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Chemistry 9th Class English Medium Unit 11 Online Test MCQs With Answers

Question # 1

Which other metal can be used to reduce alkyl halides.

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Question # 2

The branch of chemistry which deals with the study of hydrocarbons and their drivatives is known as

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Inorganic chemistry

Nuclear chemsistry

Organic chemistry

Biochemistry

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Question # 3

The valancey of carbon is

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Question # 4

No of moles of oxygen required to completely burn ethane is

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Question # 5

Which one of the forllowing is a substitution reaction.

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Halogenation of alkanes

Halogenation of alkenes

Bromination of alkenes

Halogenation fo alkynes

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Question # 6

If naphtha undergoesa combustion reactin what products do yu expect to form

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Alkanes

Alkenes

CO2 and H2O

Both alkanes and alkenes

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Question # 7

Alkanes do not react in

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Diffused sunlight

Dark

Bright sunlight

None of these

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Question # 8

Halogenation of methane produces followign valuable chemical compounds used as solvent except.

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Chloromethane

Carbon tetrachloride

Chloroform

Carbon black

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Question # 9

The most essential element for organic compound is.

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Nitrogen

Oxygen

Hydrogen

Carbon

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Question # 10

Higher molecular mass hydrocarbons are broken up into smaller in a process called.

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Refining

Distillation

Cracking

Condensation

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Question # 11

Hydrogenatio of alkenes and alkynes takes place at room temperatur ein the presence of.

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Both a and b

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Question # 12

Simplest family of organic compunds is

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Carbohydrates

Proteins

Hydrocarbons

Oils

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