Chemistry Practice Tests 3

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Chemistry Practice Test 3

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1 / 100

Category: Chemistry Ch 2 Class 12

When alkali metal react with water the fire Is produced clue to:

Ions

Hydrogen gas

Water

None of these

2 / 100

Category: Chemistry

Q.108 Temperature and volume in an experiment are part of

A. Surroundings

B. System

C. State of a system

D. All of these

3 / 100

Category: Chemistry Ch 7 Class 12

Which one is NOT a nucleophile?

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

A) BH3

B) NH3

C) -NH2

D) -OH

4 / 100

Category: Chemistry

The bond, which is based on attractive forces between oppositely charged ions, is:

NUMS Mock 1
Chemistry
Chemical Bonding

A) Covalent bond

B) Dative bond

C) Ionic bond

D) Metallic bond

5 / 100

Category: Chemistry Ch 1 Class 12

Triads were introduced by

Newland

Dobreiner

Mendeleev

Al-Razi

6 / 100

Category: Chemistry Ch 10 Class 11

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

PbSO4

Pb

SO2

SO4

7 / 100

Category: Chemistry Ch 1 Class 11

Natural gas in homes burns in excess of oxygen, what is the limiting reactant in this case?

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

A) Oxygen

B) Natural gas

C) Air

D) There is no limiting reactant

8 / 100

Category: Chemistry Ch 1 Class 11

Isotopes are the atoms of same element having different number of _____.

PMC Practice 26
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) Electrons

B) Protons

C) Positrons

D) Neutrons

9 / 100

Category: Chemistry

Q.13 Alkali metals group lies in_________?

A.d-block

B. s-bloc

C.f- block

D.P-block

10 / 100

Category: Chemistry

When a charged particle is projected perpendicular to a magnetic field:

NUMS Mock 4
Physics
Electrostatics

A) Its path is circular in a plane perpendicular to the plane of magnetic field

B) The speed and kinetic energy of the particle remains constant

C) The velocity and momentum of the particle changes only in direction

D) The time period of revolution and angular frequency of revolution is independent of the velocity of the particle and radius of the circular path

11 / 100

Category: Chemistry Ch 15 Class 12

Genetic mutations occur in:

NUMS 2016
Chemistry
Chemistry of Life
Elimination Tool:

A) RNA

B) Protein

C) DNA

D) All of the above

12 / 100

Category: Chemistry

Q3___________is a macromolecule found in bold?

A. Hemoglobin

B. Plasma

C. creatinine

D. plasmids

13 / 100

Category: Chemistry Ch 14 Class 12

Polyester is used in:

PMC 2021 Tested
Chemistry
Macromolecules
Elimination Tool:

A) Cosmetic industry

B) Fabric industry

C) None of these

D) Food industry

14 / 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

15 / 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

16 / 100

Category: Chemistry Ch 11 Class 12

The strength of an acid depends on?

PreMedPK MDCAT Mock 5
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) Ease of removal of proton.

B) Stability of the anion formed.

C) Stability of the cation formed.

D) Depends on both ease of removal of proton and stability of the anion formed.

17 / 100

Category: Chemistry

Which of the following atoms would be diamagnetic?

Ne

O

Al

K

18 / 100

Category: Chemistry Ch 1 Class 11

The mass number of an atom is:

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

A) The number of electrons

B) The number of neutrons

C) The number of protons

D) The number of neutrons and protons

19 / 100

Category: Chemistry Ch 13 Class 12

Acetic acid derived from the word ‘Acetum’ which means_______?

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

A) Acetic acid

B) Bitter

C) Citric

D) Vinegar

20 / 100

Category: Chemistry Ch 11 Class 11

The process of bringing an element in use after its complete half-life is:

Rejuvenation

Revoking

Recycling

None of these

21 / 100

Category: Chemistry Ch 9 Class 12

Alkenes are:

PMC Sample 3
Chemistry
Hydrocarbons
Elimination Tool:

A) Electrophiles

B) Nucleophiles

C) Both Options are correct

D) None of these options is correct

22 / 100

Category: Chemistry Ch 15 Class 12

1500•degree Celsius furnace temperature Is maintained at which zone?

Heating

Burning

Decomposition

Roth b and c

23 / 100

Category: Chemistry Ch 7 Class 12

Which one is not an organic compound?

NUMS 2014
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) Fats

B) Water

C) Carbohydrates

D) None

24 / 100

Category: Chemistry Ch 8 Class 11

Le Chatelier’s principle explains effect of all of the following except

Pressure

Temperature

Concentration

Time

25 / 100

Category: Chemistry

The conversion of phenol to benzene in the presence of zinc involves:

NUMS Mock 3
Chemistry
Alcohol, Phenols, and Ethers

A) Oxidation

B) Reduction

C) Dehydroxylation

D) Dehydrogenation

26 / 100

Category: Chemistry Ch 13 Class 12

) Acetic acid is used in making

Leather shoes

Rubber shoes

Plastic shoe

None of thes

27 / 100

Category: Chemistry Ch 9 Class 12

The hybridization of benzene is:

sp3

sp2

sp

None of these

28 / 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

29 / 100

Category: Chemistry

Which of the following reaction takes place when acetone reacts with HCN?

NUMS Mock 4
Chemistry
Aldehydes and Ketones

A) Electrophilic addition

B) Nucleophilic elimination

C) Nucleophilic addition

D) Electrophilic addition

30 / 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

31 / 100

Category: Chemistry Ch 10 Class 12

In alkyl halide, the halide ion has charge on it when attached to C-atom.

Positive

Negative

Partial positive

Partial negative

32 / 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

33 / 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

34 / 100

Category: Chemistry Ch 7 Class 12

The rate of E1 reaction depends upon:

NTS 2019
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) The concentration of the substrate

B) The concentration of the nucleophile

C) The concenıration of the nucleophile and the substrate

D) The amount of the solvent used

35 / 100

Category: Chemistry Ch 11 Class 12

25 to 35 degree centigrade temperature is good for which of the following process?

Dow's method

Preparation of formalin

Fermentation

Methanol

36 / 100

Category: Chemistry

Q.26 A polymer called Bakelite is formed by reaction of phenol with

A. hydrogen

B. ethers

C. carboxylic acid

D. formaldehyde

37 / 100

Category: Chemistry Ch 16 Class 12

The best yield of 502 can be obtained by which of the following:

Burning of coal

Excess of oxygen

Fertilization

Oxides of pyrites

38 / 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

39 / 100

Category: Chemistry Ch 9 Class 12

What happens when one mole of ethane is mixed in the dark at room temperature with six moles of chlorine?

NTS 2017
Chemistry
Hydrocarbons
Elimination Tool:

A) There is no reaction.

B) CH3CH2Cl and HCl are formed.

C) CH3CCl3 and HCl are formed.

D) CCl3CCl3 and HCl are formed.

40 / 100

Category: Chemistry Ch 1 Class 11

The unit used to express the relative atomic mass is called

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

A) Gram unit

B) Avogadro's number

C) Atomic mass

D) Atomic mass unit

41 / 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

42 / 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

43 / 100

Category: Chemistry Ch 6 Class 11

H2O has a higher boiling point than HF because:

NTS 2015 DUHS and JSMU
Chemistry
Chemical Bonding
Elimination Tool:

A) H2O is more polar than HF

B) H2O can form more hydrogen bonds

C) H2O has higher molecular weight

D) H2O has more atoms

44 / 100

Category: Chemistry Ch 14 Class 12

Which of the following is a monosaccharide ?

Maltose

Sucrose

lactose

Fructose

45 / 100

Category: Chemistry Ch 4 Class 12

F-block elements are called?

PMC Practice 1
Chemistry
d and f Block Elements
Elimination Tool:

A) Inner transition

B) Outer transition

C) Both

D) None

46 / 100

Category: Chemistry Ch 13 Class 12

Lysine is a
amino acid

Acidic

Basic

Neutral

Amphoteric

47 / 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

48 / 100

Category: Chemistry Ch 7 Class 11

Work done on the system is

PMC Sample 1
Chemistry
Thermochemistry
Elimination Tool:

A) Negative

B) depends upon Boundary Conditions

C) Positive

D) Zero

49 / 100

Category: Chemistry

Q.119 Caustic Soda is made by electrolysis of concentrated solution of NaCI in

A. Nelson's Cell

B. Hg-Cell

C. Castner Kellner Cell

D. All of these

50 / 100

Category: Chemistry Ch 13 Class 12

Amino acid is usually known by a

Common name

IUPAC name

Both a and b

None of these

51 / 100

Category: Chemistry Ch 8 Class 12

Which gas among the following can be dried by bubbling in H2S04?

Ammonia gas

HCI gas

Ethyne

Oxygen gas

52 / 100

Category: Chemistry Ch 8 Class 12

Unsaturated Compound containing double bond is:

Alkane

Alkene

Alkyne

Alkylene

53 / 100

Category: Chemistry

Q. 89 The number of formula units in 125g of hydrated copper sulphate (CuSO4.5H2O) are (Cu = 64, S = 32)

A. 6.023×1023

C. 1.2044×1024

B. 3.011×1023

D. 6.023×1022

54 / 100

Category: Chemistry Ch 6 Class 12

Which of the following has the lowest boiling point?

Titanium

Chromium

Manganese

Vanadium

55 / 100

Category: Chemistry Ch 4 Class 11

Which of the following compound has the highest boiling point?

Water

HCL

Ammonia

HF

56 / 100

Category: Chemistry Ch 10 Class 11

Both a and c What is the oxidation number of S in SO2^(-2)?

6

2

— 6

8

57 / 100

Category: Chemistry Ch 15 Class 12

What is used in cement manufacture?

Limestone

Starch

Potassium Oxide

Both a and b

58 / 100

Category: Chemistry Ch 16 Class 12

Treatment of water which is very effective in killing of pathogens is:

Aeration

Coagulation

Landfill

Chlorine usage

59 / 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

60 / 100

Category: Chemistry

Q.22 The unhybridized p orbitals of benzene are present in the form of ?

A. Between the C-C bonds of benzene

B. Above and below the carbon bonds

C. In the form of cloud above and below the benzene ring

D. None of these

61 / 100

Category: Chemistry Ch 11 Class 12

Which of the following is not a derivative of benzene?

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

A) Pyrrole

B) Furan

C) Thiophene

D) All

62 / 100

Category: Chemistry Ch 11 Class 12

Alkoxicies react with alkyl halide to form? a

Ether

Ester

Carboxylic acid

alcohol

63 / 100

Category: Chemistry Ch 4 Class 12

In rhombic sulphur there are atoms in each molecule?

7

8

6

9

64 / 100

Category: Chemistry Ch 14 Class 12

Adipic acid and Hexamethylene dlamine combine to form?

Nylon-6,6

Epoxy Resin

Polystyrene

Polyvinyl chloride

65 / 100

Category: Chemistry Ch 3 Class 11

Gases behave ideal at

Low pressure and High temperature

low pressure and Low temperature

High temperature and Low pressure

High temperature and High pressure

66 / 100

Category: Chemistry

Stronger the oxidizing agent, higher is the:

NUMS Mock 2
Chemistry
Electrochemistry

A) Emf of cell

B) Oxidation potential

C) Reduction potential

D) Redox potential

67 / 100

Category: Chemistry Ch 11 Class 12

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

PreMedPK MDCAT Mock 5
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

68 / 100

Category: Chemistry Ch 1 Class 11

_______ is a macromolecule found in blood.

PMC Practice 23
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) Hemoglobin

B) Plasma

C) Creatinine

D) Plasmids

69 / 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

70 / 100

Category: Chemistry Ch 1 Class 12

NaNO3 on heating gives:

NUMS 2015
Chemistry
Periodicity in Elements
Elimination Tool:

A) O2

B) NO2

C) O2 + NO2

D) NaNO2 + O2

71 / 100

Category: Chemistry Ch 14 Class 12

Which is the structure of polyvinyl chloride (polychloroethane)?

UHS 2018
Chemistry
Macromolecules
Elimination Tool:

A) -[CCl2-CCl2]-

B) -[HCCl-CH-Cl]-

C) [H2C=CH-Cl]

D) -[H2C-CH-Cl]-

72 / 100

Category: Chemistry Ch 13 Class 12

Which of the following acid solutions is used for the seasoning of food?

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

A) Butyric acid

B) Phthalic acid

C) Lactic acid

D) Acetic acid

73 / 100

Category: Chemistry Ch 3 Class 12

The formula of cryolite is

Na2AIF6

Na3AIF3

Na3AIF6

Na2AlCl6

74 / 100

Category: Chemistry Ch 1 Class 11

Actual yield is always experimental yield.

Less than

More than

Same as

None of the above

75 / 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

76 / 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

77 / 100

Category: Chemistry Ch 4 Class 11

Change in extensive property is proportional to the change in ______ of material.

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

A) Temperature

B) Volume

C) Quantity

D) Pressure

78 / 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

79 / 100

Category: Chemistry Ch 14 Class 12

The polymer containing acrylonitrile as a monomer is:

PMC 2021 Tested
Chemistry
Macromolecules
Elimination Tool:

A) Polyacrylonitrile

B) Rayon fibre

C) PVC

D) Teflon

80 / 100

Category: Chemistry

Q.158 Reduction of alkyl halides in the presence of Zn and mineral acid Produces______________ ?

A. Alkenes

B. Alkanes

C. Alkynes

D. Alcohols

81 / 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

82 / 100

Category: Chemistry

The reaction between borohydride

Nucleophilic substitution

Electrophilic substitution

Electrophilic addition

d) Both a and c

83 / 100

Category: Chemistry Ch 7 Class 11

Thermochemistry is very important to learn about

PMC Sample 1
Chemistry
Thermochemistry
Elimination Tool:

A) Chemical Equilibrium

B) Chemical Bonding

C) Heat contents of a compound

D) All of these

84 / 100

Category: Chemistry

Q.33 Rate constant is denoted by?

A. k

B. kr

C. kv

D.ks

85 / 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

86 / 100

Category: Chemistry Ch 6 Class 11

Which of the following is the correct order of electronegativity (from highest to lowest)?

NTS 2015 SMBBMC
Biology
s and p Block Elements
Chemical Bonding
Elimination Tool:

A) F , O, N , C

B) N, F , O, C

C) C, F, N, O

D) C, F, O, N

87 / 100

Category: Chemistry Ch 7 Class 12

Which of the following compounds has the empirical formula, (CH2O) and reacts with sodium hydroxide?

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

A) Carbonic acid

B) Ethanol

C) Acetic acid

D) Methanoic acid

88 / 100

Category: Chemistry

Q.124 The organic acid with the highest pKa value is

A. Chloroethanoic acid

B. Dichloroethanoic acid

C. Trichloroethnoic acid

D. Nitroethanoic acid

89 / 100

Category: Chemistry Ch 9 Class 12

Which of the following compounds will form a hydrocarbon on reaction with Grignard reagent?

NUMS 2014
Chemistry
Hydrocarbons
Elimination Tool:

A) CH3CH2OH

B) CH3COOCH3

C) CH3COCH3

D) CH3CHO

90 / 100

Category: Chemistry

Q86 : Which of the following is most ionic in nature

A. Sodium chloride

B. Sodium fluoride

C. Sodium bromide

D. Sodium iodide

91 / 100

Category: Chemistry Ch 3 Class 11

Choose the correct statement:

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

A) Diamond is the hardest and graphite is softest

B) Graphite is the hardest while lamp black is softest

C) Coal is the hardest and coke is softest

D) Diamond is the hardest and coke is softest

92 / 100

Category: Chemistry

Which of the following has the correct order in terms of increasing acidity?

NUMS Mock 1
Chemistry
Acids, Bases and Salts

A) HI < HBr < HCl < HF

B) CH4< NH3< H2O < HF

C) Both of the above options

D) Cannot be determined

93 / 100

Category: Chemistry

Q.128 Which of the following element is not usually present in all proteins?

A. Carbon

B. Hydrogen

C. Nitrogen

D. Sulphur

94 / 100

Category: Chemistry Ch 10 Class 12

Reaction of CH3CH2MgBr with ethylene epoxide gives:

NUMS 2019 Reconduct
Chemistry
Alkyl Halides and Amines
Elimination Tool:

A) Ethanal

B) 1 – butanol

C) 2 – butanol

D) Butane

95 / 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

96 / 100

Category: Chemistry Ch 2 Class 12

Which one of the following statements is true?

NUMS 2016
Chemistry
s and p Block Elements
Elimination Tool:

A) All nitrates of Group II metals are decomposed by heat to give the oxide NO2.

B) Aqueous sodium nitrate in acidic to litmus.

C) Aqueous ammonium nitrate is alkaline to litmus.

D) The alkali metal nitrates are insoluble in water.

97 / 100

Category: Chemistry Ch 3 Class 11

Gases can be converted into liquid by:

Increasing temperature and decreasing pressure

Decreasing temperature and increasing pressure

Same temperature and pressure

Increasing pressure and temperature

98 / 100

Category: Chemistry Ch 12 Class 12

Which class of the compounds is represented by the type formula ROR?

NUMS 2017
Chemistry
Aldehydes and Ketones
Elimination Tool:

A) Esters

B) Ethers

C) Aldehydes

D) Ketones

99 / 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

100 / 100

Category: Chemistry

Q.161 Which one of the following has positive value?

A. Heat lost by the system

B. Work done on the system

C. Work done by the system

D. Positive AE when heat lost by the system

Your score is

The average score is 56%

0%

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