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KCET2026ChemistryChemical Equilibrium

For the following gaseous reversible reaction: 3 A _ (g) + B _ (g) A ₃ B _ (g) ( _r H = -q kJ ) . The amount of product A ₃ B _ (g) is affected by ____

Options

  1. ATemperature alone
  2. BPressure alone
  3. CBoth temperature and pressure
  4. DTemperature, pressure and catalyst

Correct answer

C. Both temperature and pressure

Step-by-step solution

The given reversible reaction is 3 A _ (g) + B _ (g) A ₃ B _ (g) with _r H = -q kJ . The reaction is exothermic since _r H The change in the number of gaseous moles is n_g = 1 - (3 + 1) = -3 . Since n_g 0 , a change in pressure will also shift the equilibrium position, affecting the amount of product. A catalyst only alters the rate at which equilibrium is attained and does not change the equilibrium composition or the amount of product formed. Therefore, the amount of product A ₃ B _ (g) is affected by both temper

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