The process of caustification is used for the preparation of which of the following?

The metal-pair that can produce nascent hydrogen in alkaline medium is

The blue color of a solution of sodium in liquid ammonia is due to:

Sodium metal cannot be stored under

The hydroxides and carbonates of sodium and potassium are easily soluble in water,while the corresponding salts of magnesium and calcium are sparingly soluble in water. Explain.

Mercury is transported in containers made of