Chemistry Practice Test 1

Created by Ali Durrani

NET Practice

1 / 100

Category: Chemistry

Q.174 The alcohols which are resistant to oxidation reactions are

A. Primary alcohols

B. Secondary alcohol

C. Tertiary alcohol

D. All of above

2 / 100

Category: Chemistry

Transition Elements usually show:

NUMS Mock 2
Chemistry
d and f Block Elements

A) Para magnetism

B) Diamagnetism

C) Ferromagnetism

D) Both Ferromagnetism and Paramagnetism

3 / 100

Category: Chemistry Ch 5 Class 11

Which of the following orbital will be filled first than 4p?

NUMS 2020
Chemistry
Atomic Structure
Elimination Tool:

A) 4s

B) 2p

C) 3d

D) 1s

4 / 100

Category: Chemistry

Q.4 Melting and boiling point of transition elements are higher due to

A. Higher binding energies

B Strong metallic bonding

C. Hardness

D. All of these

5 / 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

6 / 100

Category: Chemistry

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

A. Cu

B. Zn

C. Cr

D. V

7 / 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

8 / 100

Category: Chemistry Ch 6 Class 11

An ionic compound is most likely to be formed when:

NUMS 2015
Chemistry
Chemical Bonding
Elimination Tool:

A) Ionization energy of A is high but electron affinity of B is low

B) The ionization energy of A is low but electron affinity of B is high

C) Both ionization energy of A and electron affinity of B are high

D) Both ionization energy of A and electron affinity of B are low

9 / 100

Category: Chemistry Ch 2 Class 12

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

NTS 2011
Chemistry
s and p Block Elements
Elimination Tool:

A) Covalent hydrides

B) Ionic hydrides

C) Complex hydrides

D) Metallic hydrides

10 / 100

Category: Chemistry Ch 12 Class 12

Hybridization of carbon in -CHO group is:

NUMS 2019 Reconduct
Chemistry
Aldehydes and Ketones
Elimination Tool:

A) sp

B) sp2

C) sp3

D) dsp

11 / 100

Category: Chemistry

Catalytic hydrogenation of alkenes exhibits:

NUMS Mock 2
Chemistry
Hydrocarbons

A) Substitution reaction

B) Elimination reaction

C) Addition reaction

D) Condensation reaction

12 / 100

Category: Chemistry Ch 8 Class 11

In Exothermic Reactions heat is _______

PMC Sample 3
Chemistry
Chemical Equilibrium
Elimination Tool:

A) Taken in

B) Give out to surroundings

C) Neither given nor lost

D) None of these

13 / 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

14 / 100

Category: Chemistry Ch 15 Class 12

Rayon is ____?

PMC Practice 10
Chemistry
Industrial Chemistry
Elimination Tool:

A) Acetyl chloride

B) Alkene

C) Alkyne

D) Acetic acid

15 / 100

Category: Chemistry Ch 10 Class 11

Highest oxidation state of chlorine Is

+7

-7

+1

−1

16 / 100

Category: Chemistry Ch 15 Class 12

Which of the following is the most environmentally-friendly source to derive energy?

UHS 2017 Reconduct
Chemistry
Environmental Chemistry
Elimination Tool:

A) Lead-acid accumulator

B) H2- O2 fuel cell

C) Silver Oxide Battery

D) Alkaline battery

17 / 100

Category: Chemistry

Le Chatelier Principle is about:

NUMS Mock 1
Chemistry
Chemical Equilibrium

A) Reaction Mixture

B) Reactants

C) Equilibrium Mixture

D) Products

18 / 100

Category: Chemistry Ch 11 Class 12

Dehydration of ethanol at 100 oC in the presence of concentrated H2SO4 gives:

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

A) Ethene

B) Ethane

C) Ethyne

D) Ether

19 / 100

Category: Chemistry Ch 13 Class 12

Carboxylic acids do not give the characteristics reaction of >C=O group because of:

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

A) Polar nature

B) Resonance

C) Symmetrical structure

D) Attached alkyl group

20 / 100

Category: Chemistry Ch 3 Class 11

The stability of ionic crystal depends principally on:

NTS 2014
Chemistry
States of Matter – Gases, Liquids and Solids
Elimination Tool:

A) High electron affinity of anion forming species

B) Lattice energy of crystal

C) Low Ionization energy of cation forming species

D) Low heat of sublimation of cation forming solid

21 / 100

Category: Chemistry Ch 12 Class 12

A student mixed ethyl alcohol with a small amount of sodium dichromate and added it to the hot solution of dilute sulphuric acid. A vigorous reaction took place. He distilled the product formed immediately. What was the product?

PreMedPK MDCAT Mock 3
Chemistry
Aldehydes and Ketones
Elimination Tool:

A) Acetone

B) Acetic acid

C) Dimethyl ether

D) Acetaldehyde

22 / 100

Category: Chemistry Ch 11 Class 12

Alkyl groups In ethers are connected by?

An oxygen atom

A carbon atom

A nitrogen atom

A benzene ring

23 / 100

Category: Chemistry Ch 7 Class 11

Which one of the following equations correctly defines the enthalpy changes of formation of carbon monoxide:

NUMS 2018
Chemistry
Thermochemistry
Elimination Tool:

A) C(s) + 1/2 O2 -> CO(g)

B) C(g) + 1/2 O2-> CO(g)

C) C(s) + O(g)-> CO(g)

D) C(g) + CO2(g) -> 2CO(g)

24 / 100

Category: Chemistry Ch 13 Class 12

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

UHS 2019
Chemistry
Carboxylic Acids and its Derivatives
Elimination Tool:

A) KMnO4

B) LiAlH4

C) K2Cr2O4

D) H2SO4

25 / 100

Category: Chemistry Ch 6 Class 11

Dipole moment of H2 is:

1.03

) 1.45

0.78

0

26 / 100

Category: Chemistry

Q.126 What is the coordination number of Pt in [PtCINO2)NH3)4]

A. 2

B. 4

C. 6

D. 7

27 / 100

Category: Chemistry Ch 6 Class 11

Ionic, covalent and co-ordinate covalent bonds are simultaneously present in the molecular geometry of:

NTS 2017
Chemistry
Chemical Bonding
Elimination Tool:

A) Ammonia

B) Ammonium hydroxide

C) Hydrochloric acid

D) Water

28 / 100

Category: Chemistry Ch 13 Class 12

Which of the following is an example of aromatic carboxylic acid?

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

A) Ethanoic acid

B) Butanoic acid

C) Adipic acid

D) Phthalic acid

29 / 100

Category: Chemistry Ch 10 Class 11

The overall positive reduction potential value predicts that process is:

NUMS 2015
Chemistry
Electrochemistry
Elimination Tool:

A) Not feasible

B) Feasible

C) Impossible

D) No indication

30 / 100

Category: Chemistry Ch 11 Class 12

Phenol is reduced to benzene on reaction with:

Zn

NaOH

KMnO4

HO

31 / 100

Category: Chemistry

Q.69 For the expression of solubility the general formula of the sparingly soluble salt is

A. AB

B. AB2

C. AB3

D. A3B

32 / 100

Category: Chemistry Ch 1 Class 12

Which group of elements shows greatest electrical conductivity?

Alkali metals

Alkaline earth metals

Halogens

Coinage Metals

33 / 100

Category: Chemistry Ch 2 Class 12

Point out the property which is not characteristic of alkali metal:

NUMS 2014
Chemistry
s and p Block Elements
Elimination Tool:

A) Low electronegativity

B) Low melting point

C) Their ions are isoelectronic with noble gas

D) High ionization energy

34 / 100

Category: Chemistry

Q.178 Which type of bonds are break during cracking?

A. C-C

B.C-H

C. Both C-C and C-H

D. C-O

35 / 100

Category: Chemistry Ch 5 Class 12

Which of the following show halogens?

F to At

N to CH

C to Sn

H to Cs.

36 / 100

Category: Chemistry Ch 4 Class 11

Loose electrons present in outer shell meansv

High melting point

High boiling point means:

High conductivity

None of these

37 / 100

Category: Chemistry Ch 14 Class 12

The sugar unit in DNA molecule is:

NUMS 2019 Reconduct
Chemistry
Macromolecules
Elimination Tool:

A) Ribose

B) 2 – deoxyribose

C) 3 – deoxyribose

D) 2 – deoxypentose

38 / 100

Category: Chemistry Ch 11 Class 12

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

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

A) CH3COCH3

B) CH3COOCH3

C) CH3CH2CHO

D) CH3CH2COOH

39 / 100

Category: Chemistry Ch 10 Class 11

Current in electrolysis is carried through?

PMC Practice 1
Chemistry
Electrochemistry
Elimination Tool:

A) Free electrons

B) Positive Ions

C) Negative Ions

D) Both B and C

40 / 100

Category: Chemistry Ch 9 Class 12

Which catalyst is used to oxidize benzene rings?

NUMS 2019 Reconduct
Chemistry
Hydrocarbons
Elimination Tool:

A) FeBr3

B) V2O5

C) Fe + Al2O3

D) Raney Ni

41 / 100

Category: Chemistry Ch 10 Class 11

Hydrolysis means reaction with

PMC Sample 3
Chemistry
Electrochemistry
Elimination Tool:

A) Oxygen

B) Hydrogen

C) Water

D) Air

42 / 100

Category: Chemistry Ch 7 Class 12

CH3CH2CH2COCH3 is the functional isomer of:

NTS 2016 DUHS & JSMU
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) CH3CH2CH2CH2CHO

B) CH3CH2CH2CH2OH

C) CH3CH2COCH2CH3

D) CH3 – (CH)2 COCH2CH3

43 / 100

Category: Chemistry

Q.101 Strong acid can be involved in a spontaneous reaction which is termed as

A. Addition Reaction

B. Substitution Reaction

C. Neutralization Reaction

D. Reversible Reaction

44 / 100

Category: Chemistry Ch 3 Class 11

Upon which factor is vapour pressure not dependent:

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

A) Temperature

B) Intermolecular forces

C) Density of liquid

D) Surface area of liquid

45 / 100

Category: Chemistry Ch 4 Class 11

Which of the following shows H-bonding?

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

A) CH₃CH₂OH

B) CH₃-O-CH₃

C) CH₃CH₂Cl

D) All of these

46 / 100

Category: Chemistry Ch 6 Class 11

The molecule with zero dipole moment is:

NUMS 2015
Chemistry
Chemical Bonding
Elimination Tool:

A) NH3

B) H2O

C) BF3

D) SO2

47 / 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

48 / 100

Category: Chemistry Ch 1 Class 12

Which orbitals take part in binding of transition elements

PMC Sample 1
Chemistry
Periodicity in Elements
Elimination Tool:

A) Outermost s orbital and p orbitals

B) Outermost d orbital and underlying half filled f-orbitals

C) Outermost p orbital and underlying half filled d-orbitals

D) Outermost s orbital and underlying half filled d-orbitals

49 / 100

Category: Chemistry Ch 10 Class 11

In the reaction 2Fe+Cl2 2FeCl3

NTS 2017
Chemistry
Electrochemistry
Elimination Tool:

A) Fe is reduced

B) Fe is oxidized

C) Cl2 oxidized

D) None of the above

50 / 100

Category: Chemistry Ch 4 Class 11

The nature of Binding Force in Ionic Crystals is

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

A) Magnetic

B) Repulsive

C) Electrostatic

D) Weak

51 / 100

Category: Chemistry Ch 12 Class 12

IUPAC name of propionaldehyde is:

Methanal

Acetaldehyde

Propanal

Butanal

52 / 100

Category: Chemistry Ch 6 Class 11

Sigma bond is formed by:

NTS 2010
Chemistry
Chemical Bonding
Elimination Tool:

A) Transferring the electrons

B) Head-on overlapping of atomic orbitals

C) Mutual but unequal sharing of electrons

D) Parallel overlapping of atomic orbitals

53 / 100

Category: Chemistry Ch 11 Class 11

Half-life of iron is? (A=59)

44.5 days

1.3 million years

3.8 days

2.5 billion years

54 / 100

Category: Chemistry Ch 7 Class 11

A catalyst increases the rate of reaction by:

NTS 2019
Chemistry
Thermochemistry
Elimination Tool:

A) decreasing the activation energy

B) decreasing the concentration of reactants

C) decreasing the temperature

D) increasing the temperature

55 / 100

Category: Chemistry Ch 15 Class 12

Aluminium nitrate is not used for ai

Corn

Cotton

Rice

Wheat

56 / 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

57 / 100

Category: Chemistry

Which of the following does not show variable valency?

NUMS Mock 3
Chemistry
Atomic Structure

A) Mn

B) Fe

C) Zn

D) Cr

58 / 100

Category: Chemistry Ch 4 Class 11

Viscosity of HF is: c) y d) a) Greater than 1120 b) Smaller than F120 c) Equal to HIO d) Plane of these

Greater than H2O

Smaller than H2O

Equal to H2O

None of these

59 / 100

Category: Chemistry Ch 5 Class 11

The ground state of an atom corresponds to a state of :

NTS 2016 DUHS & JSMU
Chemistry
Atomic Structure
Elimination Tool:

A) Maximum energy

B) Minimum energy

C) Negative energy

D) Positive energy

60 / 100

Category: Chemistry Ch 1 Class 12

At the end of the periodic table _____ are found.

NTS 2016 DUHS & JSMU
Chemistry
Periodicity in Elements
Elimination Tool:

A) S block element

B) P block element

C) D block element

D) Noble gases

61 / 100

Category: Chemistry Ch 8 Class 11

A system at equilibrium can be disturbed by:

NTS 2013
Chemistry
Chemical Equilibrium
Elimination Tool:

A) Concentration change

B) Pressure change

C) Temperature

D) All of the above

62 / 100

Category: Chemistry Ch 12 Class 12

Cyanohydrins can be synthesized from ketones through:

PreMedPK MDCAT Mock 4
Chemistry
Aldehydes and Ketones
Elimination Tool:

A) Nucleophilic addition reaction

B) Unimolecular Nucleophilic substitution reaction

C) Electrophilic substitution reaction

D) Bimolecular Nucleophilic substitution reaction

63 / 100

Category: Chemistry Ch 13 Class 12

Lysine is a
amino acid

Acidic

Basic

Neutral

Amphoteric

64 / 100

Category: Chemistry Ch 7 Class 12

Propyl Acetate and valeric acid are which type of isomers

NUMS 2018
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) Tautomers

B) Functional

C) Position

D) Metamers

65 / 100

Category: Chemistry

Which of the following reagents will reduce butanoic acid to butanol?

NUMS Mock 1
Chemistry
Carboxylic Acids and its Derivatives

A) LiAlH4

B) LiAlH4.H2O

C) Mg(BH4)2

D) All of the above

66 / 100

Category: Chemistry Ch 14 Class 12

Which of the following element is not usually present in all proteins?

PMC Practice 3
Chemistry
Macromolecules
Elimination Tool:

A) Carbon

B) Hydrogen

C) Nitrogen

D) Sulphur

67 / 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

68 / 100

Category: Chemistry Ch 6 Class 11

The bond angle of NF3 is:

102.5

104

107.5

120

69 / 100

Category: Chemistry Ch 3 Class 11

The Vander Waal’s constant ‘If of a gas Is four times the:

Actual volume

Volume of vessel

free volume

Volume

70 / 100

Category: Chemistry Ch 1 Class 11

In the ion-electron method of balancing equations, how oxygen is balanced?

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

A) O is balanced by adding H₂O

B) O is balanced by adding OH

C) All of these

D) O is balanced by adding O₂

71 / 100

Category: Chemistry

Q.24 Non polar covalent bond is formed b/w

A. homonuclear diatomic molecules

B. heteronuclear diatomic molecules

C. similar atoms

D. dissimilar atoms

72 / 100

Category: Chemistry Ch 2 Class 12

Sodium Is prepared by

Down’s cell

Dutch’s method

Castner-kellner process

Nelson’s process

73 / 100

Category: Chemistry Ch 2 Class 12

Li is an element of group?

II-A

Ill-A

I-A

IV-B

74 / 100

Category: Chemistry Ch 8 Class 11

Law of mass action was derived by:

NUMS 2014
Chemistry
Chemical Equilibrium
Elimination Tool:

A) Newton

B) CM Guldberg

C) P Waage

D) CM Guldberg and P Waage

75 / 100

Category: Chemistry Ch 7 Class 11

Which one is not related to evaporation?

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

A) Continuous

B) Endothermic

C) Exothermic

D) Spontaneous

76 / 100

Category: Chemistry Ch 8 Class 12

In which of the following C-C bond length is the minimum?

Alkane

Alkene

Benzene

Same length in all

77 / 100

Category: Chemistry

Q.75 Metallic character depends on.

A. Electron affinity

B. Ionization energy

C. Electronegativity

D. All of these

78 / 100

Category: Chemistry

Q.129 The biochemical process used in the synthesis of alcohol in the presence of yeast is called as____________________?.

A. Respiration

B. Photosynthesis

C. Fermentation

D. Aerobic respiration

79 / 100

Category: Chemistry Ch 9 Class 11

An azeotropic mixture of two liquids has a boiling point higher than either of them when it:

NUMS 2016
Chemistry
Solution and Colloids
Elimination Tool:

A) Shows positive deviation from Raoult’s law

B) Shows negative deviation from Raoult’s law

C) Shows ideal behaviour

D) Is saturated

80 / 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

81 / 100

Category: Chemistry Ch 6 Class 12

Which of the following has the lowest boiling point?

Titanium

Chromium

Manganese

Vanadium

82 / 100

Category: Chemistry Ch 11 Class 12

Which of the following esters give a Jasmine Flavour?

PreMedPK MDCAT Mock 2
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) Ethyl Acetate

B) Octyl Acetate

C) Amyl Butyrate

D) Benzyl Acetate

83 / 100

Category: Chemistry Ch 1 Class 12

Borax exists in nature as:

NTS 2013
Chemistry
Periodicity in Elements
Elimination Tool:

A) Na2B4O7.10H2O

B) Na2B4O7.7H2O

C) Na2B4O7.5H2O

D) Na2B4O7.3H2O

84 / 100

Category: Chemistry

Q.159 An aromatic compound that can obtained from coal tar is

A. Benzene

B. Toluene

C. Phenol

D. Diphenylmethane

85 / 100

Category: Chemistry

The test used to distinguish among primary, secondary, and tertiary alcohols is:

NUMS Mock 4
Chemistry
Alcohols, Phenols and Ethers

A) 2, 4 – DNPH test

B) Tollens’ Test

C) Lucas Test

D) Fehling solution test

86 / 100

Category: Chemistry Ch 12 Class 12

Which of the following does not give iodoform test?

NUMS 2014
Chemistry
Aldehydes and Ketones
Elimination Tool:

A) Ethanol

B) Ethanal

C) Acetophenone

D) Benzophenone

87 / 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

88 / 100

Category: Chemistry Ch 4 Class 12

Formula of laughing gas is?

NO

NH4

N20

NO3

89 / 100

Category: Chemistry Ch 15 Class 12

Which one of the following is an example of a condensation polymer?

UHS 2014
Chemistry
Industrial Chemistry
Elimination Tool:

A) Polyvinyl Chloride

B) Polystyrene

C) Polyethene

D) Polyamide

90 / 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

91 / 100

Category: Chemistry Ch 6 Class 11

Hybridization in BeCl2 Is a

sp3 hybridization

sp2 hybridization

sp hybridization

None of these

92 / 100

Category: Chemistry Ch 12 Class 12

The flavour of amyl butyrate is:

PreMedPK MDCAT Mock 5
Chemistry
Aldehydes and Ketones
Elimination Tool:

A) Mango

B) Raspberry

C) Apricot

D) Orange

93 / 100

Category: Chemistry Ch 9 Class 12

Which of the following method is used to prepare Ethylene glycol from ethene?

PMC Practice 1
Chemistry
Hydrocarbons
Elimination Tool:

A) Dehydration

B) Hydroxylation

C) Hydration

D) Luca’s test

94 / 100

Category: Chemistry

Q.152 Enzymes are in nature.

A. Proteins

B. Carbohydrates

C. Lipids

D. Nucleic acid

95 / 100

Category: Chemistry Ch 3 Class 12

Zinc reacts with dil. H2SO4 to give H2. It also reacts with conc. H2SO4 to form SO2. In these reactions.

NTS 2014
Chemistry
d and f Block Elements
Elimination Tool:

A) Zn reduces H+ to H2

B) Zn oxidizes H+ to H2

C) Zn reduces SO42-to SO2

D) Zn oxidises SO42- to SO2

E) Both A and C

96 / 100

Category: Chemistry Ch 11 Class 11

What is the effect of catalyst in a reaction?

Increases the rate of reaction

Decreases the rate of reaction

Keeps the rate constant

None of these

97 / 100

Category: Chemistry Ch 12 Class 12

Ketones undergo reaction with which compound in the presence of acid to form oximes

Hydroxy methane

) Hydroxyl amine

Phenyl hydrazine

) None

98 / 100

Category: Chemistry

Q.179 The nature of amorphous solid is

A. Isotropic

B. Anisotropic

C. Mesotrophic

D. Neotropic

99 / 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

100 / 100

Category: Chemistry

Q.5 Allotropes are of same

A. Compounds

B. Molecules

C. Ions

D. Element

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