Question # 1

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

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Carbon

Oxygen

Air

Hydrogen

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

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Triatomic

Diatomic

Polyatomic

None of these

The most common element in the universe is

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oxygen

hydrogen

nitrogen

iron

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

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photosynthesis

respiration

oxidation

vaporization

The process which loops the amount of nitrogen constant in air is

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nitrogen fixation

nitrogen cycle

oxidation

photosynthesis

What type of liquid has abnormal freezing and boiling point.

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Water

Juice

Petrol

Diesel

Bucky Ball is teh third form of pure.

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Carbon

Graphite

Magnesium

Diamond

The percentage of Neon by volume is.

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0.002

0.9

0.02

0.00055

The sun almost entirely consists to the element

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oxygen

iron

phosphorus

hydrogen

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

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10

25

35

45

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

The percentage of nitrogen in air is

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76%

77%

78%

79%

Oxygen and nitrogen react to form.

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Nitric Acid

Nitrogen oxide

Nitrogen peroxide

Nitrate

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

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

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

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Nitrogen cycle.

Carbon cycle

Nitrogen fixation

Water cycle

Which Gas is essential for proteins.

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Sulphur

Hydrogen

Nitrogen

Oxygen

An essential component of haemoglobin

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sodium

Neon

iron

Aluminium

The contents of sodium in leaf tissus vary from.

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0.01 - 10%

10-15%

12-16 %

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