Chemistry Practice Tests 2

Created by Ali Durrani

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Chemistry Practice Test 2

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1 / 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

2 / 100

Category: Chemistry Ch 2 Class 12

Rocky crust of earth is mainly composed of?

Oxygen and Silicon

Oxygen and Hydrogen

b) Oxygen and Carbon

Carbon and Hydrogen

3 / 100

Category: Chemistry Ch 8 Class 12

Molecular Formula of Propane is:

C3H8

C4H10

C6H12

C7H14

4 / 100

Category: Chemistry Ch 7 Class 12

IUPAC name of this is (CH3)2 – CH – CH (C2H5) – C(CH3)3

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

A) 3-ethyl-2, 2, 4-trimethyl pentane

B) 4-ethyl-2, 2, 4-trimethyl pentane

C) 5-ethyl-2, 2, 4-trimethyl pentane

D) 2-ethyl-2, 2, 4-trimethyl pentane

5 / 100

Category: Chemistry Ch 5 Class 12

Bleaching powder is agent?

Oxidizing

Reducing

Both a and b

None of these

6 / 100

Category: Chemistry Ch 5 Class 11

In a discharge tube, at room pressure there is

Maximum discharg

Minimum discharge

No discharge

Moderate dischil

7 / 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

8 / 100

Category: Chemistry Ch 10 Class 11

The oxidation number of nitrogen in the HNO3 is _______.

NUMS 2018
Chemistry
Electrochemistry
Elimination Tool:

A) 4+

B) 5+

C) 6+

D) 7+

9 / 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

10 / 100

Category: Chemistry Ch 1 Class 11

Which of the following represents Empirical Formula of Glucose?

CH2O

CHO

C2H0

CHO2

11 / 100

Category: Chemistry Ch 6 Class 11

Bond energy between nitrogen atoms in N2 molecule is:

NTS 2015 DUHS and JSMU
Chemistry
Chemical Bonding
Elimination Tool:

B) 820 kJ mol-1

C) 498 kJ mol-1

D) 347 kJ mol-1

E) 946 kJ mol-1

12 / 100

Category: Chemistry Ch 1 Class 11

Glucose(C6H12O6) is the most important nutrient in a cell for generating chemical potential energy, what is the mass percent of carbon in 1.5g of sample?

PMC Practice 24
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) 33%

B) 40%

C) 53.3%

D) 6.67%

13 / 100

Category: Chemistry Ch 1 Class 12

The formula of washing soda is:

NUMS 2015
Chemistry
Periodicity in Elements
Elimination Tool:

A) N2CO3

B) Na2CO3 . H2O

C) Na2CO3 . 7H2O

D) Na2CO3 . 10 H2O

14 / 100

Category: Chemistry Ch 13 Class 12

Which of the following is the strongest acid?

PMC 2020
Chemistry
Carboxylic Acids and its Derivatives
Elimination Tool:

A) Propanoic acid

B) Fluoroethanoic acid

C) Trichloroethanoic acid

D) Nitroethanoic acid

15 / 100

Category: Chemistry Ch 16 Class 12

NO2 in atmosphere absorbs moisture to form?

HNO3

HNO2

NO

Both a and b

16 / 100

Category: Chemistry

When two moles of H2 and one mole of O2 react to form H2O, 484 KJ heat is evolved. What is Δ Hf for one mole of H2O?

NUMS Mock 3
Chemistry
Thermochemistry

A) -484 KJmol-1

B) -242 KJmol-1

C) -121 KJmol-1

D) +242 KJmol-1

17 / 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

18 / 100

Category: Chemistry Ch 5 Class 12

What is the chief ore of fluorine?

Cryolite

Fluorspar

Dolomite

Both a and b

19 / 100

Category: Chemistry Ch 11 Class 12

IUPAC name of wood spirit is

Ethanol

Methanol

Propanol

None of these

20 / 100

Category: Chemistry Ch 8 Class 11

Which of the following has the highest value of pKa?

NUMS 2019 Reconduct
Chemistry
Chemical Equilibrium
Elimination Tool:

A) CH3- CH2OH

B) CI – CH2- CH2OH

C) F3C – CH2- OH

D) CH3- CH(CH3) – CH2OH

21 / 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

22 / 100

Category: Chemistry Ch 15 Class 12

[Ti(H2O)6]3+ transmits

UHS 2015
Chemistry
Environmental Chemistry
Elimination Tool:

A) Yellow and Red light

B) Yellow and Blue light

C) Red and white light

D) Red and blue light

23 / 100

Category: Chemistry Ch 9 Class 12

The C-H bond distance is the longest in:

NUMS 2015
Chemistry
Hydrocarbons
Elimination Tool:

A) C2H4

B) C2H2

C) C2H6

D) C2H2Br

24 / 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

25 / 100

Category: Chemistry Ch 3 Class 12

Which one of the following ions exhibits d-d transition and paramagnetism as well?

NTS 2014
Chemistry
d and f Block Elements
Elimination Tool:

A) MnO4-

B) CrO42-

C) MnO42-

D) Cr2O72-

26 / 100

Category: Chemistry Ch 10 Class 12

All amino acids contain the functional group:

NTS 2017
Chemistry
Alkyl Halides and Amines
Elimination Tool:

A) NH2

B) CO2

C) S2-

D) Both A and B

27 / 100

Category: Chemistry Ch 1 Class 11

To find the number of molecules in a given compound which of the following is employed?

Chromatography

Le-Chatelier's principle

Kc

None of thes

28 / 100

Category: Chemistry Ch 15 Class 12

The substance for the separation of isotopes is firstly converted into the

UHS 2016
Chemistry
Environmental Chemistry
Elimination Tool:

A) Neutral state

B) Free state

C) Vapour state

D) Charged state

29 / 100

Category: Chemistry Ch 14 Class 12

Which of following Is poison for catalyst:

Sulphur

Arsenic

Al203

Both a and b

30 / 100

Category: Chemistry Ch 3 Class 11

Diamond and Graphite:

NTS 2013
Chemistry
States of Matter – Gases, Liquids and Solids
Elimination Tool:

A) are isotopes

B) are isomers

C) are allotropes

D) have the same structure

31 / 100

Category: Chemistry Ch 2 Class 12

Li is an element of group?

II-A

Ill-A

I-A

IV-B

32 / 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

33 / 100

Category: Chemistry Ch 5 Class 11

Which of the following quantum numbers are for p-subshell?

a

b

c

d

34 / 100

Category: Chemistry Ch 15 Class 12

The temperature zones In rotary kilns are:

5

4

6

None of these

35 / 100

Category: Chemistry

Q.114 On which of the following factors Hydration Energy depend?

A Charge to size ratio

B. Polarizability of anions

C. Polarization power of Cations

D. All of these

36 / 100

Category: Chemistry Ch 8 Class 12

In the reaction, R-C≡C-R → the reagent used to convert alkyne into trans alkene is:

NTS 2014
Chemistry
Hydrocarbons
Elimination Tool:

A) Ni

B) Lindlar catalyst

C) B2H6/CH3COOH

D) Li/NH3

37 / 100

Category: Chemistry Ch 4 Class 11

All the collisions between the particles of gases are elastic in nature. What is meant by “Elastic Collisions”?

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

A) No change in the total kinetic energy

B) The velocity of the molecules changes

C) No change in potential energy during the collisions

D) No change in mass during the collisions

38 / 100

Category: Chemistry Ch 6 Class 11

Which of the following is paramagnetic

Nickle

Vanadium

Uranium

Oxygen

39 / 100

Category: Chemistry Ch 8 Class 12

Which one of these is/are gasses?

Methane

Ethane

Propane

All of these

40 / 100

Category: Chemistry Ch 7 Class 11

Born Haber cycle is used to determine:

PMC 2020
Chemistry
Thermochemistry
Elimination Tool:

A) Electron affinity

B) Lattice energy

C) Crystal energy

D) All of the above

41 / 100

Category: Chemistry Ch 14 Class 12

Chlorine is manufactured commercially by the electrolysis of aqueous sodium chloride (brine). Which other products are made in this process?

NTS 2010
Chemistry
Macromolecules
Elimination Tool:

A) Hydrochloric acid and hydrogen

B) Hydrogen and sodium

C) Hydrogen and sodium hydroxide

D) Sodium and sodium hydroxide

42 / 100

Category: Chemistry Ch 4 Class 12

The ligand field effect splits five degenerate d-orbitals into two sets with different energies, the pair of high energy degenerate orbitals is:

NTS 2019
Chemistry
d and f Block Elements
Elimination Tool:

A) dxy, dyz

B) dyz, dzx

C) dx2 ,d

D) dx2 – y2, dy2

43 / 100

Category: Chemistry Ch 5 Class 11

The quantum numbers +½ and -½ for the electron spin represent:

NTS 2017
Chemistry
Atomic Structure
Elimination Tool:

A) Rotation of the electron in clockwise and anticlockwise direction respectively

B) Rotation of the electron in anticlockwise and clockwise direction respectively

C) Magnetic movement of the electron pointing up and down respectively

D) Two quantum mechanical spin states which have no classical analogue

44 / 100

Category: Chemistry Ch 14 Class 12

Which of the following is a monosaccharide ?

Maltose

Sucrose

lactose

Fructose

45 / 100

Category: Chemistry Ch 7 Class 12

Isomerism is:

Same molecular formula but different structure

Same molecular formula and same structure

Different molecular formula but same structure

None of these

46 / 100

Category: Chemistry Ch 11 Class 12

Melting point of methyl alcohol is?

-97.6 'C

-37.6 'C

-64.7'C

-94.6'C

47 / 100

Category: Chemistry

What is the measure of activation energy in an endothermic reaction?

NUMS Mock 2
Chemistry
Thermochemistry

A) The energy of activation of backward reaction is less than that of forward reaction

B) The energy of activation of backward reaction is more that that of forward reaction.

C) The energy of activation of forward reaction is less than that of backward reaction.

D) The energy of activation of forward – backward reaction is same.

48 / 100

Category: Chemistry Ch 5 Class 11

Which of the following has lowest e/m ratio?

PMC 2020
Chemistry
Atomic Structure
Elimination Tool:

A) Li+2

B) H+

C) He+

D) Be

49 / 100

Category: Chemistry Ch 6 Class 12

ransition elements are colored because of:

d-d transition

d-p transition

p-p transition

s-d transition

50 / 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

51 / 100

Category: Chemistry Ch 7 Class 11

If a system absorbs heat, the surrounding temperature

Increases

Remains same

Decreases

Decreases then suddenly Increases

52 / 100

Category: Chemistry Ch 10 Class 12

Which type of alkyl halides gives SN2 mechanism?

NUMS 2019 Reconduct
Chemistry
Alkyl Halides and Amines
Elimination Tool:

A) Secondary alkyl halides

B) Tertiary alkyl halides

C) Vinyl halides

D) Primary alkyl halides

53 / 100

Category: Chemistry Ch 13 Class 12

Carboxylic acids are formed by the hydrolysis of ________.

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

A) Ester & Nitriles

B) Nitriles & Amines

C) Alkenes & Alkynes

D) Esters & Alcohols

54 / 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

55 / 100

Category: Chemistry Ch 5 Class 12

Noble gasses have?

High ionization energ

Zero ionization Energy

Low ionization energy d)

None of these

56 / 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

57 / 100

Category: Chemistry Ch 15 Class 12

How many grams of micronutrients are needed by 1 acre of land?

100-1000

200-500

6 to 200

20 to 300

58 / 100

Category: Chemistry Ch 4 Class 11

The unit cell parameters of the monoclinic system are:

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

A) a = b ≠ c ; α=β=γ=90

B) a ≠ b ≠ c ;α=γ=90 ; β≠90

C) a ≠ b = c ;α=β=90; γ≠90

D) a = b = c ;α=β=γ=90

59 / 100

Category: Chemistry Ch 3 Class 11

Statement of Charles Law:

V is directly proportional to P

V is directly proportional to T

) P is inversely proportional to V

d) All of these

60 / 100

Category: Chemistry Ch 9 Class 12

The ratio of σ to π bonds in benzene is:

NUMS 2019 Reconduct
Chemistry
Hydrocarbons
Elimination Tool:

A) 4:1

B) 1:4

C) 1:3

D) 3:1

61 / 100

Category: Chemistry Ch 9 Class 11

Aqueous solutions of Iodine and Sodium hydroxide were mixed in a round bottom flask at 70 C. Following chemical reaction was carried out.

3I2 + 6 NaOH -> NaIO3 + NaI + H2O
This reaction is termed as;

UHS 2019
Chemistry
Solution and Colloids
Elimination Tool:

A) Redox reaction

B) Precipitation reaction

C) Substitution reaction

D) Free radical reaction

62 / 100

Category: Chemistry Ch 4 Class 12

D block elements are also called as ____ ?

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

A) Rare earth elements

B) Outer transition elements

C) Inner transition elements

D) Typical transition elements

63 / 100

Category: Chemistry Ch 10 Class 12

Which gases are produced when alcohol reacts with thionyl chloride?

PMC Sample 1
Chemistry
Alkyl Halides and Amines
Elimination Tool:

A) Sulphuric acid and carbon dioxide

B) Sulphur dioxide and hydrogen chloride

C) Sulphur chloride and hydrogen dioxide

D) Sulphuric acid and hydrogen chloride

64 / 100

Category: Chemistry

Identify the correct statement:

NUMS Mock 3
Chemistry
s and p Block Elements

A) Element sodium can be prepared and isolated by electrolyzing an aqueous solution of NaCl

B) Elemental Na is a strong oxidizing agent

C) Elemental Na is insoluble in NH3

D) Elemental Na is easily oxidizing

65 / 100

Category: Chemistry Ch 5 Class 12

Which of the following is bleaching powder’s formula?

Ca(CI0)4

Ca2(CI0)2

Ca (CI0)2

Ca (CI20)2

66 / 100

Category: Chemistry Ch 8 Class 12

The electrophilic reactions of Benzene are:

NTS 2011
Chemistry
Hydrocarbons
Elimination Tool:

A) Halogenation

B) Nitration

C) Sulphonation

D) Alkylation and Acylation

E) All of these

67 / 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%

68 / 100

Category: Chemistry Ch 1 Class 12

Smallest element in the periodic table is?

Hydrogen

Fluorine

Lithium

Uranium

69 / 100

Category: Chemistry Ch 10 Class 11

In which of the following nitrogen compounds, does N has the highest oxidation state?

NTS 2018
Chemistry
Electrochemistry
Elimination Tool:

A) NH2OH

B) N2H4

C) HNO3

D) NH3

70 / 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

71 / 100

Category: Chemistry Ch 1 Class 11

Solution contains 85.5 g of sucrose (C12H22O11) in 250 cm3. What is its molarity?

UHS 2019
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) 1 M

B) 0.5 M

C) 0.25 M

D) 2 M

72 / 100

Category: Chemistry Ch 11 Class 12

The alkenes can be formed by alcohols in the presence of

PMC Sample 3
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) acidified KMnO4

B) acidified K2Cr2O7

C) acidified Cucl2

D) pyridine

73 / 100

Category: Chemistry Ch 8 Class 12

How many sigma groups are there in benzene?

NTS 2014
Chemistry
Hydrocarbons
Elimination Tool:

A) 3

B) 6

C) 9

D) 12

74 / 100

Category: Chemistry Ch 6 Class 12

Higher Transition elements are:

d-type

f-type

Both a and b

None of these

75 / 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

76 / 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

77 / 100

Category: Chemistry Ch 10 Class 12

Which one the following can act as nucleophile?

Diethyl ether

Anilinium ion

Acylium ion

Dichloro methylene carbine

78 / 100

Category: Chemistry Ch 8 Class 11

A chemical engineer wants to use the Haber process in order to produce ammonia as raw material for fertilizers. Which of the following parameters must the chemical engineer AVOID in order to obtain the maximum yield of ammonia?
N2(g) + 3H2(g) -> 2NH3(g) ΔH0 = -92.6 kJ/mol

NUMS 2019 Cancelled
Chemistry
Chemical Equilibrium
Elimination Tool:

A) Increase the temperature

B) Use a catalyst

C) Adding more nitrogen gas

D) Increase the pressure

79 / 100

Category: Chemistry Ch 1 Class 11

The number of neutrons in H2SO4 are ____.

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

A) 5

B) 49

C) 48

D) 44

80 / 100

Category: Chemistry Ch 11 Class 12

The compound ‘leaf alcohol’ is partly responsible for the smell of new – mown grass

CH3CH2CH=CHCH2CH2OH

Leaf alcohol

Which two compounds will be formed when ‘leaf alcohol’ is oxidized using hot, concentrated manganate (VII) ions?

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

A) CH3CO2H and HOCH2CH2CH2CO2H

B) CH3CO2H and HO2CCH2CH2CO2H

C) CH3CH2CO2H and HO2CCH2CO2H

D) CH3CH2CO2H and HOCH2CH2CO2H

81 / 100

Category: Chemistry

Q.3 The equilibrium Constant is always written as a ratio of

A. Reactants over products

B. Products over reactants

C. Product times Reactants

D. None of these

82 / 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

83 / 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

84 / 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

85 / 100

Category: Chemistry Ch 1 Class 12

Hydrogen resembles the elements of groups:

NTS 2019
Chemistry
Periodicity in Elements
Elimination Tool:

A) I-A, V-A and VIll-A

B) I-A, IV A and Vl-A

C) I-A, II-A and VIl-A

D) I-A, IV-A and VIl-A

86 / 100

Category: Chemistry Ch 10 Class 11

The hydrogen gas bubbling into one molar solution of HCl has a pressure of

PMC Sample 3
Chemistry
Electrochemistry
Elimination Tool:

A) 2atm

B) 780 mmHg

C) 19 Psi

D) 1 atm

87 / 100

Category: Chemistry Ch 14 Class 12

A polymer called Bakelite is formed by the reaction of phenol with:

PMC Practice 2
Chemistry
Macromolecules
Elimination Tool:

A) Hydrogen

B) Ethers

C) Carboxylic acid

D) Formaldehyde

88 / 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

89 / 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

90 / 100

Category: Chemistry Ch 11 Class 11

The effect of temperature on the rate of a reaction is given by:

NUMS 2020
Chemistry
Reaction Kinetics
Elimination Tool:

A) Henderson’s equation

B) General gas equation

C) Arrhenius equation

D) Van der Waals equation

91 / 100

Category: Chemistry Ch 8 Class 12

KOLBE’s method is used to prepare?

Ethane

Ethene

Ethyne

All of these

92 / 100

Category: Chemistry

Q.121 The lost in globular structure of enzyme is called ___________ of enzyme

A. Activation

B. Concentration

C. Saturation

D. Denaturation

93 / 100

Category: Chemistry Ch 2 Class 11

Which of the following is the chemical formula of a compound indicating the relative number of atoms in the simplest ratio?

NTS 2016 SMBBMC
Chemistry
Stoichiometry
Elimination Tool:

A) Empirical formula

B) Empirical formula mass

C) Molecular formula

D) Molecular mass

94 / 100

Category: Chemistry Ch 11 Class 11

If energy of the activated complex is close to energy of reactants, it means that the reaction is:

NUMS 2019 Reconduct
Chemistry
Reaction Kinetics
Elimination Tool:

A) Fast

B) Moderate

C) Slow

D) Very slow

95 / 100

Category: Chemistry

Q.70 Which one of the following is an electrophile?

A. Br

B.CH4

C. NH3

D. H2O

96 / 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

97 / 100

Category: Chemistry

Q.89 Iftwo substituents are present at 1,4 positions then the isomer is called As____________?

A. Ortho

B. Meta

C.Para

D.None of these

98 / 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

99 / 100

Category: Chemistry Ch 11 Class 12

Alkoxicies react with alkyl halide to form? a

Ether

Ester

Carboxylic acid

alcohol

100 / 100

Category: Chemistry Ch 14 Class 12

Industrially water gas is converted into methanol by using catalyst:

NUMS 2019 Reconduct
Chemistry
Macromolecules
Elimination Tool:

A) CuO + ZnO

B) CuO + Cr2O3

C) Al2O3+ ZnO

D) ZnO + Cr2O3

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