Assertion (A): Boiling removes both temporary and permanent hardness from water.
Reason ( R): Bicarbonates of calcium and magnesium undergo decomposition on heating.

Options

A. Both (A) and (R ) are true and (R ) is the correct reason for (A).
B. Both (A) and (R ) are true but (R ) is not the correct reason for (A)
C. (A) is true but (R ) is false
D. (A) is false but (R ) is true.

Answer

D

Explanation

Boiling removes only temporary hardness because soluble bicarbonates of calcium and magnesium undergo decomposition on heating and insoluble carbonates are formed.