Question # 1

There are ____________ types of salts.

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2

3

6

8

Which one of the following is polmerized to from benzene?

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ethane

ethene

methane

ethyne

The % age of carbon is coal is

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40-60

50-70

40-80

40-90

Which one of these is used as anaesthesia?

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carbon black

Mehtane

Ethane

Chloroform

The colour of litmus in a strong basic solution become.

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Yellow

Blue

Red

Colourless

The % age of carbon is lignite is

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60

70

80

90

Process of heating the concentrated ore to high temperature in excess of air is called.

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Roasting

Smelting

Bessemerization

All

Which is a Lewis base?

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H⁺

NH₄

BF₃

AlCl₃

Ethen is prepared by heating a mixture of ethanol and excess of concentrated sulphuric acid at:

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150°C

180°C

250°C - 300°C

400°C - 450°C

In which one of the following is a substitution reaction?

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Halogenations of alkynes

Halogenations of alkenes

Halogenations of alkanes

Bromination of alkenes

Which gas is evolved when acids react with carbonates and bicarbonates?

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Carbon monoxide

Carbon dioxide

Hydrogen

Hydrogen chloride

The percentage of water in human body is.

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40%

50%

60%

70%

Formic acid is present in

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String of bees

Sour milk

Apple

Fats

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