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 Ch 6 Class 11

Hybridization in BeCl2 Is a

sp3 hybridization

sp2 hybridization

sp hybridization

None of these

2 / 100

Category: Chemistry

Q.80 According to Bohr the orbits in which electrons revolve around the nucleus are

A. Oval

B. Elliptical

C. Cylindrical

D. Circular

3 / 100

Category: Chemistry Ch 10 Class 11

CH3Cl + Cl2 —-> CH2Cl2 + HCl is an example of ?

NTS 2015 SMBBMC
Chemistry
Electrochemistry
Elimination Tool:

A) Oxidation reduction

B) Addition reaction

C) Substitution reaction

D) Autoxidation reaction

4 / 100

Category: Chemistry

Water in solution acts as?

Acid

Base

May be acid or base

None of these

5 / 100

Category: Chemistry Ch 15 Class 12

The temperature zones In rotary kilns are:

None of these

6 / 100

Category: Chemistry

Which of the following is the correct order of increasing boiling point?

NUMS Mock 1
Chemistry
Alcohol, Phenols, and Ethers

A) Methanol > Ethanol

B) Methanol < Ethanol

C) Methanol = Ethanol

D) None of these

7 / 100

Category: Chemistry

Why is water added after the reduction process of aldehyde and ketone with LiAlH4?

NUMS Mock 4
Chemistry
Aldehydes and Ketones

A) Because water reacts violently with LiAlH4

B) Because water will protonate LiAlH4

C) Because water inhibits the process

D) Because it will result to alkenes

8 / 100

Category: Chemistry Ch 3 Class 12

The formula of cryolite is

Na2AIF6

Na3AIF3

Na3AIF6

Na2AlCl6

9 / 100

Category: Chemistry

Q.39 Which one of the following enthalpy change is always exothermic in nature?

A. Enthalpy of combustion

B. Enthalpy of solution

C. Enthalpy of formation

D. Enthalpy of atomization

10 / 100

Category: Chemistry Ch 4 Class 11

Liquid in the container has a temperature 70°C. What will be the temperature on the Kelvin scale?

UHS 2018
Chemistry
States of Matter – Gases, Liquids and Solids
Elimination Tool:

A) 350 K

B) 343 K

C) 300 K

D) 283 K

11 / 100

Category: Chemistry Ch 13 Class 12

Which of the following is the strongest acid?

PMC 2020
Chemistry
Carboxylic Acids and its Derivatives
Elimination Tool:

A) Propanoic acid

B) Fluoroethanoic acid

C) Trichloroethanoic acid

D) Nitroethanoic acid

12 / 100

Category: Chemistry Ch 14 Class 12

Polymer having a characteristics odour and mostly used as an adhesive material is

Polyvinyl chloride

Poly styrenec

Ploride

Polyvinyl acetate

13 / 100

Category: Chemistry Ch 15 Class 12

The yellowish-brown color in photochemical smog is due to the presence of:

UHS 2013
Chemistry
Environmental Chemistry
Elimination Tool:

A) Sulphur dioxide

B) Carbon monoxide

C) Carbon dioxide

D) Nitrogen dioxide

14 / 100

Category: Chemistry Ch 3 Class 12

Which of the following elements of Group 3 is non-metallic in character?

15 / 100

Category: Chemistry

Q.16 Actual yield is always less than theoretical yield due to

A. Operational losses

B. reaction reversibility

C. side reaction

D. all of these

16 / 100

Category: Chemistry Ch 10 Class 11

During oxidation process, oxidation number of an element:

PMC 2020
Chemistry
Electrochemistry
Elimination Tool:

A) Decreases

B) Increases

C) Remains constant

D) Both decreases and increases

17 / 100

Category: Chemistry Ch 6 Class 11

Which of the following has greatest electronegativity?

Cl2

Br2

18 / 100

Category: Chemistry Ch 13 Class 12

The same carboxylic acid is obtained either by hydrolysis of a nitrite X or by oxidation of alcohol Y. Which pair could be X and Y? X Y

19 / 100

Category: Chemistry Ch 10 Class 12

Markownikoff’s rule is best applicable to the reaction between

NUMS 2018
Chemistry
Alkyl Halides and Amines
Elimination Tool:

A) C3H6+ Br2

B) C2H4+ HCl

C) C3H8+ Br2

D) C3H6+ HBr

20 / 100

Category: Chemistry Ch 13 Class 12

The compounds having -COOH group are called as_______?

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

A) Aldehydes

B) Ketones

C) Carboxylic acids

D) Alcohols

21 / 100

Category: Chemistry

Q.14 Kinetic Energy is the sum of

A. Rotational & Vibrational

B. Translation & Rotational

C. Rotational, Vibrational and Translation

D. All of these

22 / 100

Category: Chemistry Ch 13 Class 12

Which one will act as a strong acid?

UHS 2018
Chemistry
Carboxylic Acids and its Derivatives
Elimination Tool:

A) Chloroethanoic acid

B) Ethanoic acid

C) Trichloroethanoic acid

D) Dichloroethanoic acid

23 / 100

Category: Chemistry Ch 7 Class 11

The heat of a reaction can be calculated by using:

NTS 2010
Chemistry
Thermochemistry
Elimination Tool:

A) Joule's Law

B) Ohm's Law

C) Hess's Law

D) Faraday's Law

24 / 100

Category: Chemistry Ch 11 Class 11

If energy of the activated complex is close to energy of reactants, it means that the reaction is:

NUMS 2019 Reconduct
Chemistry
Reaction Kinetics
Elimination Tool:

A) Fast

B) Moderate

C) Slow

D) Very slow

25 / 100

Category: Chemistry Ch 5 Class 11

Mass of electron in a.m.u is:

NUMS 2020
Chemistry
Atomic Structure
Elimination Tool:

A) 1.0073

B) 1.0087

C) 5.485 x 10-4

D) 9.1 x 10-31

26 / 100

Category: Chemistry Ch 6 Class 11

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

27 / 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

28 / 100

Category: Chemistry Ch 13 Class 12

Fatty Acids are:

Aliphatic Monocarboxylic Acids

Obtained from sugars

Contain a suffix "al"

With low boiling point

29 / 100

Category: Chemistry Ch 9 Class 12

The four bonds of carbon in methane are directed towards the corners of a:

NUMS 2014
Chemistry
Hydrocarbons
Elimination Tool:

A) Cube

B) Pentagon

C) Hexagon

D) Tetrahedron

30 / 100

Category: Chemistry Ch 7 Class 11

Through what phenomenons does heat flow?

PMC Sample 2
Chemistry
Thermochemistry
Elimination Tool:

A) Conduction

B) Convection

C) Radiation

D) All of these

31 / 100

Category: Chemistry Ch 2 Class 12

Which of the following is not true about caustic soda? a) It causes painful burns c) It is manufactured by Costner—Kellner process e) Both b and d

) It causes painful burns

It is manufactured by Costner—Kellner process

Both b and d

b) It has purgative smell

d) It is used os on anti-acid

32 / 100

Category: Chemistry Ch 11 Class 12

The product formed by acid catalysed hydration of 2 – phenyl propene is:

NUMS 2018
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) 3 – phenyl – 2 – propanol

B) 2 – phenyl – 2 – propanol

C) 1 – phenyl – 1 – propanol

D) 1 – phenyl – 2- propanol

33 / 100

Category: Chemistry Ch 4 Class 11

The rate of diffusion of liquids is ________ than gases.

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

A) Lower

B) Higher

C) Equal to

D) All of these options are correct

34 / 100

Category: Chemistry Ch 1 Class 12

Maximum ionization potential is of:

NUMS 2014
Chemistry
Periodicity in Elements
Elimination Tool:

A) Ca

B) Na

C) Be

D) Mg

35 / 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

36 / 100

Category: Chemistry Ch 9 Class 12

Which type of hybridization takes place in benzene?

Sp3

Sp2

Sp2 and Sp3

37 / 100

Category: Chemistry Ch 2 Class 11

% of oxygen by mass. What is the empirical formula of ascorbic acid?

NUMS 2016
Chemistry
Stoichiometry
Elimination Tool:

A) C3H4O3

B) C3H4O6

C) CH4O3

D) C6H4O3

38 / 100

Category: Chemistry Ch 4 Class 11

Which one Is not possible a)

Ionic crystal

Covalent crystal

Metallic crystal

Atomic-crystal

39 / 100

Category: Chemistry Ch 4 Class 11

The rate of diffusion of hydrogen gas as compared to that of oxygen gas is:

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

A) 6 times

B) 4 times

C) one fourth

D) one eighth

40 / 100

Category: Chemistry Ch 13 Class 12

On reacting with which of the following carboxylic acids produce CO₂?

PMC Sample 1
Chemistry
Carboxylic Acids and its Derivatives
Elimination Tool:

A) Carbonate

B) Bicarbonate

C) Bisulphites

D) Both a and b

41 / 100

Category: Chemistry Ch 11 Class 12

14) Ethanol and Methanol can be separated by:

Cannizzaro's reaction

Iodoform test

b) Lucas Test

Tolien's test

42 / 100

Category: Chemistry Ch 8 Class 12

Benzene can be prepared from:

PreMedPK MDCAT Mock 2
Chemistry
Hydrocarbons
Elimination Tool:

A) From Petroleum

B) From Coal

C) From Acetylene

D) From Phenol

E) Al of these

43 / 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

44 / 100

Category: Chemistry Ch 3 Class 11

A crystal system having all sides (a, b and c) unequal and anglesα = β = γ= 90 is:

NUMS 2015
Chemistry
States of Matter – Gases, Liquids and Solids
Elimination Tool:

A) Cubic

B) Rhombohedral

C) Orthorhombic

D) Hexagonal

45 / 100

Category: Chemistry Ch 10 Class 12

Ninhydrin reacts with an amino acid to form a product that has the colour:

NUMS 2015
Chemistry
Alkyl Halides and Amines
Elimination Tool:

A) Blue

B) Violet

C) Bluish violet

D) Red

46 / 100

Category: Chemistry

Bond energy of C-CI in kJ/moles Is:

More than that of C-F

Less than C-Br

More than that of C-Br but less than C-I

More than that of C-Br and C-I

47 / 100

Category: Chemistry

At Equilibrium, which of the following reactions is not affected by pressure?

NUMS Mock 3
Chemistry
Chemical Equilibrium

A) A

B) B

C) C

D) D

48 / 100

Category: Chemistry Ch 10 Class 12

When Grignard reagent reacts with 1120, which of the following is formed

Parent alkane

Alkyl halide c

Alcohol

All are possible

49 / 100

Category: Chemistry Ch 6 Class 11

GN lewis described which one of the following bonds?

NTS 2015 SMBBMC
Chemistry
Chemical Bonding
Elimination Tool:

A) Ionic bond

B) covalent bond

C) coordinate covalent bond

D) all of the above

50 / 100

Category: Chemistry Ch 6 Class 11

Which of the following has a lone pair of electrons on the central atom?

PCI3

NH4

PCI

CH4

51 / 100

Category: Chemistry Ch 8 Class 12

Formula of Thionyl chloride is

SCI3

S2Cl2

SOCl2

SOCI3

52 / 100

Category: Chemistry

Which of the following does not give iodoform test?

NUMS Mock 1
Chemistry
Aldehydes and Ketones

A) Ethanol

B) Ethanal

C) Acetophenone

D) Benzophenone

53 / 100

Category: Chemistry Ch 11 Class 11

In a reversible reaction, catalyst lowers the action energy of the:

NUMS 2020
Chemistry
Reaction Kinetics
Chemical Equilibrium
Elimination Tool:

A) Forward reaction

B) Reverse reaction

C) Forward as well as reverse reaction

D) Forward reaction but increases that of the reverse reaction

54 / 100

Category: Chemistry Ch 13 Class 12

Solubility of carboxylic acids ______?

PMC Sample 1
Chemistry
Carboxylic Acids and its Derivatives
Elimination Tool:

A) Decreases with increase of volume

B) Decreases with increase in molecular mass

C) Increases with increase in molecular mass

D) None of these

55 / 100

Category: Chemistry Ch 2 Class 12

Red lead is:

NUMS 2014
Chemistry
s and p Block Elements
Elimination Tool:

A) PbO

B) Pb3O4

C) Pb2O4

D) Pb2O5

56 / 100

Category: Chemistry Ch 10 Class 11

In Balancing redox equation, the first thing is to:

PMC Sample 3
Chemistry
Electrochemistry
Elimination Tool:

A) Balance out the atoms on each side

B) Write the skeleton Equation

C) Calculate the oxidation Number

D) Identify the elements and their states

57 / 100

Category: Chemistry Ch 6 Class 11

Which of the following hybrid orbitals has maximum “s” character?

PMC 2020
Chemistry
Chemical Bonding
Elimination Tool:

A) Sp3 hybrid orbital

B) Sp2 hybrid orbital

C) Sp hybrid orbital

D) Dsp2 hybrid orbital

58 / 100

Category: Chemistry Ch 11 Class 12

Higher order alcohols

Have more than 1 carbon

have more than 3 carbons

Have more than 2 carbons

Have more than 4 carbons

59 / 100

Category: Chemistry Ch 5 Class 11

Spectrum of which series is in the UV region?

Lyman serie

Balmer series

Paschen series

Pfund series

60 / 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

61 / 100

Category: Chemistry Ch 3 Class 12

Borax bead test is used to separate:

) Metallic cations

Non-metallic cations

Metallic anions

Non-metallic anions

62 / 100

Category: Chemistry Ch 8 Class 11

Buffer solution of every liquid is

Same

Different

Depends upon pH

None of these

63 / 100

Category: Chemistry Ch 6 Class 11

Down the group atomic radii increases due to?

Increase in screening effect

Repulsion between the electrons of valence shell

Increase in nuclear charge

All of these

64 / 100

Category: Chemistry Ch 10 Class 11

When electricity is passed through water in the presence of an acid, oxygen and ______ is produced.

NTS 2018
Chemistry
Electrochemistry
Elimination Tool:

A) Carbon

B) CO

C) CO2

D) Hydrogen

65 / 100

Category: Chemistry Ch 1 Class 11

A mole of a substance contains _____ particles.

PMC Practice 7
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) 6.2×1022

B) 6.22×1022

C) 6.02×1023

D) 6.5×1022

66 / 100

Category: Chemistry Ch 1 Class 11

Find the mass in grams of 1.69 mol of phosphoric acid.

PMC 2021 Tested
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) 165.6 g

B) 157 g

C) 148 g

D) 138 g

67 / 100

Category: Chemistry

Q.122 Glycoprotein is classified as

A. Simple protein

B. Conjugated protein

C. Derived protein

D. Non-conjugated protein

68 / 100

Category: Chemistry

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

NUMS Mock 1
Chemistry
Chemical Equilibrium

A) H2S2O7

B) HSO4-

C) SO3

D) S

69 / 100

Category: Chemistry Ch 8 Class 12

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

NTS 2013
Chemistry
Hydrocarbons
Elimination Tool:

A) Structural isomerism

B) Functional isomerism

C) Chain isomerism

D) Metamerism

70 / 100

Category: Chemistry Ch 4 Class 11

What does the constant ‘n’ represent in the equation of state for an ideal gas PV = nRT?

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

A) Number of atoms in the gas

B) Number of moles of the gas

C) Number of nucleons

D) Number of molecules of gas

71 / 100

Category: Chemistry Ch 4 Class 12

Both 02 and 03 are Oxidizing agents but 02 is preferred because:

It is relatively unstable than 02

It provides an extra oxygen atom then 02

It provides Nascent Oxygen

All of above

72 / 100

Category: Chemistry Ch 6 Class 11

Geometry of SF6 is:

Octahedral

Hexagonal

Decahedral

Trigonal

73 / 100

Category: Chemistry Ch 8 Class 12

Which one of the following molecules has the shortest distance of carbon atoms?

PreMedPK MDCAT Mock 3
Chemistry
Hydrocarbons
Elimination Tool:

A) CH3- CH3

B) CH2= CH2

C) CH≡ CH

D) CH3- CH2- CH3

74 / 100

Category: Chemistry

The radiations from a naturally occurring radioactive substance, as seen after deflection by a magnetic field in one direction, are:

NUMS Mock 2
Chemistry
Analytical Chemistry

A) Definitely Alpha-rays

B) Definitely Beta-rays

C) Both Alpha and Beta rays

D) Either Alpha or Beta rays

75 / 100

Category: Chemistry Ch 3 Class 11

2 gasses at SIP, with equal volume and equal pressure will have same a

K.E

Mass

Number of molecule

Weight

76 / 100

Category: Chemistry

Q.100 I–I bond distance in case of gases iodine is

A. 271.5pm

B. 266.6pm

C. 4.9pm

D. 251.4ppm

77 / 100

Category: Chemistry Ch 6 Class 11

The geometry of H2S and its dipole moment are:

NTS 2016 DUHS & JSMU
Chemistry
Chemical Bonding
Elimination Tool:

A) Angular and non – zero

B) Angular and zero

C) Linear and zero

D) Linear and non – zero

78 / 100

Category: Chemistry Ch 9 Class 12

Alkaline KMnO4 converts ethylene into:

NUMS 2014
Chemistry
Hydrocarbons
Elimination Tool:

A) Methanol

B) Ethane

C) Ethanol

D) Ethylene glycol

79 / 100

Category: Chemistry Ch 12 Class 12

H —CHO is:

Formaldehyde

Acetaldehyde

Ketone

Ester

80 / 100

Category: Chemistry Ch 9 Class 12

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

NUMS 2019 Reconduct
Chemistry
Hydrocarbons
Elimination Tool:

A) Nitrobenzene

B) Phenol

C) Aniline

D) Toluene

81 / 100

Category: Chemistry

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

NUMS Mock 1
Chemistry
Hydrocarbons

A) Benzoic acid

B) Methyl benzene

C) Benzaldehyde

D) Nitrobenzene

82 / 100

Category: Chemistry Ch 5 Class 11

The lightest positive rays obtained is from:

NUMS 2020
Chemistry
Atomic Structure
Elimination Tool:

A) Hydrogen gas

B) Helium

C) Neon

D) Air

83 / 100

Category: Chemistry Ch 14 Class 12

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

NTS 2010
Chemistry
Macromolecules
Elimination Tool:

A) Hydrochloric acid and hydrogen

B) Hydrogen and sodium

C) Hydrogen and sodium hydroxide

D) Sodium and sodium hydroxide

84 / 100

Category: Chemistry Ch 4 Class 11

The variation in physical properties of a crystal due to direction is called

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

A) isotropy

B) entropy

C) anisotropy

D) none of these

85 / 100

Category: Chemistry Ch 11 Class 11

Reaction of Sodium with water is an example of

PMC Sample 3
Chemistry
Reaction Kinetics
Elimination Tool:

A) Reversible reaction

B) Endothermic

C) Irreversible

D) Slow

86 / 100

Category: Chemistry

Q.99 The ionic compound with the highest lattice energy is

A. NaF

B. NaCl

C. NaBr

D. NaI

87 / 100

Category: Chemistry Ch 15 Class 12

In the atmosphere, CO2 is about:

FMDC 2018
Chemistry
Environmental Chemistry
Elimination Tool:

A) 0.01％

B) 0.03％

C) 0.05％

D) 0.09％

88 / 100

Category: Chemistry Ch 9 Class 12

Activation of the benzene ring in aniline can be decreased by treating with:

NUMS 2017
Chemistry
Hydrocarbons
Elimination Tool:

A) Dil HCL

B) Ethyl alcohol

C) Acetic acid

D) Acetyl chloride

89 / 100

Category: Chemistry Ch 2 Class 12

Color of Epsom salt Is

White

Pink

Blue

Green

90 / 100

Category: Chemistry Ch 13 Class 12

The carbonic acid which Is named after butter is:

Capric acid

Enanthic acid

Butyric Acid

Formic acid

91 / 100

Category: Chemistry

The amount (in liters) of Oxygen at STP that is required for the combustion of 4gm of ethylene is :

NUMS Mock 2
Chemistry
Stoichiometry

A) 96 liters

B) 9.6 liters

C) 44.8 liters

D) 7.2 liters

92 / 100

Category: Chemistry Ch 1 Class 12

Which of the following elements has the lowest ionistion enthalpy?

PMC Sample 2
Chemistry
Periodicity in Elements
Elimination Tool:

A) Na

B) K

C) Mg

D) Al

93 / 100

Category: Chemistry Ch 8 Class 12

Methane reacts with chlorine to form chloromethane. The catalyst used is?

NTS 2015 SMBBMC
Biology
Hydrocarbons
Elimination Tool:

A) Pb

B) Zn

C) HCl

D) Sunlight

94 / 100

Category: Chemistry Ch 7 Class 12

The type of isomerism in which the position of functional group changes is called?

Tautomesrism

Cis-Trans Isomerism

Funcricinal Group Isomerism

Metamerism

95 / 100

Category: Chemistry

Which enthalpy change is relevant in the following process

Na(s) -> Na (g) ΔH = +107

NUMS Mock 2
Chemistry
Thermochemistry

A) Enthalpy of atomization

B) Enthalpy of fusion

C) Enthalpy of vaporization

D) Enthalpy of formation

96 / 100

Category: Chemistry

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

NUMS Mock 1
Chemistry
s and p Block Elements

A) KMnO4

B) Chloramines

C) O3

D) Alums

97 / 100

Category: Chemistry Ch 11 Class 12

How are carboxylic acids formed from alcohol?

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

A) Hydrolysis

B) Reduction

C) Oxidation

D) Protonation

98 / 100

Category: Chemistry Ch 11 Class 12

The classification of monohydric alcohols is due to

PMC Sample 3
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) hydrogen atom

B) carbon atom

C) hydroxyl group

D) carbonyle group

99 / 100

Category: Chemistry Ch 9 Class 12

The bond angles in benzene ring are:

PMC Sample 1
Chemistry
Hydrocarbons
Elimination Tool:

A) 90˚

B) 60˚

C) 120˚

D) 180˚

100 / 100

Category: Chemistry

Who discovered positive rays (also called protons) and when?

NUMS Mock 4
Atomic Structure

A) Chadwick,1895

B) Goldstein,1886

C) Rutherford,1885

D) J.Perrin,1885

Your score is

The average score is 55%

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