First slide

Hardness of water

Question

Lead pipes are not used for carrying drinking water because

Moderate

A

They are covered with a coating of lead carbonate
B

They are corroded by air and moisture
C

Water containing dissolved air attacks lead forming soluble hydroxide
D

None of these

Solution

Due to plumbosolvency, led dissolves in water to a small extent to form soluble hydroxide which is poisonous so lead pipe is not used carrying drinking water.

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