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Q.

In the preparation of H₂SO₄, by Contact process V₂O₅ is used as a catalyst in the reaction.

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a

${SO}_{3} + H_{2} O ⟶ H_{2} {SO}_{4}$

b

${SO}_{3} + H_{2} {SO}_{4} ⟶ H_{2} S_{2} O_{7}$

c

${SO}_{2} + O_{2} ⟶ 2 {SO}_{3}$

d

$S + O_{2} ⟶ {SO}_{2}$

answer is D.

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Detailed Solution

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In the contact process ,for the manufacturing of H₂SO₄, V₂O₅ is used to as a catalyst for the oxidation of SO₂ to SO₃ -

2SO₂(g)+ O₂(g) $\overset{V_{2} O_{5}}{\to}$ 2SO3(g)

The production of SO3 is used to make H₂SO₄ on industrial scale .

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