Question # 1

Which ion cause water hardness?

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Al²

Mg²

Fe²

Na²

The process of removing temporary hardness of water.

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Clark's method

Washing soda method

Sodium zeolite

Filteration method

Hookworm is a parasite that infects the:

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large intestine

small intestine

stomach

liver

Sodium zeolite is naturally occurring reason of .

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NaAl (SiO₃)₂

Na₂CO₃

CaCO₃

Na₂SIO₃

Permanent hardness is removed by adding.

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Na₂ zeolite.

Soda lime

Lime water

Quick lime

Permanent hardness can be removed by using .

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Soda lime

Sodium Zeolite

Quick lime

Lime water

Hard water can cause.

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Stomach disorder

Boiler blasts

Inefficiency of engine

All of them

The surface tension of water is:

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very low

moderate

high

zero

The salts of which element are present in detergent that causes the rapid growth of algae in water bodies is.

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Phosphate

Calcium

Sodium

All of them

Which of the following gas is used to destroy harmful bacteria in water.

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Iodine

Chlorine

fluorine

Bromine

Which is not a heavy metal.

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Cadmium

Lead

Zinc

Murcury

Which salt cause permanent hardness in water is:

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Ca(HCO₃)₂

Mg(HCO₃)₂

CaCl₂

KCl

Which disease is caused by polluted water.

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Cholera

Typhoid

Diarrhea

All of them

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Chemistry 10th Class English Medium Unit 15 Online Test MCQs With Answers

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