JEE Main 2019 — Chemistry solution

JEE Main2019Chemistry

For the reaction, $2 S O_{2} (g) + O_{2} (g) ⇌ 2 S O_{3} (g)$ ,

$Δ$ H = –57.2 kJ mol^–1 and K_c = 1.7 × 10¹⁶.

Which of the following statement is INCORRECT?

A
The equilibrium constant is large suggestive of reaction going to completion and so no catalyst is required.
B
The addition of inert gas at constant volume will not affect the equilibrium constant.
C
The equilibrium will shift in forward direction as the pressure increases.
D
The equilibrium constant decreases as the temperature increases.

Solution

2SO₂(g) + O₂(g) $⇌$ 2SO₃(g)

K_c = 1.7 × 10¹⁶i.e. reaction goes to completion. Equilibrium constant has no relation with catalyst. Catalyst only affects the rate with which a reaction proceeds.

For the given reaction, catalyst V₂O₅ is used to speed up the reaction (Contact process).

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