Question # 1

Temporary hardness in water can he removed by.

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Boiling Method

Using washing soda

Using sodium zeolite

All of them

The major constituents of troposphere are:

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carbon dioxide and argon

nitrogen and oxygen

argon and oxygen

carbon dioxide and oxygen

Ozone id beneficial for us as it:

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absorbs infrared radiations

absorbs ultraviolet radiation

absorbs chlorofluorocarbons

absorbs air pollutants

Concentration is a separating technique in which mineral is separated from.

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Gangue

Silicates

Aluminates

All

There are ____________ types of salts.

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2

3

6

8

The percentage of protein in dry weight of cell.

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20%

40%

50%

70%

Ammonia is prepared by:

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Solvay's process

Haber's process

Floatation process

Bayer's process

Chemical formula of chloroform.

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CH₃Cl

CH₂O₂

CHCl₂

CCl₄

Which disease cause liver inflammation?

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Typhoid

Jaundice

cholera

Hepatitis

Earth has natural systems.

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One

Two

Three

Four

Water molecule has a structure:

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Ionic

Non polar

Tetrahedral

Polar

Monosaccharide consists of number of carbon atoms.

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2 to 4

4 to 8

3 to 9

5 to 10

Essential components of every living all are.

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Nucleic acids

Enzymes

Lipids

Cell wall

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