Question

A gas ‘P’ gives dense white fumes with chlorine. Its aqueous solution gives a blue colour with copper (II) hydroxide (a) Name the gas P. (b) Give its formula (c) Give three uses of P.

Answer 1

(a) The gas is ammonia.
(b) The formula is NH₃.
(c) Uses of ammonia:
It is used in the industrial preparation of nitric acid by Ostwald process.
It is used in the manufacture of fertilizers such as ammonium sulphate, ammonium nitrate,
ammonium phosphate.
It is used in the manufacture sodium carbonate by Solvay process.
NaCl + NH₃ + CO₂ + H₂O → NaHCO₃ +NH₄Cl