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10th Class Chemistry Chapter 12 Hydrocarbons English Medium KPK Boards Online Mcqs MCQs With Answers

Question # 1

Which one is the formula of chloromethane.

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CH₂Cl₂

CCl₄

CHCl₃

CH₃Cl

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Question # 2

The order of reactivity of hydrogen halides with alkenes is.

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HI>HBr

HBr>HI

HCl>HBr

HBr < HCl

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Question # 3

Which is the substitution reaction in the following?

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Halogenation of alkenes

Halogenation of alkynes

Bromination of alkene

Halogenation of alkanes

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Question # 4

The end product of oxidation of acetylene is .

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Oxalic acid

Glyoxal

Glycol

None of these

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Question # 5

Dehydrohalogenation takes place in the presence of .

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NaOH aqueous

Alcoholic KOH

Aqeous KOH

Alcoholic NaOH

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Question # 6

Which of one of the following is used as as fumigant:

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Ethyl alcohol

ethylene oxide

ethylene glycol

diethyl ether

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Question # 7

The order of reactivity of hydrogen halides with alkenes is:

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HI>HBR

HBr>HI

HCl>HBr

HBr>HCl

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Question # 8

Carbon black is used in the manufacture of.

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Dry cleaning

Shoe polishes.

Fertilizer

None of these

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Question # 9

Halogenation of alkanes in the presence of diffused sunlight takes place.

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Suddenly, only in one step

Slowly in one step

In a series of step

Fastly in two steps

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Question # 10

Carbon Tetra chloride is used in .

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Fertilizer

Dry cleaning

Metallurgy

Anesthesia

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Question # 11

Dehalogenation of Tetrahalides takes place in the presence of .

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Zn dust

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Question # 12

Hydrogenation of alkenes and alkynes may be carried out at room temperature in the presence of catalyst:

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Pt or Pd

Fe2O3

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Question # 13

Which one of the following is gas at room temperature:

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C2H6

C6H14

C6H6

C8H18

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