Match the following :

(a) Pure nitrogen	(i) Chlorine
(b) Haber process	(ii) Sulphuric acid
(c) Contact process	(iii) Ammonia
(d) Deacon’s process	(iv) Sodium azide or Barium azide

Which of the following is the correct option?

The correct order of the basic strength of methyl substituted amines in aqueous solution is :

What is the correct electronic configuration of the central atom in K₄[Fe(CN)₆] based on crystal field theory?

The structure of intermediate A in the following reaction, is :