Online Test

Question # 1

Water covers more than

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70% of the surface of the Earth

80% of the surface of the Earth

90% of the surface of the Earth

60% of the surface of the Earth

Water coming out of a natural spring way contain

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Carbon

Oxygen

Nitrogen

Sulphur

Major sources of water pollution are.

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Two

Three

Four

Five

Percentage of fresh water on the Earth is.

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Only one

Only Two

Only Three

Only Four

Earth surface water is found in the oceans.

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About 96%

About 97%

About 98%

About 99%

We add three drops of bleach or chlorine to purify water

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One litres

Two litres

Three litres

Four litres

Water exists in physical states of matter.

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Two

Three

Four

Five

Water freezes at.

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-10 ^oC

10 ^oC

0 ^oC

1 ^oC

The safest way to purity water is.

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Boiling

Filtration

Condensation

Distillation

A water molecule has.

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Three atoms

Four atoms

Five atoms

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