An element reacts with hydrogen to form a compound A which on treatment with water liberates hydrogen gas. The element can be

An element reacts with hydrogen to form a compound X which on treatment with water liberates hydrogen gas. The element can be

An element reacts with hydrogen to form a compound A, which of reaction with water liberates hydrogen again. The element is -

Name one element which reacts with hydrogen to form a compound which is strongly acidic in water.

Aluminium reacts with alkalis to liberate hydrogen.

The metal X is prepared by the electrolysis of fused chloride. It reacts with hydrogen to form a colourless solid from which hydrogen is released on treatment with water. The metal is:

The metal A is prepared by the electrolysis of fused chloride. It reacts with hydrogen to form a colourless solid from which hydrogen is released on treatment with water the metal is