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Chemistry 10th Class English Medium Unit 12 Online Test MCQs With Answers

Question # 1

Dehydrohalogenation takes place in the presence of .

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NaOH aqueous

Alcoholic KOH

Aqeous KOH

Alcoholic NaOH

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Question # 2

Chemical formula of chloroform is :

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CH₂Cl₂

CH₃Cl

CHCl₃

CCl₄

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Question # 3

Halogenation of methane produces following valuable chemical compounds used as solvents except.

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Carbonterachloride

Chloroform

Carbon Black

Chloromethane

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Question # 4

Olefins is a Latin word meaning:

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inert

less reactive

oil forming

most reactive

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Question # 5

Which gas in produced during ripening of bnabanas.

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Methane

Ethene

Acetylene

Carbon dioxide

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Question # 6

Which one of the following is polmerized to from benzene?

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ethane

ethene

methane

ethyne

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Question # 7

Which one of these hydrocarbon molecules would have no effect on an aqueous solution of bromine?

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CH₄

C₁₀H₂₀

C₂H₄

C₂H₂

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Question # 8

Incomplete combustion of alkanes produce.

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Carbon dixoide only

Carbon monoxide only

Carbon monoxide carbon black and water

Carbon dioxide and carbon black

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Question # 9

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 # 10

The process which convert vegetable oil into banaspati ghee called.

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Hydrogenation

Halogenation

a and b

None of these

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Question # 11

Dehydrohalogenation take place in the presence of.

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Aqueous NaOH

Alcoholic KOH

Aqueous KOH

Alcoholic NaOH

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Question # 12

Hydrogenation of vegetable oil to convert it into banaspatic ghee is carried out in the presence of catalyst:

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Ni-metal

Zn-metal

Na - Metal

Fe2O3

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Question # 13

Which gas creates suffocation and causes death?

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CO₂

SO₃

SO₂

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