Chemistry Practice Tests 2

Created by Ali Durrani

NET Practice

Chemistry Practice Test 2

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1 / 100

Category: Chemistry Ch 13 Class 12

Which type of carboxylic acid is produced from the hydrolysis of nitriles?

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

A) Beta-hydroxy carboxylic acids

B) Acids, having one carbon more than the starting material

C) Acids having one carbon less than the starting material

D) Alpha-hydroxy acids

2 / 100

Category: Chemistry Ch 8 Class 11

Purification of table salt (NaCl) by passing HCl gas through its saturated aqueous solution is an example of:

PMC 2020
Chemistry
Chemical Equilibrium
Elimination Tool:

A) Law of mass action

B) Hess’s law

C) Common ion effect

D) Henry’s law

3 / 100

Category: Chemistry Ch 7 Class 12

Which class of compounds cannot show positional isomerism?

PMC Sample 1
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) alkane

B) alkene

C) alkyne

D) alcohol

4 / 100

Category: Chemistry Ch 4 Class 12

Paramagnetic elements contain:

NTS 2019
Chemistry
d and f Block Elements
Elimination Tool:

A) All paired electrons

B) All unpaired electrons

C) Few unpaired electrons.

D) Unequal electrons and protons

5 / 100

Category: Chemistry Ch 2 Class 12

Which of the following statements is true?

NUMS 2014
Chemistry
s and p Block Elements
Elimination Tool:

A) Alkali metal hydroxides are stable to heat except LiOH

B) CaOH is a stronger base than NaOH

C) When NaOH is made the gas released at the cathode is C12

D) NaOH is named as caustic soda because it reacts with fats to form soap.

6 / 100

Category: Chemistry Ch 8 Class 12

Molecular Formula of Propane is:

C3H8

C4H10

C6H12

C7H14

7 / 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

8 / 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

9 / 100

Category: Chemistry Ch 8 Class 11

The change in concentration of reactant or product per unit time is called:

NTS 2016 DUHS & JSMU
Chemistry
Chemical Equilibrium
Elimination Tool:

A) Rate constant

B) Rate of reaction

C) Rate equation

D) Rate law

10 / 100

Category: Chemistry Ch 14 Class 12

Which of the following is not a part of the human diet?

Glucose

Sucrose

Fructose

Cellulose

11 / 100

Category: Chemistry Ch 12 Class 12

Meta-formaldehyde molecule has Oxygen MOMS:

One

Two

Three

Five

12 / 100

Category: Chemistry Ch 9 Class 11

Definition of Raoult’s law is,

The lowering of vapor pressure is equal to the mole fraction of solute

The relative lowering of vapor pressure is directly proportional to the mole fraction of solute.

The relative lowering of vapor pressure is equal to the mole fraction of solute

The relative lowering vapor pressure is equal to the mole fraction of solvent

13 / 100

Category: Chemistry Ch 5 Class 11

Which of the following is the electronic configuration of 19K?

NUMS 2016
Chemistry
Atomic Structure
Elimination Tool:

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

B) 1s2, 2s2, 2p6, 3s2, 3p6, 3s2, 3d1

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

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

14 / 100

Category: Chemistry Ch 11 Class 12

The strongest acid among the following is?

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

A) Carbolic acid

B) H2O

C) Methanol

D) Butanoic acid

15 / 100

Category: Chemistry

Which of the following is the percentage of the original quantity of a radioactive material left after five half-lives approximately.

NUMS Mock 4
Physics
Nuclear Physics

A) 3%

B) 6.25%

C) 10%

D) 20%

16 / 100

Category: Chemistry Ch 3 Class 12

Transition Elements usually show:

NUMS 2015
Chemistry
d and f Block Elements
Elimination Tool:

A) Para magnetism

B) Diamagnetism

C) Ferromagnetism

D) Both Ferromagnetism and Paramagnetism

17 / 100

Category: Chemistry Ch 10 Class 12

Which one the following can act as nucleophile?

Diethyl ether

Anilinium ion

Acylium ion

Dichloro methylene carbine

18 / 100

Category: Chemistry Ch 4 Class 11

Crystal structure of diamond is

Trigonal

Tetrahedral

Cubic

None of these

19 / 100

Category: Chemistry

Q.180 Enzymes speed up the reaction upto

A. 10^10

B. 200^10

C.10^20

D.150^10

20 / 100

Category: Chemistry Ch 5 Class 11

An element has configuration 2, 8, 1. It belongs to, ______.

NTS 2016 SMBBMC
Chemistry
Atomic Structure
Elimination Tool:

A) IA group and 3rd period

B) IIIA group and 1st period

C) IA group and 8th period

D) VIIA group and 3rd period

21 / 100

Category: Chemistry Ch 10 Class 12

Alkyl halides involving -C-X bond breakage and -C-Nu bond formation simultaneously would follow the mechanism:

PMC 2020
Chemistry
Alkyl Halides and Amines
Elimination Tool:

A) SN1

B) SN2

C) E1

D) E2

22 / 100

Category: Chemistry Ch 7 Class 11

For a chemical reaction A -> B, the threshold energy of the reaction is 37 kJ/mole. The average internal energy of A is 12 kJ/Mole. What will be the activation energy of A?

NTS 2016 SMBBMC
Chemistry
Thermochemistry
Elimination Tool:

A) 43 K.J/Mole

B) 37 K.J/Mole

C) 25 KJ/Mole

D) 19 K.J/Mole

23 / 100

Category: Chemistry Ch 4 Class 11

Water boils when:

Vapor pressure becomes equal to Atmospheric Pressure

Vapor pressure is less than Atmospheric Pressure

Vapor pressure is greater than Atmospheric Pressure

All of the above

24 / 100

Category: Chemistry Ch 9 Class 12

Name the main product formed as a result of the following reaction

H3C – (CH2)5 – CH3 ————> Product

n-heptane

Conditions: 480 – 550 C, 150 – 399 psi V2O5

NTS 2019
Chemistry
Hydrocarbons
Elimination Tool:

A) Benzene

B) Toluene

C) Xylene

D) Cyclohexane

25 / 100

Category: Chemistry Ch 5 Class 11

Bracket series of 14-atom is in which of the following regions of electromagnetic spectrum?

Far infrared

Near infrared

Infrared

Visible

26 / 100

Category: Chemistry

Q.73 Unit for rate constant is s–1 for a reaction. Its order is

0

1

2

3

27 / 100

Category: Chemistry Ch 8 Class 12

Electrophile in sulphonation of benzene is:

PMC 2020
Chemistry
Hydrocarbons
Elimination Tool:

A) HSO4-

B) H2SO4

C) SO3

D) HSO3

28 / 100

Category: Chemistry

Which one of the following is not an isotope of hydrogen:

NUMS Mock 2
Chemistry
Atomic Structure

A) Deuterium

B) Tritium

C) Ortho hydrogen

D) None of these

29 / 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

30 / 100

Category: Chemistry Ch 11 Class 11

Which of the following statements best describes how a catalyst works

NUMS 2018
Chemistry
Reaction Kinetics
Elimination Tool:

A) A catalyst changes the potential energies of the reactants and products

B) A catalyst decreases the temperature of the reaction which leads to a faster rate

C) A catalyst lowers the activation energy barrier for the reaction by providing a different reaction mechanism.

D) A catalyst raises the activation energy for the reaction which produces a faster rate

31 / 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

32 / 100

Category: Chemistry Ch 5 Class 11

Which orbitals always possess same energy:

Hybrid orbitals

Degenerate orbitals

None of these

Both a and b

33 / 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?

NTS 2015 SMBBMC
Chemistry
Hydrocarbons
Elimination Tool:

A) C2H6

B) C3H4

C) C3H6

D) C3H8

34 / 100

Category: Chemistry Ch 6 Class 11

Geometry of SF6 is:

Octahedral

Hexagonal

Decahedral

Trigonal

35 / 100

Category: Chemistry Ch 16 Class 12

The formula of “rock salt” is:

NTS 2012
Chemistry
Environmental Chemistry
Elimination Tool:

A) NaOH

B) NaHCO3

C) Na2CO3

E) NaCl

36 / 100

Category: Chemistry Ch 13 Class 12

Which of the following is used as coagulation for latex in rubber industry

Acetic acid

Amino acid

Ethyl alcohol

Rayon

37 / 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.

38 / 100

Category: Chemistry

Q.165 Carboxylic acids are formed by the hydrolysis of_

A. Ester Nitriles

B. Nitriles, amines

C. Alkenes, Alkynes

D. Esters, Alcohols

39 / 100

Category: Chemistry

Q.121 Ka (Cu(CN)4) which one is correct

A. Potassium tetra cyano recuperate

B. Coordination numbers 2

C The ligand is positively charged

D.Central atom is present in the avionic sphere

40 / 100

Category: Chemistry Ch 15 Class 12

Enzymes that are functioning within the cell are called:

NUMS 2016
Chemistry
Chemistry of Life
Elimination Tool:

A) Endoenzymes

B) Exoenzymes

C) Holoenzymes

D) Both A & C

41 / 100

Category: Chemistry Ch 2 Class 11

The rate of filtration can be considerably increased by using

Fluted filter paper

Suction flask

Stirrer

None of these

42 / 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

43 / 100

Category: Chemistry

Strongest acid among the following is:

NUMS Mock 4
Chemistry
Carboxylic Acids and its Derivatives

A) HCOOH

B) CH3COOH

C) (CH3)2CHCOOH

D) (CH3)3CCOOH

44 / 100

Category: Chemistry Ch 8 Class 12

In alkanes all carbon atoms are linked by bond

Triple

Single

Double bonds

Alternative

45 / 100

Category: Chemistry Ch 6 Class 12

Transition elements are colored in which type of compounds?

Ionic

Covalent

Both a and b

None of these

46 / 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

47 / 100

Category: Chemistry Ch 10 Class 12

Tertiary alkyl hallides follow which of the following mechanism when attacked by a Nucleophile?

SN1

SN2

Both

None

48 / 100

Category: Chemistry Ch 1 Class 12

Who started the development of the First Periodic Table?

) Antoine Bequerel

Dimitri Mendeleev

Robert Boyle

John Newlands

49 / 100

Category: Chemistry

Hydration energy of sodium Ion Is:

321 Kj/mol

406 Kj/mol

1032 kJ/mil

940 Kj/mol

50 / 100

Category: Chemistry

Which of the following atoms would be diamagnetic?

Ne

O

Al

K

51 / 100

Category: Chemistry Ch 7 Class 11

In an adiabatic process:

NUMS 2016
Chemistry
Thermochemistry
Elimination Tool:

A) Pressure is maintained constant

B) The gas is isothermally expanded

C) There is perfect heat insulation

D) System exchanges heat with the surroundings

52 / 100

Category: Chemistry Ch 13 Class 12

For preparation of carboxylic acid, alkyl nitrite is required. Alkyl nitrite can be prepared by treating KCN with:

Alkyl halide

Alcohol

Water

Acetaldehyde

53 / 100

Category: Chemistry Ch 11 Class 12

Propane-1 of when combines with FICI In the presence of ZnCl2, It gives:

1- Clifiropropane

2- Chloropropane

Dichloropropane

1-Cholropropene

54 / 100

Category: Chemistry Ch 11 Class 11

A catalyst:

NTS 2016 DUHS & JSMU
Chemistry
Reaction Kinetics
Elimination Tool:

A) Increases the rate of forward reaction

B) Increases the rate of both forward and reverse reaction

C) Changes equilibrium position

D) Increases the rate of reverse reaction

55 / 100

Category: Chemistry Ch 5 Class 12

Which of the following halogen does not form stable oxyacids?

CI

F

Br

I

56 / 100

Category: Chemistry Ch 15 Class 12

Which of the following is a Marco-nutrient

Boron

Copper

Iron

Nitrogen

57 / 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

58 / 100

Category: Chemistry Ch 4 Class 11

A liquid has mass m and specific heat capacity c. The rate of change in temperature of the liquid is R. What is the rate at which heat is transferred from the liquid.

PMC Practice 2
Physics
States of Matter – Gases, Liquids and Solids
Elimination Tool:

A) Rmc

B) R/me

C) me/R

D) Rm/c

59 / 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

60 / 100

Category: Chemistry Ch 10 Class 11

On balancing the following chemical equation: K2CrO4, + HCI –> KCI + 2CrCI3 + Cl2 + H2O The co-efficient with HCI will be?

12

14

13

16

61 / 100

Category: Chemistry Ch 6 Class 11

Surface tension in a liquid is caused by?

NTS 2015 DUHS and JSMU
Chemistry
Chemical Bonding
Elimination Tool:

A) Lack of horizontal intermolecular forces

B) greater rate of evaporation at the surface than from the interior

C) reduced rate of intermolecular collisions at the surface

D) greater fluidity

62 / 100

Category: Chemistry Ch 9 Class 11

Which of the following Is the smallest unit?

Molarity

Molality

PPM

Mole Fraction

63 / 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

64 / 100

Category: Chemistry Ch 3 Class 12

Solubility of Borax decahydrate at 100C is

63 grams

113 grams

99.3 grams

58.5 grams

65 / 100

Category: Chemistry Ch 12 Class 12

Why is it necessary to distill aldehyde formed from oxidation of primary alcohol through acidified potassium dichromate (VI) solution or acidified sodium dichromate (VI) solution?

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

A) Aldehyde formed may be oxidized further to carboxylic acid concerned

B) Aldehyde formed is unstable and decompose back to original precursor i.e. primary alcohol

C) Aldehyde may be oxidised further to a ketone

D) Aldehyde formed may react with primary alcohol, the original reactant.

66 / 100

Category: Chemistry

Q.90 Which of the following propefties belong to acetic acid?

A. Colourless liquid, odourless, sour taste

B. Bright colour bituer taste

C.Colourless solid, sour taste, pungent smell

D. All are incórreet

67 / 100

Category: Chemistry Ch 11 Class 12

Phenol is reduced to benzene on reaction with:

Zn

NaOH

KMnO4

HO

68 / 100

Category: Chemistry

Q.172 Dipole forces has direct relation with the

A. Chemical properties of a substance

B. Kinetic properties of substance

C. Thermodynamic properties of substance

D. Nature of substance

69 / 100

Category: Chemistry Ch 10 Class 11

Oxidation number of Cr in K2Cr2O2 & K2Cr2O4 is:

+6, +3

+5, +2

7 +3

6 +4

70 / 100

Category: Chemistry Ch 7 Class 12

The isomers must have the same:

NTS 2013
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) Physical properties

B) Molecular Formula

C) Structural Formula

D) Chemical properties

71 / 100

Category: Chemistry Ch 15 Class 12

The temperature zones In rotary kilns are:

5

4

6

None of these

72 / 100

Category: Chemistry

Q.40 Octane number of n-heptane is____________?

A. 0

B. 100

C.40

D. 98

73 / 100

Category: Chemistry Ch 11 Class 12

Which of the following compounds are added to ethanol to make it unfit for drinking?

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

A) Pyridine

B) Methanol

C) Acetone

D) All of these options are correct

74 / 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％

75 / 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

76 / 100

Category: Chemistry Ch 4 Class 11

Which type of movement is shown by the atoms of the solid?

PMC Practice 6
Chemistry
States of Matter – Gases, Liquids and Solids
Elimination Tool:

A) Translational motion

B) Vibrational motion

C) Rotational motion

D) Linear motion

77 / 100

Category: Chemistry Ch 4 Class 11

Which of the following is the correct equation to calculate relative molecular mass of a gas.

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

A) M = mPR / VT

B) M = PV / mRT

C) M = mPRT / V

D) M = mRT / PV

78 / 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

79 / 100

Category: Chemistry Ch 8 Class 11

The value K for H2(g) + CO2(g) H2O(g) + CO(g) is 1.80 at 1000 C. If 1.0 mole of each H2 and CO2 are placed in 1 litre flask, the final equilibrium concentration of CO at 1000 C will be:

NTS 2017
Chemistry
Chemical Equilibrium
Elimination Tool:

A) 0.295 M

B) 0.385 M

C) 0.531 M

D) 0.473 M

80 / 100

Category: Chemistry Ch 11 Class 11

The rate of a gaseous reaction Is given by K [A] [B]. If the volume of the vessel containing these gases is reduced to 1/4th of the initial volume, the rate of reaction relative to the original rate would be:

NUMS 2016
Chemistry
Reaction Kinetics
Elimination Tool:

A) 16/1

B) 1/16

C) 4/1

D) 1/8

81 / 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

82 / 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

83 / 100

Category: Chemistry Ch 10 Class 12

Order of the reactivity of halogens during halogenation of alkanes is:

NUMS 2019 Reconduct
Chemistry
Alkyl Halides and Amines
Elimination Tool:

A) Cl2 > I2 > Br2

B) Br2 > I2 > Cl2

C) I2 > Cl2 > Br2

D) Cl2 > Br2 > I2

84 / 100

Category: Chemistry Ch 13 Class 12

What happens if we react a carboxylic acid with an acyl chloride?

NUMS 2019 Cancelled
Chemistry
Carboxylic Acids and its Derivatives
Elimination Tool:

A) It forms an acid anhydride

B) It forms an acyl halide

C) It does not react due to resonance

D) It does not react due to bad leaving group

85 / 100

Category: Chemistry Ch 6 Class 11

Which of the following has greatest electronegativity?

Cl2

Br2

I2

Cs

86 / 100

Category: Chemistry Ch 11 Class 12

Primary Alcohol is produced by reactions of Grignard’s reagent with _________ followed by hydrolysis in an acidic medium.

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

A) Carbon dioxide

B) Formaldehyde

C) Acetaldehyde

D) Ketone

87 / 100

Category: Chemistry Ch 5 Class 11

Shape of the orbital occupied by an electron is defined by:

NTS 2016 DUHS & JSMU
Chemistry
Atomic Structure
Elimination Tool:

A) Principal quantum number

B) Azimuthal quantum number

C) Spin quantum number

D) Magnetic quantum number

88 / 100

Category: Chemistry

Q.86 Al powder heated in steam produces Al2O3 and

A. N2

B. H2

C. O2

D. Cl2

89 / 100

Category: Chemistry Ch 3 Class 11

A child’s balloon has a volume 3.80 dm3, when the temperature is 35°C. If the balloon is put in a refrigerator and cooled to 5°c, the approximate volume of the balloon is (assume pressure inside the balloon is equal to atmospheric pressure):

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

A) 3.00 dm3

B) 3.43dm3

C) 3.08 dm3

D) 3.25 dm3

90 / 100

Category: Chemistry Ch 8 Class 12

In Alkenes the Carbon atoms are connected to each other by a

Single bond

Double bond

Triple bond

Not connected

91 / 100

Category: Chemistry Ch 12 Class 12

In the addition of sodium bisulfite to carbonyl system, which of the following is a nucleophile?

PreMedPK MDCAT Mock 3
Chemistry
Aldehydes and Ketones
Elimination Tool:

A) Sulphide ion

B) Sulfite ion

C) Hydride ion

D) Sodium ion

92 / 100

Category: Chemistry Ch 5 Class 12

Fluorine Is reactive due to its:

Low Ionization potential

Low dissociation energy

Low electro negativity

Large size

93 / 100

Category: Chemistry Ch 2 Class 12

The carbonates of alkali metals are soluble in water except:

NUMS 2020
Chemistry
s and p Block Elements
Elimination Tool:

A) K2CO3

B) Li2CO3

C) Na2CO3

D) Rb2CO3

94 / 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

95 / 100

Category: Chemistry Ch 15 Class 12

Which in not woody raw material

Poplar

) Hard wood

Fir

Rag

96 / 100

Category: Chemistry Ch 10 Class 12

Which one of the following is NOT a nucleophile?

NTS 2019
Chemistry
Alkyl Halides and Amines
Elimination Tool:

A) H2S

B) BF3

C) NH3

D) CN-

97 / 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

98 / 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

99 / 100

Category: Chemistry

The decreasing order of second ionization energy of K, Ca, Ba is:

NUMS Mock 1
Chemistry
Chemical Bonding

A) K > Ca > Ba

B) Ca > Ba > K

C) Ba > K > Ca

D) K > Ba > Ca

100 / 100

Category: Chemistry Ch 9 Class 12

Name the main product formed as a result of the following reaction

H3C – (CH2)5 – CH3 ————> Product

n-heptane

Conditions: 480 – 550 C, 150 – 399 psi V2O5

NTS 2019
Chemistry
Hydrocarbons
Elimination Tool:

A) Benzene

B) Toluene

C) Xylene

D) Cyclohexane

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