MCQ

MCQ 11 Mark

The content of dissolved oxygen decreases with increase of

A
pressure
✓
temperature
C
moisture
D
all of these

Answer

Correct option: B.

temperature

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MCQ 21 Mark

Which of the following does not cause hardness of water?

A
Calcium bicarbonate
✓
Sodium bicarbonate
C
Magnesium chloride
D
Calcium sulphate

Answer

Correct option: B.

Sodium bicarbonate

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MCQ 31 Mark

The presence of bicarbonates of calcium and magnesium causes

✓
temporary hardness of water
B
permanent hardness of water
C
temporary and permanent hardness of water
D
none of these

Answer

Correct option: A.

temporary hardness of water

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MCQ 41 Mark

Temporary hardness of water can be removed by

A
freezing
✓
boiling
C
melting
D
all of these

Answer

Correct option: B.

boiling

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MCQ 51 Mark

Water reacts with carbon dioxide to form

✓
carbonic acid
B
sulphuric acid
C
hydrochloric acid
D
none of these

Answer

Correct option: A.

carbonic acid

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MCQ 61 Mark

The metal that reacts with water to liberate hydrogen gas is

✓
sodium
B
gold
C
mercury
D
silver

Answer

Correct option: A.

sodium

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MCQ 71 Mark

Chlorination of water is done by using

✓
bleaching powder
B
bromine gas
C
sulphur dioxide gas
D
hydrogen gas

Answer

Correct option: A.

bleaching powder

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CHEMISTRY MCQ

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