Match A and B with (i) and (ii) :

Select from the list — Ammonia, ethane, hydrogen chloride, hydrogen sulphide, ethyne

(i) The gas is used for welding purposes.

(ii) This gas is also a saturated hydrocarbon.

State the conditions required for :

(i) Catalytic hydrogenation of ethyne.

(ii) Preparation of ethyne from ethylene dibromide.

Distinguish between Ethane and ethene (using alkaline potassium permanganate solution)