Sodium form a crystalline ionic solid with dihydrogen. The solid is non-volatile and non-conducting in nature. It reacts violectly with water to produce dihydrogen gas. Write the formula of this compound and its reaction with water. What will happen on electroysis of the melt of this solid?

Stability of a crystal is reflected in the magnitude of its melting point'. Comment. Collect melting points of solid water, ethyl alochol, diethyl ether and methane from a data book. What can you say about the intermolecular forces between these molecules?

A sweet smelling organic compound (A) is slowly oxidised by air in presence of light to a highly poisonous gas on warming with silver powder, it forms a gaseous substance (B), which is also produced by the action of calcium carbide on water. Identify (A) and (B) and write the chemical equations of the reactions involved.

A sweet smelling organic compound 'A' is slowly oxidised by air in presence of light to a higly posionous gas. On warming compound A with silver powder, it forms a gaseous substance 'B' which is also produced by the action of calcium carbide on water. identify 'A' and 'B' and write the chemical reactions involved.