Question

In which of the following reactions heterogeneous catalysis is involved?
(i) $2SO_2(g) + O_2(g) \xrightarrow[]{NO(g)} 2SO_3(g)$
(ii) $2SO_2(g) \xrightarrow[]{Pt(s)} 2SO_3(g)$
(iii) $N_2(g) + 3 H_2(g) \xrightarrow[]{Fe(s)} 2NH_3(g)$
(iv) $CH_3COOCH_3(l) + H_2O(l) \xrightarrow[]{HCl(l)} CH_3COOH(aq) + CH_3OH(aq)$
(a) (ii), (iii)
(b) (ii), (iii) and (iv)
(c) (i), (ii) and (iii)
(d) (iv)

Answer 1

option b is the answer for the question

Answer 2

In which of the following reactions heterogeneous catalysis is involved?
(i) $2SO_2(g) + O_2(g) \xrightarrow[]{NO(g)} 2SO_3(g)$
(ii) $2SO_2(g) \xrightarrow[]{Pt(s)} 2SO_3(g)$
(iii) $N_2(g) + 3 H_2(g) \xrightarrow[]{Fe(s)} 2NH_3(g)$
(iv) $CH_3COOCH_3(l) + H_2O(l) \xrightarrow[]{HCl(l)} CH_3COOH(aq) + CH_3OH(aq)$
(a) (ii), (iii)
(b) (ii), (iii) and (iv)
(c) (i), (ii) and (iii)
(d) (iv)

(c) (i), (ii) and (iii)