Question # 1

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 example of heterocyclic compound is.

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Benzene

Hexane

Cyclohexane

Pyridine

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

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Fractional distillation

sublimation

Roasting

Destructive distillation

Coal is blackish complex mixture of compounds of

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Carbon

Hydrogen

oxygen

All

Main component of natural gas is

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Methane

propane

Butane

Propene

Coal is the mixture of

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Hydrogen

Methane

Carbon monoxide

All

Silicon occurs in the form of

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Silica

Silicates

both a and b

None of these

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

Percentage of methane present in natural gas is.

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75%

80%

85%

90%

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

Conversion of dead plants into coal by the action of bacteria and heat is called.

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Carbonization

Catenation

Hydrogenation

Cracking

Which of the following is the hardest coal?

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Pear

Lignite

Bituminous

Anthracite

What one of the following does not contain protein?

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Pulses

Potatoes

Beans

Eggs

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10th Class Chemistry Chapter 11 Organic Chemistry English Medium KPK Boards Online Mcqs MCQs With Answers

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