Question # 1

What is the percentage of carbon in anthracite?

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60%

70%

80%

90%

Coal is blackish complex mixture of compounds of

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Carbon

Hydrogen

oxygen

All

The strong heating of coal in the absence of air called.

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Fractional Distilation

Destructive Distiation

Carbonization

Catenation

The ability of carbon atoms to form chains or ring called.

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Hydrogenation

Chlorination

Cantenation

Halogenation

Percentage of methane present in natural gas is.

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75%

80%

85%

90%

General formula of Alkyl radical is..

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C₆H_2n-2

C_nH_2n+2

C₁₁H_2n-1

C_nH_2n-2

Main component of Natrual gas.

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CH₃

CH₄

C₂H₆

C₂H₂

Silicon occurs in the form of

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Silica

Silicates

both a and b

None of these

Coal tar contains compounds

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Benzene

Phenol

Toluene

All

Which one contains double covalent bound?

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Pentane

Ethylene

Acetylene

All

Which one of the following is not a fossil fuel?

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Coal

Natural gas

Bio gas

Petroleum

Pitch is black residue of

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Coke

Coal-tar

Coal

Coal gas

Number of discovered element till today are.

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140

118

90

16

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