Question # 1

Carbon black is used in the manufacture of.

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Dry cleaning

Shoe polishes.

Fertilizer

None of these

Which one is the formula of chloromethane.

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CH₂Cl₂

CCl₄

CHCl₃

CH₃Cl

Substitution reaction is the characteristics of.

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Alkanes

Alkenes

Alkynes

None of these

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

In shoe polished, which chemical is used.

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Ethanol

Methanol

Carbon black

Formaldehyde

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

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Ethyl alcohol

ethylene oxide

ethylene glycol

diethyl ether

Traces of acetylene are present to coal gas about.

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0.06 %

0.08%

1.1 %

90%

Which one of the following is polmerized to from benzene?

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ethane

ethene

methane

ethyne

The alkanes consisting of C₅ to C₁₀

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gases

liquids

solid

plasma

Which is present 85% in natural gas?

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Ethane

Propane

Methane

Butane

The order of reactivity of hydrogen halides with alkenes is.

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HI>HBr

HBr>HI

HCl>HBr

HBr < HCl

General formula of alkenes.

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C_n H_2n-2

C_nH_2n

C_nH_2n+2

C_nH_2n-1

Halogenation of methane on the presence of diffused sunlight takes place.

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Only in one step

Slowly in one step

Freshly in two steps

In a series of four steps

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

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