Ammonia reacts with conc. hydrochloric acid to form _________ coloured vapours.
Hydrochloric acid reacts with a metal X to form a gas Y which burns with a 'pop' sound. Sodium hydroxide solution also reacts with the same metal X (on heating) to form the same gas Y.
(a) Name X and Y.
(b) Write the chemical equation of the reaction of metal X with
(i) hydrochloric acid,
(ii) Sodium hydroxide solution.