Question # 1

The boiling point of water is.

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100^oC

4^oC

0^oC

25^oC

At which temperature o water shows mxamimum density.

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0 ^oC

100^oC

4^oC

-4^oC

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

The heat capacity of water is greater than rocks.

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4 times

5 times

6 times

7 times

Which element do not causes toxicity in water?

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Lead

Arsenic

Sodium

Mercury

Temporary hardness of water is removed by adding.

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Ca(OH)₂

NaOH

KOH

CaSO₄

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

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Iodine

Chlorine

Fluorine

Bromine

Which one of the following salts makes the water permanently hard?

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NaCO₃

NaHCO₃

CA(HCO₃)₂

CaSO₄

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

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Two

Three

Four

Six

Which one of the following salts makes the water permanent hard.

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NaCO₃

NaHCO₃

Ca(HCO₃)₂

CaSO₄

The percentage of water in human body is about:

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60%

50%

70%

80%

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