Question # 1

Temporary hardness is removed by adding.

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Quick lime

Slaked lime

Lime stone

Lime water.

Hookworm is a parasite that infects the:

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large intestine

small intestine

stomach

liver

Water molecule has a structure:

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Ionic

Non polar

Tetrahedral

Polar

Which is not a heavy metal.

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Cadmium

Lead

Zinc

Murcury

Vibrious cholera causes.

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Choleera

Dysentery

Fluorsis

Hepatitis

Which one of the following properties of water is responsible for rising of water in plants?

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Specific heat capacity

Viscosity

Excellent solvent action

Capillary action

Which ion cause water hardness?

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Al²

Mg²

Fe²

Na²

Which disease cause liver inflammation?

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Typhoid

Jaundice

cholera

Hepatitis

How many times the heat capacity of water is greater than that of rocks.

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Two

Three

Four

Six

Which salt cause permanent hardness in water is:

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Ca(HCO₃)₂

Mg(HCO₃)₂

CaCl₂

KCl

Cholera is caused by

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Protozoa

Virus

Bacteria

Fungi

Rapid growth of algae in water bodies in because of detergent having.

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Carbonat salt

Sulphonic acid

Sulphat salt

Phosphate salt

How many percentage to water contains oceans?

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67%

77%

87%

97%

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