Chemistry Practice Tests 4 - PLS Academy

Chemistry Practice Test 4

Chemistry Practice Test 4 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 electrochemistry, redox reactions, solutions, and molarity calculations, helping students improve accuracy and problem-solving skills.

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Chemistry Practice Test 4

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1 / 100

Category: Chemistry Ch 5 Class 11

The electronic configuration of iron is:

NTS 2011
Chemistry
Atomic Structure
Elimination Tool:

A) 1s2 , 2s2 , 2p6 , 3s2 , 3p6 , 3d5 , 4s2

B) 1s2, 2s2 , 2p6 , 3s2 , 3p6 , 3d5, 4s1

C) 1s2 , 2s2, 2p6 , 3s2 , 3p6 , 3d6 , 4s2

D) 1s2 , 2s2 , 2p6 , 3s2 , 3p6 , 3d3 , 4s2

2 / 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

3 / 100

Category: Chemistry Ch 2 Class 11

The efficiency of chemical reaction can be expressed as:

PMC 2020
Chemistry
Stoichiometry
Elimination Tool:

A) Theoretical yield

B) Actual yield

C) % yield

D) Maximum yield

4 / 100

Category: Chemistry

Q.73 The unit used to express the relative atomic mass is called

A. Gram unit

B. Avogadro's number

C. Atomic mass

D. Atomic mass unit

5 / 100

Category: Chemistry Ch 11 Class 12

Which is more soluble in ethanol?

chlorine

Calcium carbonate

Potassium chloride

Propane

6 / 100

Category: Chemistry

Q.107 I is an example of___________?

A. Electrophilic group

B. Nucleophile

C. Leaving group

D. Both nucleophile and leaving group

7 / 100

Category: Chemistry Ch 7 Class 12

Which process is used to produce volatile compounds?

Reforming

Cracking

Polymerization

Distillation

8 / 100

Category: Chemistry Ch 6 Class 11

The number of bond(s) between carbon and nitrogen atoms in a Nitrile is:

NTS 2018
Chemistry
Chemical Bonding
Elimination Tool:

A) One sigma and one pi

B) Two sigma and one pi

C) Only sigma

D) One sigma and two pi

9 / 100

Category: Chemistry

Iso-Butyl alcohol has following carbon attached to hydroxyl group:

NUMS Mock 3
Chemistry
Alcohol, Phenols, and Ethers

A) Tertiary

B) Secondary

C) Quaternary

D) Primary

10 / 100

Category: Chemistry Ch 2 Class 11

The molecular formula expresses?

NTS 2015 SMBBMC
Chemistry
Stoichiometry
Elimination Tool:

A) Relative number of atoms and electrons

B) actual number of atoms

C) both relative and actual number of atoms

D) none of the above

11 / 100

Category: Chemistry Ch 7 Class 11

The enthalpy change accompanying the gain of an electron by a neutral gaseous atom to form a negative ion is called:

NTS 2010
Chemistry
Thermochemistry
Elimination Tool:

A) Ionization potential

B) Electronegativity

C) Electron affinity

D) Lattice energy

12 / 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

13 / 100

Category: Chemistry Ch 13 Class 12

Which of the following is most soluble in water?

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

A) Ethanoic acid

B) Pentanoic acid

C) Hexanoic acid

D) Butanoic acid

14 / 100

Category: Chemistry Ch 16 Class 12

Which of the following gases has least concentration in air a

CO2

15 / 100

Category: Chemistry Ch 2 Class 12

7) Gypsum supplies to soil

Carbon

Sulpuhr

Nitrogen

Calcium

Both b and d

16 / 100

Category: Chemistry Ch 7 Class 11

Which of the following condition is constant in Bomb calorimeter?

PMC Practice 1
Chemistry
Thermochemistry
Elimination Tool:

A) Pressure

B) Volume

C) Temperature

D) All of these

17 / 100

Category: Chemistry

Which of the following shows the Planck’s quantum theory?

NUMS Mock 3
Chemistry
Atomic Structure

A) E = hcv

B) E = c/v

C) E = cv

D) None of these options are correct

18 / 100

Category: Chemistry Ch 3 Class 11

According to the general gas equation, density of an ideal gas depends upon:

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

A) Pressure

B) Temperature

C) Molar Mass

D) All of these

19 / 100

Category: Chemistry Ch 14 Class 12

Graphite has a structural similarity with:

PMC Practice 2
Chemistry
Macromolecules
Elimination Tool:

A) B2H6

B) B4C

C) B

D) BN

20 / 100

Category: Chemistry Ch 10 Class 11

The oxidation number of Br in Br2 is:

NTS 2019
Chemistry
Electrochemistry
Elimination Tool:

A) -1

B) -2

C) 0

D) +1

21 / 100

Category: Chemistry Ch 5 Class 11

Spectrum of which series is in the UV region?

Lyman serie

Balmer series

Paschen series

Pfund series

22 / 100

Category: Chemistry Ch 1 Class 11

Mass spectrometer can be used to find:

Mass of atom

Mass of ion

Charge to mass ratio of atom

Charge to mass ratio of ion

23 / 100

Category: Chemistry Ch 10 Class 12

Reaction by Grignard reagent are mostly

Exothermic

Endothermic

Room temperature

Is highly reactive by both endothermic and exothermic

24 / 100

Category: Chemistry Ch 12 Class 12

H —CHO is:

Formaldehyde

Acetaldehyde

Ketone

Ester

25 / 100

Category: Chemistry Ch 1 Class 12

Who started the development of the First Periodic Table?

) Antoine Bequerel

Dimitri Mendeleev

Robert Boyle

John Newlands

26 / 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?

PreMedPK MDCAT Mock 1
Chemistry
Hydrocarbons
Elimination Tool:

A) Structural isomerism

B) Functional isomerism

C) Chain isomerism

D) Metamerism

27 / 100

Category: Chemistry Ch 7 Class 11

Some substances lack definite heats of fusion. These substances are:

NUMS 2020
Chemistry
Thermochemistry
Elimination Tool:

A) Isomorphs

B) Polymorphs

C) Amorphous solids

D) Crystalline solids

28 / 100

Category: Chemistry Ch 7 Class 11

Given the bond energy N ≡ N, N – H and H – H bonds are 945, 391, and 436 kJmol-1 respectively, the enthalpy of the reaction N2 (g) + 3H2(g) -> 2NH3 (g) is;

NUMS 2017
Chemistry
Thermochemistry
Elimination Tool:

A) -93 kJ

B) 102 kJ

C) 90 kJ

D) 105 kJ.

29 / 100

Category: Chemistry

The reduction of nitrile produced a compound of formula C3H7NH2. Which one of the following compounds would be produced if the same nitrile was hydrolyzed by heating with dilute hydrochloric acid?

NUMS Mock 4
Chemistry
Alkyl Halides and Amines

A) CH3CONH2

B) CH3CH2NH2

C) (CH3)2CHCO2H

D) CH3CH2CO2H

30 / 100

Category: Chemistry

Q.34 Which of these have a positive value of enthalpy?

A. Combustion

B. Neutralization

C. Atomization

D. All of these

31 / 100

Category: Chemistry Ch 6 Class 11

which type of hybridization doesn’t exist?

Sp4

Sp3

Sp2

32 / 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

33 / 100

Category: Chemistry Ch 12 Class 12

IUPAC Name of formaldehyde is

Ethanol

Methanal

c) Ethanol

Methyl alcohol

34 / 100

Category: Chemistry Ch 11 Class 11

For which of the following order of the reaction, rate of reaction is inversely proportional to the concentration reaction?

PMC 2020
Chemistry
Reaction Kinetics
Elimination Tool:

A) 1st order reaction

B) 2nd order reaction

C) Negative order of reaction

D) Zero order of reaction

35 / 100

Category: Chemistry Ch 13 Class 12

In the case of HOCH2CH2CH2COOH, from where is numbering started?

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

A) OH group is given number 1 position

B) Carboxylic acid is given number 1 position

C) COOH is given number 3 position

D) COOH is given number 4 position

36 / 100

Category: Chemistry Ch 4 Class 11

At 1489 mm of Hg, water will boil at:

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

A) 120 C

B) 110 C

C) 100 C

D) 90 C

37 / 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

38 / 100

Category: Chemistry Ch 2 Class 12

The flame colour of Ca in flame test is:

NUMS 2020
Chemistry
s and p Block Elements
Elimination Tool:

A) Orange red

B) Golden yellow

C) Red

D) Pink

39 / 100

Category: Chemistry Ch 11 Class 12

By fermentation process of starch and by the catalytic enzyme, ______ is produced.

NUMS 2018
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) Methyl alcohol

B) Ethyl alcohol

C) Acetyl alcohol

D) Methanal

40 / 100

Category: Chemistry

Q.78 Here DH° is enthalpy of

A. Combustion

B. Formation

C. Neutralization

D. Solution

41 / 100

Category: Chemistry

Strongest acid among the following is:

NUMS Mock 3
Chemistry
Carboxylic Acids and its Derivatives

A) HCOOH

B) CH3COOH

C) (CH3)2 CHCOOH

D) (CH3)3CCOOH

42 / 100

Category: Chemistry Ch 5 Class 11

How many electrons can have the values n=2, l=1, and s=+½ in the configuration 1s2, 2s2, 2p3?

NTS 2015 DUHS and JSMU
Chemistry
Atomic Structure
Elimination Tool:

A) 1

B) 3

C) 5

D) 7

43 / 100

Category: Chemistry Ch 10 Class 12

RMgX is an organometallic compound, generally known as:

NTS 2012
Chemistry
Alkyl Halides and Amines
Elimination Tool:

A) Grignard's Reagent

B) Baeyer's Reagent

C) Ether

D) Ester

44 / 100

Category: Chemistry Ch 4 Class 12

Gas which has percentage equal to 78% In air Is the

Oxygen

Hydrogen

Carbon dioxide

Nitrogen

45 / 100

Category: Chemistry Ch 7 Class 11

Enthalpy of a compound is equal to its

NUMS 2016
Chemistry
Thermochemistry
Elimination Tool:

A) Heat of combustion

B) Heat of formation

C) Heat of solution

D) Heat of dilution

46 / 100

Category: Chemistry

Q.76 Which of the following methods .used to prepare acetic acid?

A. Distillation

B. Fermentation

C. Dehydration

D. Ozon lysis

47 / 100

Category: Chemistry Ch 15 Class 12

Which one of the following polymer is called as Nylon 6,6?

UHS 2016
Chemistry
Industrial Chemistry
Elimination Tool:

A) Polyester

B) Polyvinyl chloride

C) Polyamide

D) Polyvinyl acetate

48 / 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

49 / 100

Category: Chemistry Ch 14 Class 12

What is the chemical reaction mechanism by which cells make polymers from monomers?

PMC 2021 Tested
Chemistry
Macromolecules
Elimination Tool:

A) Dehydration reaction

B) Formation of disulphide bridges

C) Ionic bonding of monomers

D) Hydrolysis

50 / 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

51 / 100

Category: Chemistry Ch 15 Class 12

Which in not woody raw material

Poplar

) Hard wood

Fir

Rag

52 / 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

53 / 100

Category: Chemistry Ch 8 Class 12

Formula of Thionyl chloride is

SCI3

S2Cl2

SOCl2

SOCI3

54 / 100

Category: Chemistry

Which is the correct electronic configuration of Chromium (24Cr)?

NUMS Mock 2
Chemistry
d and f Block Elements

A) 1s2, 2s2, 3s2, 2p6, 3p6, 4s2, 3d6

B) 1s2, 2s2, 2p6, 3s2, 3p6, 4s2, 3d4

C) 1s1, 2s2, 2p6, 3s2, 3p6, 3d6

D) 1s2, 2s2, 2p6, 3s2, 3p6, 4s1, 3d5

55 / 100

Category: Chemistry Ch 10 Class 12

Which of the following Alkyl Halide is most reactive?

RCL

RBr

56 / 100

Category: Chemistry Ch 15 Class 12

The temperature zones In rotary kilns are:

None of these

57 / 100

Category: Chemistry

Choose the correct statement:

NUMS Mock 3
Chemistry
States of Matter – Gases, Liquids and Solids

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

58 / 100

Category: Chemistry

The osmotic pressure of equimolar solutions of BaCl2, NaCl and sucrose will be in the order:

NUMS Mock 1
Chemistry
Solution and Colloids

A) Sucrose > NaCl > BaCl2

B) Sucrose > BaCl2 > NaCl

C) NaCl > BaCl2 > Sucrose

D) BaCl2 > NaCl > Sucrose

59 / 100

Category: Chemistry Ch 2 Class 12

What is the chemical formula for plaster of Paris?

NTS 2010
Chemistry
s and p Block Elements
Elimination Tool:

A) CuSO4. 5H2O

B) 2CaSO4. 2H2O

C) (CaSO4)2 H2O

D) MgSO4. 7H2O

60 / 100

Category: Chemistry Ch 13 Class 12

In esterification, alcohol reacts with:

Acetaldellye

Halogens

Carboxylic acid

None

61 / 100

Category: Chemistry Ch 9 Class 11

Percentage of weight of NaCI if 2g NaCI is dissolved in 18g water

62 / 100

Category: Chemistry

Q114.The least acidic alcohol is

A. n-Butanol

B. Propanol

C. Ethanol Ethanol

D. Methanol Methanol

63 / 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

64 / 100

Category: Chemistry

Q.132 Cyclic compounds consist of except?

A. Alicyclic

B. Aromatic

C. Acyclic compounds

D. Carbocyclic compounds

65 / 100

Category: Chemistry Ch 3 Class 12

If a person is injected by shot of a gun and all the bullets are not removed from his body, it may cause poisoning by:

NUMS 2017
Chemistry
d and f Block Elements
Elimination Tool:

A) Hg

B) Pb

C) Fe

D) As

66 / 100

Category: Chemistry Ch 9 Class 12

n-Heptane can be converted into benzene by catalysts:

Al203, Si02, Fe203

Si02, K20, Cr203

Al203,Si02, Cr203

None of these

67 / 100

Category: Chemistry Ch 8 Class 11

1 mole of N2O4 (g) was placed in an empty 1 dm^3 container and allowed to reach equilibrium according to the following equation:

N2O4(g) 2NO2(g)

At equilibrium, x mole Of N2O4 (g) had dissociated. What is the value of the equilibrium constant, Kc, at the temperature of the Experiment?

NTS 2016 SMBBMC
Chemistry
Chemical Equilibrium
Elimination Tool:

A) 2x / ( 1 – x)

B) 4×2 / (1 – x)2

C) 2x / (1 – x )2

D) 4×2 / (1 – x)

68 / 100

Category: Chemistry

Q.160 Polymerization of ethene produces which of the followving polymer?

A. Polyvinyl

B. Polethyl

C. Polyethylene

D. Polyethoxy

69 / 100

Category: Chemistry Ch 9 Class 12

Which one of the following organic compounds have the least carbon-carbon bond length?

NUMS 2017
Chemistry
Hydrocarbons
Elimination Tool:

A) Ethene

B) Ethane

C) Ethyne

D) Methane

70 / 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

71 / 100

Category: Chemistry Ch 4 Class 11

Hybridization in diamond is

sp2

sp3

dsp2

72 / 100

Category: Chemistry Ch 7 Class 11

Transfer of heat from hot surroundings to a cold refrigerator is an example of:

NUMS 2014
Chemistry
Thermochemistry
Elimination Tool:

A) Spontaneous reaction

B) Non-Spontaneous reaction

C) First law of thermodynamics

D) All of the above options are correct

73 / 100

Category: Chemistry Ch 14 Class 12

Polymerization of ethene produces which of the following polymers?

PMC Practice 3
Chemistry
Macromolecules
Elimination Tool:

A) Polyvinyl

B) Polethyl

C) Polyethylene

D) Polyethoxy

74 / 100

Category: Chemistry Ch 12 Class 12

What one is the correct geometry of acetal?

PreMedPK MDCAT Mock 3
Aldehydes and Ketones
Elimination Tool:

A) Trigonal

B) Linear

C) Tetrahedral

D) Square planer

75 / 100

Category: Chemistry Ch 5 Class 12

Which of the following halogen does not form stable oxyacids?

76 / 100

Category: Chemistry Ch 2 Class 12

The nitrides of alkaline earth metals hydrolyse with water to form:

NUMS 2020
Chemistry
s and p Block Elements
Elimination Tool:

A) NH3

B) H2

C) N2

D) NO

77 / 100

Category: Chemistry Ch 13 Class 12

Chemical formula of MaIonic Acid is?

C3H4O4

C4H4O4

C6H10O4

C5H10O4

78 / 100

Category: Chemistry Ch 10 Class 11

Which of the following exhibits an oxidation state of -3?

79 / 100

Category: Chemistry Ch 1 Class 12

Variable valency is shown by which of the following elements?

80 / 100

Category: Chemistry Ch 5 Class 11

If an electron jumps from fourth to first orbit, which of the following series will it show?

Lyman

Balmer

Pfund

None of these

81 / 100

Category: Chemistry Ch 8 Class 12

CH ≡ CH + 2AgNO3 -> AgC ≡ CAg + 2HNO3 represents _____ property of acetylene.

NTS 2012
Chemistry
Hydrocarbons
Elimination Tool:

A) basic

B) acidic

C) dehydrating

D) physical

82 / 100

Category: Chemistry Ch 14 Class 12

Disposable cups are made of a polymer ‘polystyrene’. Polystyrene is:

UHS 2019
Chemistry
Macromolecules
Elimination Tool:

A) A polyamide

B) A condensation polymer

C) An addition polymer

D) A polyester

83 / 100

Category: Chemistry Ch 1 Class 11

If we are given the mass of a substance ,we can calculate the_______ of the other substance with the help of a balanced chemical equation.

Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) Mass

B) Volume

C) Moles

D) All of these

84 / 100

Category: Chemistry Ch 10 Class 12

The reaction 2RX + 2Na -> RR + 2NaX is an example of:

NUMS 2017
Chemistry
Alkyl Halides and Amines
Elimination Tool:

A) Cannizaro’s reaction

B) Kolbe’s reaction

C) Sabatier & Senderen’s reaction

D) Wurtz reaction

85 / 100

Category: Chemistry

Maleic Acid and Fumaric Acid are:

NUMS Mock 3
Chemistry
Fundamental Principles of Organic Chemistry

A) Cis-Trans isomers

B) chain isomers

C) position isomers

D) metamers

86 / 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

87 / 100

Category: Chemistry Ch 11 Class 12

Methylated spirit Is % methanol and % ethanol:

5 and 95

20 and 80

60 and 40

50 and 50

88 / 100

Category: Chemistry Ch 11 Class 12

Which of the following is an insecticide?

PreMedPK MDCAT Mock 1
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) DDT

B) Teflon

C) Iodoform

D) Dynamite

89 / 100

Category: Chemistry Ch 15 Class 12

Bacteria plays an important role in:

PMC 2021 Tested
Chemistry
Environmental Chemistry
Elimination Tool:

A) Phosphorus Cycle

B) Nitrogen Cycle

C) Carbon Cycle

D) All of these

90 / 100

Category: Chemistry Ch 12 Class 12

– ROR is the nucleophile of

NTS 2011
Chemistry
Aldehydes and Ketones
Elimination Tool:

A) Alcohols

B) Esters

C) Cyanides

D) Ethers

91 / 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

92 / 100

Category: Chemistry

Q.98 In SNa reactions, the hybridization of carbon in moving from substart to transition state changes from?

A. Sp2 to sp3

B. sp to sp2

C.Sp to Sp

D. sp2 to sp3

93 / 100

Category: Chemistry Ch 15 Class 12

The crude petroleum is separated in fraction by:

PMC Practice 4
Chemistry
Industrial Chemistry
Elimination Tool:

A) Filtration

B) Fractional distillation

C) Steam distillation

D) Fractional sublimation

94 / 100

Category: Chemistry Ch 14 Class 12

Ethylene is a monomer of polyethylene that is widely used as raw material for manufacturing plastics. It can be polymerized into two different classes: HDPE and LDPE. The following choices are the differences of HDPE and LDPE except:

NUMS 2019 Cancelled
Chemistry
Macromolecules
Elimination Tool:

A) The density

B) The branching of ethylene

C) Reaction conditions

D) Type of polymerization

95 / 100

Category: Chemistry Ch 4 Class 12

The formula of Chile Peter salt is

NaCI

NaNO3

NaOH

NaNO4

96 / 100

Category: Chemistry Ch 11 Class 12

The method which is used on an industrial scale for production of alcohol from alkene is:

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

A) Hydrohalogenation of alkenes

B) Dehydration of alkenes

C) Hydration of alkenes

D) Hydroxylation of alkenes

97 / 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

98 / 100

Category: Chemistry Ch 5 Class 11

The maximum possible number of electrons a shell ‘n’ can accommodate is given by:

NTS 2012
Chemistry
Atomic Structure
Elimination Tool:

A) n

B) n2

C) 2n2

D) n3

99 / 100

Category: Chemistry Ch 4 Class 11

H2 and O2 are diffusing under the same condition how much H2 gas will diffuse?

NUMS 2017
Chemistry
States of Matter – Gases, Liquids and Solids
Elimination Tool:

A) 4

B) 16

C) 32

D) 0.5

100 / 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

Your score is

The average score is 57%

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