Question # 1

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

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photosynthesis

respiration

oxidation

vaporization

Ice floats on the surface of water due to.

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Higher density

Lower density

Normal density

Very High density

Oxygen and nitrogen react to form.

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Nitric Acid

Nitrogen oxide

Nitrogen peroxide

Nitrate

The process by which green plants manufacture their food is

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respiration

photosynthesis

oxidation

nitrogen fixation

The form of carbon which is not crystalline is.

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Charcoal

Graphite

Bucky Ball

Diamond

Which gas is slightly soluble in water.

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Neon

Carbon di oxide

Argon

Oxygen

The deficiency of iodine in human body casue.

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Goiter

Cancer

Tuberculosis

Cholera

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 amout of carbon dioxide int eh air is increased by.

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Photosynthesis

Respiration

Burning

Evaporation

The percentage of Neon by volume is.

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0.002

0.9

0.02

0.00055

Low iodine availability in humans causes the disease

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Goiter

Cancer

Tuberculosis

Cholera

The percentage of nitrogen in air is

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76%

77%

78%

79%

The density of ice at o°C is & nbsp

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0.918g/cm3

0.618g/cm3

0.718g/cm3

0.8/8 g/cm3

One of the essential part of all living things on the earth

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carbon

nitrogen

hydrogen

oxygen

Coke is formed in the absence of..........

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Carbon

Oxygen

Air

Hydrogen

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