Question # 1

Which of the following is the hardest coal?

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Pear

Lignite

Bituminous

Anthracite

Bond energy of C-C is.

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200 KJmol^-1

452 KJmol^-1

300 KJmol^-1

355 KJmol^-1

Carbon content in coke is.

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80%

98%

70%

88%

Molecular formula of butane is

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C₄H₈

C₄H₁₀

C₄H₁₂

C₄H₆

Percentage of carbon in peat is.

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50%

60%

70%

80%

Pitch is black residue of

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Coke

Coal-tar

Coal

Coal gas

Hydrogen atoms preset in pentane are.

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10

12

14

16

The ability of carbon atoms to form chains is called.

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Isomerism

Catenation

Resonance

Condensation

Percentage of methane present in natural gas is.

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75%

80%

85%

90%

Pitch is black residue of.

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Coke

Coal tar

Coal

Coal gas

Coal having 90% carbon contents is called.

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Peat

Lignite

anthracite

bituminous

Coal tar contains compounds

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Benzene

Phenol

Toluene

All

Formula of Methyl alcohol

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CH₅-OH

CH₃-CH₂-OH

All of them

None of these

Aromatic compounds are given this name because of;

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smell they have

slippery touch they have

bitter taste they have

sour taste they have

Identify which one of the following compounds is a ketron?

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(CH₃)₂ CHOH

(CH₃)₂CHCl

(CH₃)₂CO

(CH₃)₂CHCl

____________ is synthetic fiber.

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Cotton

Woal

Nylon

Silk

The 1st organic compound prepared in laboratory.

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Urea

NaCl

Thiourea

Pyridine

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