Match List - I with List - II.

Choose the correct answer from the options given below

We need to match each industrial process/reaction with its correct catalyst.

The reaction

$$2SO_2(g) + O_2(g) \rightarrow 2SO_3(g)$$

is the Contact Process for manufacturing sulphuric acid and uses $$V_2O_5$$ (vanadium pentoxide) as the catalyst, so A matches with (III).

The reaction

$$4NH_3(g) + 5O_2(g) \rightarrow 4NO(g) + 6H_2O(g)$$

is the Ostwald Process for manufacturing nitric acid and uses Pt(s)-Rh(s) (platinum-rhodium gauze) as the catalyst, so B matches with (II).

The reaction

$$N_2(g) + 3H_2(g) \rightarrow 2NH_3(g)$$

is the Haber Process for manufacturing ammonia and uses Fe(s) (finely divided iron with promoters like $$Al_2O_3$$ and $$K_2O$$) as the catalyst, so C matches with (I).

The reaction Vegetable oil(l) + $$H_2$$ $$\rightarrow$$ Vegetable ghee(s) is the hydrogenation of vegetable oils (hardening of oils) and uses Ni(s) (finely divided nickel), known as the Sabatier-Senderens reaction, so D matches with (IV).

Hence, the correct answer is Option B: A-III, B-II, C-I, D-IV.