Question

In which of the following reactions heterogeneous catalysis
is involved?
(i) 2SO₂ (g) +O₂ (g) □(→┴NO(g) )2SO₃ (g)
(ii) 2SO₂ (g) + □(→┴Pt(s) ) 2SO₃ (g)
(iii) N₂ (g) + 3 H₂ (g) □(→┴Fe(s) ) 2NH₃ (g)
(iv) CH₃COOCH₃ (????) + H₂O (????) □(→┴HCI(????) )CH₃COOH (aq)
+ CH₃OH(aq)
(a) (ii), (iii) (b) (ii), (iii) and (iv)
(c) (i), (ii) and (iii) (d) (iv)

Answer 1

(ii), (iii) is the correct answer.

Explanation:

• Heterogeneous catalysis is defined as the catalysis where the catalyst used in a reaction is in different state than the reactants.

• For the 1st reaction, we can see that the SO2 reacts with O2 to form SO3 in presence of catalyst NO.

• Here both the reactants and products are in gaseous state.

• In reaction 2, 2SO2 reacts with oxygen to form SO3 in presence of platinum catalyst.

• Here the state of catalyst is solid and that of reactants and product is gaseous.

• So its an example.

• In reaction 3, nitrogen and hydrogen reacts to form ammonia in presence of iron catalyst.

• So it's also an example of heterozygous catalysis.

• In the final reaction, methyl acetate reacts with water in presence of hydrochloric acid to form acetic acid and methanol.

• Here state of catalyst and reactants and products are in same state.

• So its not an example.

For more information about heterozygous catalyst,

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Give four examples of heterogeneous catalysis. - Brainly.in