Question # 1

Natural gas contains.

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Methane

Ethane

Propane

All

Bond energy of C-C is.

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200 KJmol^-1

452 KJmol^-1

300 KJmol^-1

355 KJmol^-1

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

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Fractional Distilation

Destructive Distiation

Carbonization

Catenation

General formula of alkyl radical is

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C_nH_2n+2

C_nH_2n-2

C_nH_2n+1

C_nH_2n

The % age of carbon is coal is

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40-60

50-70

40-80

40-90

Petroleum is refined by:

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destructive distillation

fractional distillation

simple distillation

dry distillation

Coal is the mixture of

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Hydrogen

Methane

Carbon monoxide

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

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Carbonization

Destructive distillation

Fractional distillation

All

The strone heating of coal in retorts in the absence of air is called.

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Fractional distillation

sublimation

Roasting

Destructive distillation

The % age of carbon is bituminous is

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60

70

80

90

The carbon contents in lignite is.

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80%

50%

60%

70%

Molecular formula of butane is

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C₄H₈

C₄H₁₀

C₄H₁₂

C₄H₆

Pitch is black residue of

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Coke

Coal-tar

Coal

Coal gas

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