxide

B) Formaldehyde

C) Acetaldehyde

D) Ketone

88 / 100

Category: Chemistry

The major source of unburnt hydrocarbons in the atmosphere is / are:

NUMS Mock 1
Chemistry
Hydrocarbons

A) Petroleum

B) Natural gas

C) Automobiles

D) Human beings

89 / 100

Category: Chemistry Ch 4 Class 11

Carbon dioxide is an Example of?

PMC Practice 4
Chemistry
States of Matter – Gases, Liquids and Solids
Elimination Tool:

A) Ionic Solid

B) Metallic Solid

C) Molecular Solid

D) Covalent Solid

90 / 100

Category: Chemistry Ch 14 Class 12

A polymer called Bakelite is formed by the reaction of phenol with:

PMC Practice 2
Chemistry
Macromolecules
Elimination Tool:

A) Hydrogen

B) Ethers

C) Carboxylic acid

D) Formaldehyde

91 / 100

Category: Chemistry Ch 9 Class 12

Which one of the following is not a heterocyclic compound?

PMC Sample 3
Chemistry
Hydrocarbons
Elimination Tool:

A) Thiophene

B) Anthracene

C) Furan

D) Pyrrole

92 / 100

Category: Chemistry Ch 4 Class 11

Which of the following solids is isotropic?

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

A) Ionic solids

B) Molecular solids

C) Amorphous solids

D) Metallic solids

93 / 100

Category: Chemistry Ch 13 Class 12

What is correct order of acidic strength?

Carboxylic acid > alcohols > phenol > water

Carboxylic acid > phenol > water > alcohol

Water > alcohol > carboxylic acid > phenol

Phenol > alcohol > water > carboxylic acid

94 / 100

Category: Chemistry Ch 5 Class 12

From the following which is used as bleaching agent

Flourine

Chlorine

Bromine

Iodine

95 / 100

Category: Chemistry Ch 2 Class 11

What volume in dm3 of KCl is obtained in the following equation if the volume of KCIO3 at the beginning of the reaction is 20 dm3?

2KClO3 -> 2KCl + 3O2

NTS 2016 DUHS & JSMU
Chemistry
Stoichiometry
Elimination Tool:

B) 74.5 dm3

C) 50 dm3

D) 40 dm3

E) 20 dm3

96 / 100

Category: Chemistry Ch 7 Class 11

Two rocket fuels below are determined by their high performance.

N2H4(l) + O2(g) -> N2(g) + 2H2O(l) ΔH= -632 kJ

H2 (g) + ½ O2(g) -> H2O(l) ΔH = -286 kJ

If equal masses of hydrazine and hydrogen are used, which of the following has better performance?

NUMS 2019 Cancelled
Chemistry
Thermochemistry
Elimination Tool:

A) Hydrazine

B) Both have equal enthalpy of formation

C) Hydrogen gas

D) Cannot be compared

97 / 100

Category: Chemistry Ch 9 Class 12

How many Dewar Structure of Benzene are present?

Infinite

98 / 100

Category: Chemistry Ch 4 Class 12

H3PO3 is

Weak reducing agent

Strong reducing agent

Strong oxidizing agent

Weak oxidizing agent

99 / 100

Category: Chemistry Ch 13 Class 12

The reaction CHCH + H2O + 3(O) shows the formation of ________.

NUMS 2018
Chemistry
Carboxylic Acids and its Derivatives
Elimination Tool:

A) Acetic acid

B) Picric acid

C) Oxalic acid

D) Formic acid

100 / 100

Category: Chemistry Ch 10 Class 12

Ethyl iodide and n-propyl iodide are allowed to undergo Wurtz reaction. The alkane which will not be obtained in this reaction is:

NUMS 2016
Chemistry
Alkyl Halides and Amines
Elimination Tool:

A) butane

B) propane

C) pentane

D) hexane

Your score is

The average score is 55%

Structured Practice for Best Entry Test Preparation

This topic-wise and chapter-wise practice test allows students to focus on individual chemistry concepts, numerical problems, reactions, and practical exercises. Regular practice enhances understanding, sharpens problem-solving abilities, and builds confidence to tackle both board and competitive exam questions efficiently.

Free Resources for Best Entry Test Preparation

Students can access free Chemistry Practice Test 5 to systematically improve knowledge, calculation skills, and problem-solving abilities. This test is suitable for FSC Board Exams as well as major entry tests, helping students perform better in the chemistry section. PLS Academy provides these resources to support students in their preparation.

JazakAllah