Question # 1

Teh process of converting atompspheric nitrogen to useable from is called.

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Nitrogen cycle.

Carbon cycle

Nitrogen fixation

Water cycle

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

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carbon

nitrogen

hydrogen

oxygen

If a key is stiff in a lock, rub the end of the key a soft pencil, which types of elements we obtain.

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Graphite

Silver

Gold

Paltinum

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

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Triatomic

Diatomic

Polyatomic

None of these

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

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Carbon

Oxygen

Air

Hydrogen

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

Which Gas is essential for proteins.

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Sulphur

Hydrogen

Nitrogen

Oxygen

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

Bucky Ball is teh third form of pure.

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Carbon

Graphite

Magnesium

Diamond

The contents of sodium in leaf tissus vary from.

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0.01 - 10%

10-15%

12-16 %

It is an organic compound

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natural gas

ammonium

water

sodium chlorides

The amout of carbon dioxide int eh air is increased by.

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Photosynthesis

Respiration

Burning

Evaporation

The deficiency of iodine in human body casue.

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Goiter

Cancer

Tuberculosis

Cholera

The compounds consisting of Amino acids are called

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carbohydrate

Fast

Proteins

organic compounds

Which gas is slightly soluble in water.

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Neon

Carbon di oxide

Argon

Oxygen

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

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10

25

35

45

It is an important constituent of DNA and RNA our body

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Iron

Chlorine

Fluorine

Phosphorus

The sun almost entirely consists to the element

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oxygen

iron

phosphorus

hydrogen

Oxygen and nitrogen react to form.

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Nitric Acid

Nitrogen oxide

Nitrogen peroxide

Nitrate

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