The process used for the removal of hardness of water is

The metal salts formed during the softening of hard water using $Clark's$ method are:

Which of the following can effectively remove all types of hardness of water?

Amongst the following,the form of water with the lowest ionic conductance at $298 \ K$ is

Which of the following is the best scientific method to test the presence of water in a liquid?

Statements about heavy water are given below.
$A.$ Heavy water is used in exchange reactions for the study of reaction mechanisms.
$B.$ Heavy water is prepared by exhaustive electrolysis of water.
$C.$ Heavy water has higher boiling point than ordinary water.
$D.$ Viscosity of $H_2O$ is greater than $D_2O$.