During the production of sulphuric acid by the contact process- the three reactions represented by the equations below occur-Sl - O2g - SO2g2SO2g - O2g - 2SO3gSO3g - H2SO4l - H2S2O7lWhich of the following statements is true for all three of these reactions-

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Preparation of Sulphuric Acid: Contact Process

During the pr...

Question

During the production of sulphuric acid by the contact process, the three reactions represented by the equations below occur.
S(l) + O₂(g) → SO₂(g)

2SO₂(g) + O₂(g) → 2SO₃(g)

SO₃(g) + H₂SO₄(l) → H₂S₂O₇(l)

Which of the following statements is true for all three of these reactions?

All occur at elevated pressures to ensure maximum yield.

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All take place at high temperatures to increase the reaction rate

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All are redox reactions

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All are exothermic

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Solution

The correct option is D All are exothermic
All are exothermic. 1 and 2 are redox, but 3 is not. High temperatures and pressures are not used for all reactions here. For example, 3 takes place rapidly and completely at room temperature and pressure, so elevated pressures and temperatures are not required.

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Similar questions

During the production of sulphuric acid by the contact process, the three reactions represented by the equations below occur.

S(l) + O₂(g) → SO₂(g)

2SO₂(g) + O₂(g) → 2SO₃(g)

SO₃(g) + H₂SO₄(l) → H₂S₂O₇(l)

Which of the following statements is true for all three of these reactions?

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\(2SO_2 (g) + O_2(g) \rightleftharpoons 2SO_3(g)\)

Ideally, which conditions would increase the yield of this reaction?

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During the production of sulphuric acid by the contact process, the three reactions represented by the equations below occur. S(l) + O2(g) → SO2(g) 2SO2(g) + O2(g) → 2SO3(g) SO3(g) + H2SO4(l) → H2S2O7(l) Which of the following statements is true for all three of these reactions?