Question # 1

The % age of carbon is coal is

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40-60

50-70

40-80

40-90

The % age of carbon is lignite is

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60

70

80

90

Natural gas contains.

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Methane

Ethane

Propane

All

Number of discovered element till today are.

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140

118

90

16

Vital force theory was rejected by.

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Jabir Bin Hayan

Drawin

Wohler

Berzellius

Carbon content in coke is.

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80%

98%

70%

88%

Petroleum is refined by

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Destructive distillation

Fractional distillation

Simple distillations

Dry distillation

Formula of Decane is.

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C₁₀H₂₀

C₁₀H₂₂

C₁₀ H₄

C₁₀H₁₆

Pitch is black residue of.

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Coke

Coal tar

Coal

Coal gas

Percentage of carbon in peat is.

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50%

60%

70%

80%

Organic compounds contain:

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ionic bond

Covalent bond

Metallic bond

Co-ordinate covalent

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

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Fractional Distilation

Destructive Distiation

Carbonization

Catenation

The % age of carbon in peat is :

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60%

70%

80%

90%

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