Name the sodium compound which is used for softening hard water.
A milkman adds a very small amount of baking soda to fresh milk.
$(a)$ Why does he shift the $pH$ of the fresh milk from $6$ to slightly alkaline ?
$(b)$ Why does this milk take a long time to set as curd ?
A solution reacts with crushed egg-shells to give a gas that turns lime water milky. The solution contains
What will happen if a solution of sodium hydrocarbonate is heated ? Give the equation of the reaction involved.
Why does distilled water not conduct electricity, whereas rain water does ?