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NEET levelSingle correct optionDifficulty 1 of 3ce173

An inert gas is added at constant temperature and constant pressure to $PCl X_{5} (g) PCl X_{3} (g) + Cl X_{2} (g)$ at equilibrium. The equilibrium

Adoes not shift
Bshifts forward
Cshifts backward
Dshifts forward and $K_{p}$ increases

Answer: B

Constant pressure means the volume increases, lowering the partial pressures; the system opposes this by increasing the number of gas moles (

Δ n = + 1

), so it shifts forward.

K_{p}

depends only on temperature.

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