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NTA Abhyas NEET2020ChemistryChemical EquilibriumPractice

At constant pressure, addition of helium to the reaction system : N 2 (g) + 3H 2 (g)  ⇌ 2NH 3 (g)

Options

  1. AFavours the formation of ammonia
  2. BReduces the formation of ammonia
  3. CDoes not affect the position of equilibrium
  4. DReduces the dissociation of ammonia.

Correct answer

B. Reduces the formation of ammonia

Step-by-step solution

K p = n 2 N H 3 n N 2 × n H 2 3 × P Σ n Δ n At constant pressure, with the introduction inert gas Σ n increases. Since Δ n = – 2 , therefore on increasing Σ n P Σ n Δ n increases, but K p remain constant, hence no. of moles of N 2 g & H 2 g are increased and backward reaction is favoured.

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