Question # 1

The process by which green plants manufacture their food is

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respiration

photosynthesis

oxidation

nitrogen fixation

The body of a young boy contains approximately... litres of water.

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10

25

35

45

Each day a normal man breathe............ litres of air.

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20,000 to 15,000

10,000 to 15,000

15,000 to 20,000

21,000, to 31,000

The percentage of nitrogen in air is

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76%

77%

78%

79%

Nitrogen occur in the atmosphere as................. molecules.

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Triatomic

Diatomic

Polyatomic

None of these

It is an organic compound

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natural gas

ammonium

water

sodium chlorides

The percentage of Neon by volume is.

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0.002

0.9

0.02

0.00055

The contents of sodium in leaf tissus vary from.

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0.01 - 10%

10-15%

12-16 %

Oxygen and nitrogen react to form.

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Nitric Acid

Nitrogen oxide

Nitrogen peroxide

Nitrate

Which Gas is essential for proteins.

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Sulphur

Hydrogen

Nitrogen

Oxygen

The process which increases the amount of carbon dioxide in air is called

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photosynthesis

respiration

oxidation

vaporization

The process which increases the temperature in the temperatureis called

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Photosynthesis

Oxidation

Greenhouse effect

Evaporation

The most common element in the universe is

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oxygen

hydrogen

nitrogen

iron

What type of liquid has abnormal freezing and boiling point.

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Water

Juice

Petrol

Diesel

An essential component of haemoglobin

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sodium

Neon

iron

Aluminium

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