Chemistry Practice Tests 5

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Chemistry Practice Test 5

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1 / 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

2 / 100

Category: Chemistry

The relation between first and second ionization potentials of a given atom is:

NUMS Mock 4
Chemistry
Chemical Bonding

A) I1 < I2

B) I1 > I2

C) I1 = I2

D) None of the above

3 / 100

Category: Chemistry Ch 2 Class 12

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

4 / 100

Category: Chemistry Ch 7 Class 12

Which of the following has shortest C – C bond length?

Acetylene

Methyl Alcohol

Benzene

Methane

5 / 100

Category: Chemistry Ch 10 Class 11

Which one has valency other than one?

Mn in KMnO4

K in KCL

Br in Br2O

Na in NaCI

6 / 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

7 / 100

Category: Chemistry Ch 7 Class 12

Which functional group is not a double bond?

NUMS 2019 Cancelled
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) Ethers

B) Aldehydes

C) Ketones

D) Esters

8 / 100

Category: Chemistry Ch 10 Class 12

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

NTS 2013
Chemistry
Alkyl Halides and Amines
Elimination Tool:

A) Concentrated HNO3/Concentrated H2SO4/100˚C

B) Concentrated HNO3/Concentrated H2SO4/50˚C

C) Concentrated HNO3/50˚C

D) Concentrated HNO3/100˚C

9 / 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%

10 / 100

Category: Chemistry Ch 9 Class 12

Gasoline is a mixture of?

NUMS 2018
Chemistry
Hydrocarbons
Elimination Tool:

A) C3 – C5 alkanes

B) C15 – C20 alkanes

C) C11 – C15 alkanes

D) C7 – C9 alkanes

11 / 100

Category: Chemistry Ch 16 Class 12

Which of the following is a water cleaning halogen?

CI

Br

F

I

12 / 100

Category: Chemistry Ch 8 Class 11

Concentration of reactants and products are expressed as Moles per unit _______.

PMC Sample 1
Chemistry
Chemical Equilibrium
Elimination Tool:

A) Area

B) length

C) Volume

D) None of these

13 / 100

Category: Chemistry Ch 3 Class 12

The formula of cryolite is

Na2AIF6

Na3AIF3

Na3AIF6

Na2AlCl6

14 / 100

Category: Chemistry Ch 6 Class 11

How many bonds are there in CO?

1

2

3

4

15 / 100

Category: Chemistry Ch 11 Class 11

Solar energy is stored through solar panels in?

Dry cell

Magnesium cell

Nickel Cadmium battery

None of these

16 / 100

Category: Chemistry

Q.179 The nature of amorphous solid is

A. Isotropic

B. Anisotropic

C. Mesotrophic

D. Neotropic

17 / 100

Category: Chemistry Ch 7 Class 11

Which of the following values of heat of formation indicates that the product is least stable?

NTS 2017
Chemistry
Thermochemistry
Elimination Tool:

A) -393.5 KJ

B) -972.7 KJ

C) +89.9 KJ

D) +272.2 KJ

18 / 100

Category: Chemistry Ch 9 Class 12

Fuels with higher octane number can be produced by ___________.

PMC Practice 2
Chemistry
Hydrocarbons
Elimination Tool:

A) Cracking

B) Reforming

C) Decomposition

D) Isomerisation

19 / 100

Category: Chemistry Ch 8 Class 12

What Is Lindlar Catalyst?

fe203 and Al2O3

AL1O1,SIO2, Cr2O3

Pd, CaCO, and Lead salts

Charcoal

20 / 100

Category: Chemistry Ch 1 Class 11

If 9.8 g of sulfuric acid is dissolved in an excess quantity of water, it will yield _______ moles of hydrogen ion ( H+) and _______ mole of sulphate ions (SO4 -2).

PMC Practice 22
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) 0.1, 0.2

B) 0.1, 0.3

C) 0.2, 0.4

D) 0.2, 0.1

21 / 100

Category: Chemistry Ch 8 Class 11

For an equilibrium change involving gaseous phase, the forward reaction is first order while the reverse reaction is second order. The unit of Kp for the forward equilibrium is:

NTS 2019
Chemistry
Chemical Equilibrium
Elimination Tool:

A) atm

B) atm2

C) atm-1

D) atm-2

22 / 100

Category: Chemistry Ch 5 Class 11

P.E of an electron in the orbit of an atom Is

Zero

Less than zero

Greater than zero

None of these

23 / 100

Category: Chemistry Ch 3 Class 11

If the matter in a given system at a given condition is divided into two equal parts, then the value of the extensive properties will become:

NTS 2011
Chemistry
States of Matter – Gases, Liquids and Solids
Elimination Tool:

A) Double of the original value

B) Half of the original value

C) Remain the same as the original value

D) One-fourth of the original value

24 / 100

Category: Chemistry Ch 11 Class 12

The catalyst used for the formation by dehydration of alcohols ?

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

A) Concentrated HN3 at 14 C

B) Concentrated H2SO4 at 14 C

C) Hot H3PO4 at 18 C

D) ZnCl2 at 45 C

25 / 100

Category: Chemistry Ch 9 Class 11

The oxidation state of Cl in HClO4 is:

NTS 2019
Chemistry
Solution and Colloids
Elimination Tool:

A) -1

B) -5

C) +7

D) -7

26 / 100

Category: Chemistry Ch 13 Class 12

Chemical formula of Malonic acid: b) CEI-11206
a) C3H804

C3H8O4

C2H204

C6H12O6

C3H4O4

27 / 100

Category: Chemistry Ch 15 Class 12

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

NTS 2010
Chemistry
Chemistry of Life
Elimination Tool:

A) Bacteria

B) Yeast

C) Fungi

D) Algae

28 / 100

Category: Chemistry Ch 9 Class 11

For colligative properties, the solution should be:

Electrolyte

Saturated

Diluted

Concentrated

29 / 100

Category: Chemistry

Which is not a meta directing group:

NUMS Mock 1
Chemistry
Fundamental Principles of Organic Chemistry

A) -NO2

B) -COOH

C) -NH2

D) -COR

30 / 100

Category: Chemistry Ch 11 Class 11

The unit of the rate constant is the same as that of the rate of reaction in:

PMC 2020
Chemistry
Reaction Kinetics
Elimination Tool:

A) Zero order reaction

B) First order reaction

C) Second order reaction

D) Third order reaction

31 / 100

Category: Chemistry Ch 14 Class 12

How many types of polymerization reactions are there?

PMC 2021 Tested
Chemistry
Macromolecules
Elimination Tool:

A) 4

B) 2

C) 6

D) 3

32 / 100

Category: Chemistry

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

A. 2

B. 4

C. 6

D. 7

33 / 100

Category: Chemistry Ch 14 Class 12

________ is used as a preservative for life specimens.

NTS 2012
Chemistry
Macromolecules
Elimination Tool:

B) Ammonia

C) Methanol

D) NaOH

E) Formalin

34 / 100

Category: Chemistry Ch 11 Class 11

In general Photochemical reactions are of order

PMC Sample 1
Chemistry
Reaction Kinetics
Elimination Tool:

A) 1

B) 3

C) 2

D) 0

35 / 100

Category: Chemistry Ch 8 Class 12

Physical properties of Ethyne is/are:

PreMedPK MDCAT Mock 3
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

36 / 100

Category: Chemistry

Q.97 Due to less polarizability of Fluorine, it boils at ___________C

A..-188.1

B.188.1

C.184.4

D.184.4

37 / 100

Category: Chemistry Ch 8 Class 12

20 cm3 of a gaseous hydrocarbon was completely burnt in an excess of oxygen 60 cm3 of carbon dioxide and 40 cm3 of water vapours were formed, all volumes being measured at the same temperature and pressure. What is the formula of the hydrocarbon?

PreMedPK MDCAT Mock 5
Chemistry
Hydrocarbons
Elimination Tool:

A) C2H6

B) C3H4

C) C3H6

D) C3H8

38 / 100

Category: Chemistry Ch 10 Class 11

+3 and +5 oxidation states are often shown by:

Cl

F

Zn

Cu

39 / 100

Category: Chemistry

Q.106 +G108 The Markownikof’s rule is applicable only on

A. 2-Butene

B. 2-Bromo-3-chloro-2-butene

C. 2,3-Dimethyl-2-butene

D. 2-Methyl-2-butene

40 / 100

Category: Chemistry Ch 4 Class 11

Which one of the following has the highest lattice energy?

NUMS 2019 Reconduct
Chemistry
States of Matter – Gases, Liquids and Solids
Elimination Tool:

A) NaCl

B KCl

C) KBr

D) LiCl

41 / 100

Category: Chemistry

The common features, among the species CN, CO and NO are:

NUMS Mock 3
Chemistry
Chemical Bonding

A) Bond order three and Isoelectronic

B) Bond order three and weak field ligands

C) Bond order two andπacceptors

D) Isoelectronic and weak field ligands

42 / 100

Category: Chemistry Ch 8 Class 11

Which of the following factor(s) affect a reversible chemical reaction in accordance with the Le – Chatelier Principle?

NUMS 2019 Reconduct
Chemistry
Chemical Equilibrium
Elimination Tool:

A) Pressure

B) Temperature

C) Concentration

D) Pressure, concentration and temperature

43 / 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

44 / 100

Category: Chemistry Ch 9 Class 11

For a chemical reaction to occur, particles that collide should:

PMC 2021 Tested
Chemistry
Solution and Colloids
Elimination Tool:

A) Have proper orientations

B) Have proper energies

C) All of these

D) Be in a homogenous mixture

45 / 100

Category: Chemistry Ch 5 Class 12

Which of the following is a result of reaction between Iodine and Oxygen?

Iodine Hexaoxide

Iodine Pentaoxide

Iodine Dioxide

Iodine Heptaoxide

46 / 100

Category: Chemistry Ch 5 Class 12

Which of the following is a component of TEAR GAS:

Bromine

Fluorine

Chlorine

Argon

47 / 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

48 / 100

Category: Chemistry Ch 3 Class 12

What is the chemical name of SANDUR?

Tetraplumbic oxide

Triplumbic oxide

Triplumbic tetraoxide

Lead dioxide

49 / 100

Category: Chemistry Ch 10 Class 12

Which of the following bond has highest bond energy value?

PMC Sample 1
Chemistry
Alkyl Halides and Amines
Elimination Tool:

A) C-I

B) C-H

C) C-Cl

D) C-F

50 / 100

Category: Chemistry Ch 11 Class 11

Half-life of an element is 5 days. If we have 50,000 of its atoms, then how many atoms would be left after 10 days?

15000

25000

50000

None of these

51 / 100

Category: Chemistry

Which carbohydrate Is soluble in water?

Cellulose

Starch

Amylase

Fructose

52 / 100

Category: Chemistry Ch 10 Class 12

The only o, p−directing group which is deactivating in nature is:

NTS 2014
Chemistry
Alkyl Halides and Amines
Elimination Tool:

A) -NH2

B) -OH

C) -X (halogens)

D) -R (alkyl groups)

53 / 100

Category: Chemistry Ch 1 Class 11

If you need to produce carbon dioxide from 12 grams of carbon, how many grams would you need?

32

4

16

8

54 / 100

Category: Chemistry Ch 11 Class 11

Methyl orange is _______ in acidic solutions.

NTS 2018
Chemistry
Acids, Bases and Salts
Elimination Tool:

A) Yellow

B) Pink

C) Orange

D) Red

55 / 100

Category: Chemistry Ch 11 Class 11

Activated complex is formed due to

PMC Sample 3
Chemistry
Reaction Kinetics
Elimination Tool:

A) Pressure

B) Temperature

C) Effective collision

D) Ineffective collision

56 / 100

Category: Chemistry Ch 4 Class 12

In rhombic sulphur there are atoms in each molecule?

7

8

6

9

57 / 100

Category: Chemistry Ch 4 Class 11

Crystal structure of diamond is

Trigonal

Tetrahedral

Cubic

None of these

58 / 100

Category: Chemistry Ch 14 Class 12

Which one of the following compounds is an additional polymer?

UHS 2019
Chemistry
Macromolecules
Elimination Tool:

A) Polyvinyl chloride

B) Nylon

C) Carbohydrate

D) Polyester

59 / 100

Category: Chemistry

The isomers due to the unequal distribution of carbon atoms on either side of the functional group belonging to the same homologous series are called:

NUMS Mock 2
Chemistry
Fundamental Principles of Organic Chemistry

A) Functional isomers

B) Position isomers

C) Chain isomers

D) Metamers

60 / 100

Category: Chemistry Ch 4 Class 11

Increasing the temperature of a liquid will decrease all except:

Surface tension

Density

Viscosity

Vapor pressure

61 / 100

Category: Chemistry Ch 10 Class 11

Definition of electrode potential is?

Tendency of metals to form ions when dissolved in 1M solution of its own solution

Tendency of ions to form atoms when dissolved in 1M solution of its metal

Both a and b

None of these

62 / 100

Category: Chemistry Ch 1 Class 11

Mass spectrometer is used to determine which of the following quantity?

) Atomic mases

Atomic number

Both a and b

None of these

63 / 100

Category: Chemistry Ch 2 Class 12

Group 1A and 11A are known as: ) s block elements d) P block elements

Alkali

Alkaline earth

) s block elements

P block elements

64 / 100

Category: Chemistry Ch 1 Class 11

27 g of Al will react with how much mass of O2 to produce Al2O3?

PMC Practice 22
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) 8g of oxygen

B) 16g of oxygen

C) 32g of oxygen

D) 24g of oxygen

65 / 100

Category: Chemistry Ch 6 Class 12

What is not true about transition metals?

They can make colored complexes

They have only one valency

They can be used as a catalyst d)

They are d block elements

66 / 100

Category: Chemistry Ch 11 Class 12

Phenol has all characters except?

Can be reduced to benzene

Insoluble in water

Acidic in nature

Used as a disinfectant

67 / 100

Category: Chemistry Ch 11 Class 12

Rectified spirits have a percentage of alcohol.

NUMS 2018
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) 12 %

B) 24 %

C) 95 %

D) 100 %

68 / 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

69 / 100

Category: Chemistry Ch 11 Class 12

Which of the following reactions is used for the production of alcohols on industrial scale?

UHS 2019
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) Hydrogenation of alkenes

B) Hydration of alkenes

C) Hydrohalogenation of alkenes

D) Hydroxylation of alkenes

70 / 100

Category: Chemistry Ch 9 Class 12

PolymerizatIon of ______ produces synthetic rubber.

PMC Sample 1
Chemistry
Hydrocarbons
Elimination Tool:

A) Formaldehyde

B) Choloropropene

C) Chloroform

D) Vinyl bromide

71 / 100

Category: Chemistry Ch 3 Class 12

Chemical formula of powder used in carom board is?

NaHCO3

H3B03

Na2CO3

K2CO3

72 / 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

73 / 100

Category: Chemistry Ch 3 Class 12

Ability of carbon to form long chains and rings is known as?

Catenation

Supplementation

Adulteration

Addition

74 / 100

Category: Chemistry Ch 15 Class 12

Ozone concentration is measured in:

UHS 2016
Chemistry
Environmental Chemistry
Elimination Tool:

A) Debye units

B) Dupont units

C) Debacle units

D) Dobson units

75 / 100

Category: Chemistry Ch 6 Class 11

Which of the following ions will show maximum hydration?

NTS 2016 SMBBMC
Chemistry
Chemical Bonding
Elimination Tool:

A) Mg+2

B) Na+1

C) Al+3

D) Ca+2

76 / 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

77 / 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.

78 / 100

Category: Chemistry Ch 1 Class 12

In Contact Process arsenic impurities act as poison for:

NUMS 2019 Reconduct
Chemistry
Periodicity in Elements
Elimination Tool:

A) Fe(OH)3

B) V2O5

C) Fe2O3

D) H2S2O7

79 / 100

Category: Chemistry

Q.138 Instantaneous rate of reaction is the rate at any

A. At Equilibrium

B. One instant

C. Given Temperature

D. Given Pressure

80 / 100

Category: Chemistry

For a sub shell I = 2 and m = -2, -1, 0 , +1, +2, it implies that it has ____ space orientation.

NUMS Mock 4
Chemistry
Atomic Structure

A) One

B) Two

C) Three

D) Five

81 / 100

Category: Chemistry Ch 10 Class 11

The Oxidation state of Alkali metals in any compound is?

PMC Sample 3
Chemistry
Electrochemistry
Elimination Tool:

A) 1

B) 2

C) 3

D) zero

82 / 100

Category: Chemistry Ch 10 Class 12

An SN2 reaction at an asymmetric carbon of a compound always gives:

NTS 2014
Chemistry
Alkyl Halides and Amines
Elimination Tool:

A) An metamerism of the substrate

B) A product with opposite optical rotation

C) A mixture of diastereomers

D) A single stereoisomer

83 / 100

Category: Chemistry Ch 13 Class 12

Nitriles (RCN), on hydrolysis, in the presence of a mineral acid yield:

UHS 2019
Chemistry
Carboxylic Acids and its Derivatives
Elimination Tool:

A) Ethers

B) Carboxylic acids

C) Aldehydes

D) Alcohols

84 / 100

Category: Chemistry Ch 11 Class 12

2-methyl 2-propanol is:

Secondary butyl alcohol

Tertiary butyl alcohol

Primary butyl alcohol

Quaternary butyl alcohol

85 / 100

Category: Chemistry Ch 9 Class 12

Catalytic hydrogenation of alkenes exhibits:

NUMS 2019 Cancelled
Chemistry
Hydrocarbons
Elimination Tool:

A) Substitution reaction

B) Elimination reaction

C) Addition reaction

D) Condensation reaction

86 / 100

Category: Chemistry Ch 12 Class 12

Treatment of propionaldehyde with Dil. the NaOH solution gives:

NUMS 2016
Chemistry
Aldehydes and Ketones
Elimination Tool:

A) CH3 CH2COOCH2C2H5

B) CH3 CH2 CHOH CH2 CH2 CHO

C) CH3 CH2 CH (OH) CH(CH3) CHO

D) CH3 CH2 COCH2 CH2 CHO

87 / 100

Category: Chemistry Ch 10 Class 12

Ethylamine can be prepared by the action of bromine and caustic potash on:

NUMS 2017
Chemistry
Alkyl Halides and Amines
Elimination Tool:

A) Acetamide

B) Propionamide

C) Formaide

D) Methyl cyanide

88 / 100

Category: Chemistry Ch 7 Class 12

The active part in organic molecules is called:

NUMS 2014
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) Homologous series

B) Functional group

C) Chemical bonding

D) Ionic complex

89 / 100

Category: Chemistry

NaNO3 on heating gives:

NUMS Mock 3
Chemistry
Periodicity in Elements

A) O2

B) NO2

C) O2 + NO2

D) NaNO2 + O2

90 / 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

91 / 100

Category: Chemistry Ch 5 Class 11

The number of electrons present in n=2 , l = 1 and m = 1, 0, -1 are:

NTS 2016 DUHS & JSMU
Chemistry
Atomic Structure
Elimination Tool:

A) 2

B) 6

C) 8

D) 10

92 / 100

Category: Chemistry Ch 6 Class 11

The substance which conducts electricity by the movement of ions:

NUMS 2014
Chemistry
Chemical Bonding
Elimination Tool:

A) Graphite

B) Copper

C) Molten NaCl

D) Mercury

93 / 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

94 / 100

Category: Chemistry Ch 15 Class 12

Which of the pair of gases is not a greenhouse gas?

NUMS 2019 Cancelled
Chemistry
Environmental Chemistry
Elimination Tool:

A) Carbon dioxide and methane

B) Carbon dioxide and nitric oxide

C) Nitrogen and oxygen

D) Water vapour and ozone

95 / 100

Category: Chemistry Ch 10 Class 12

Zwitter ion is formed when proton goes from:

NTS 2018
Chemistry
Alkyl Halides and Amines
Elimination Tool:

A) Amino to the carboxyl group

B) Carboxyl to an amino group

C) Carboxyl group only

D) Amino group only

96 / 100

Category: Chemistry Ch 8 Class 12

When CH2 = CH2 reacts with a halogen acid, the product formed is:

Alkyl halide

Alkane

Alkyl

Allcene

97 / 100

Category: Chemistry

Which of the following gas, when ignited, burns with a blue flame and is not very soluble in water?

NUMS Mock 4
Chemistry
s and p Block Elements
Environmental Chemistry

A) O2

B) CO2

C) N2

D) He

98 / 100

Category: Chemistry Ch 13 Class 12

Vinegar is basically acid:

Acetic

Citrus

Formic

Butyric

99 / 100

Category: Chemistry Ch 10 Class 11

In the electrolysis of molten ZnCl2, how much Zn can be deposited at the cathode by the passage of 0.01 ampere for one hour?

NUMS 2017
Chemistry
Electrochemistry
Elimination Tool:

A) 0.002 g

B) 0.123 g

C) 0.012 g

D) 0.004 g

100 / 100

Category: Chemistry

Q.111 Evaporation is a process?

A. Exothermic

B. Spontaneous

C. Non-Spontaneous

D. None of these

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