Question # 1

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

Formula of Decane is.

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C₁₀H₂₀

C₁₀H₂₂

C₁₀ H₄

C₁₀H₁₆

The % age of carbon is lignite is

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60

70

80

90

In laboratory urea was prepared by

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Wohler

Rutherford

Berzelius

Dalton

Identify which one of the following compounds is a ketron?

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(CH₃)₂ CHOH

(CH₃)₂CHCl

(CH₃)₂CO

(CH₃)₂CHCl

Natural gas is 85% methane, It is used to make the follwing except.

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Carbon black

Ethane

Propane

Both b and c

The black residue of the coal tar is called:

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peat

lignite

pitch

matte

Pitch is black residue of

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Coke

Coal-tar

Coal

Coal gas

In which of the following groups , oxygen is attached on both sides with carbon atoms.

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Ketone group

Ether group

Aldehyde group

Easter group

General formula of Alkynes is.

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C₆H_2n-2

C_nH_2n+2

C₁₁H_2n-2

C_nH_2n-2

The % age of carbon is coal is

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40-60

50-70

40-80

40-90

Who put forward '' the vital force theory''?

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Kolbe

Wohler

Berzellius

Jabir - Bin - Hayan

Natural gas contains.

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Methane

Ethane

Propane

All

Percentage of methane present in natural gas is.

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75%

80%

85%

90%

Coal is the mixture of

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Hydrogen

Methane

Carbon monoxide

All

What is the percentage of carbon in anthracite?

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60%

70%

80%

90%

Number of discovered element till today are.

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140

118

90

16

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