State reasons for the following statements:

(a) Tap water conducts electricity, whereas distilled water does not.

(b) For dilution of an acid, acid is added into water and not water into acid.

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Solution

(a) Tap water contains electrolytes, presence of electrolytes increases the number of ions that help in conduction of electricity in liquids. Distilled water has negligible number of ions as compared to tap water. Deficiency of ions in distilled water makes it a poor conductor of electricity.

(b) Adding water to acid is highly exothermic. If water is added to acid, the acid may splash out and may cause accidents. Hence acids are added to water with regular stirring.

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Similar questions

(i) State reasons for the following statements:

(a) Tap water conducts electricity, whereas distilled water does not.

(b) During the summer season, a milkman usually adds a very small amount of baking soda to fresh milk.

(c) For dilution of acid, acid is added into water and not water into acid.

(d) Dry hydrogen chloride gas does not turn blue litmus red whereas dilute hydrochloric acid does.

(ii) How is Bleaching powder prepared? Give its important uses?

Explain why

A. Aqua solution of an acid conduct electricity.

B. For a dilution of acid acid is added into water and not water into acid.

State reasons for the following statements:

(a) Tap water conducts electricity, whereas distilled water does not.

(b) During the summer season, a milkman usually adds a very small amount of baking soda to fresh milk.

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