Question

In which of the following reactions heterogenous catalysis is involved?

(a) \[\ce{2SO2 (g) + O2 (g) ->[NO(g)] 2SO3 (g)}\]

(b) \[\ce{2SO2 (g) ->[Pt(s)] 2SO3 (g)}\]

(c) \[\ce{N2 (g) + 3H2 (g) ->[Fe(s)] 2NH3 (g)}\]

(d) \[\ce{CH3COOCH3 (l) + H2O (l) ->[HCI(l)] CH3COOH (aq) + CH3OH (aq)}\]

Options

• (b), (c)

• (b), (c), (d)

• (a), (b), (c)

• (d)

Answer 1

(b), (c)

Explanation:

In reaction \[\ce{2SO2 (g) ->[Pt(s)] 2SO3 (g)}\] and reaction \[\ce{N2 (g) + 3H2 (g) ->[Fe(s)] 2NH3 (g)}\], catalysts are in solid state, and reactants and products are gases.