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

Question # 1

A hydrocarbon has molecular formula C₈H₁₄. What is the molecular formula of the next number of the same homologous series.

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C₉H₁₈

C₉H₁₆

C₉H₂₀

C₉H₁₂

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Question # 2

Which is simplest alkane?

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CH₄

C₂H₈

C₂H₂

C₂H₄

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Question # 3

The reduction of alkyl halides takes place in the presence of

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Zn/HCl

Na/HCl

Mg/HCl

Cu/HCl

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Question # 4

Hydrogenation of alkenes and alkynes takes place at room temperature in the presence of.

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Both a and b

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Question # 5

Dichloromethane reacts with halogens in the presence of diffused sun light and produces

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Carbon tetrachloride

Chloroform

Chloromethane

No reaction

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Question # 6

Which hydrocarbon has no effect on an aqueous solution of bromine.

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CH₄

C₁₀H₂₀

C₂H₂

C₂H₄

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Question # 7

Ethylene is present is natural gas sometimes to the extent of .

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10%

20%

30%

40%

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Question # 8

Chemical formula of chloroform is :

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CH₂Cl₂

CH₃Cl

CHCl₃

CCl₄

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Question # 9

Which of following dehydration of alcohols take place:

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NaOH

KOH

H₂SO₄

HCl

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Question # 10

One of the hydrocarbons reacts with one mole of hydrogen to form a saturated hydrocarbon. What formula could be of the X.

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C₃H₈

C₆H₁₂

C₄H₁₀

C₇H₁₆

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Question # 11

General formula of alkynes is:

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C_nH_n

C_nH_2n

C_nH_2n+2

C_nH_2n-2

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Question # 12

Dehydrohalogenation take place in the presence of.

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Aqueous NaOH

Alcoholic KOH

Aqueous KOH

Alcoholic NaOH

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Question # 13

Chloroform is used for

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Anesthesia

Fever

Link

Toys

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