Addition of mole of is made to an equilibrium mixture of in a piston-fitted cylinder

CHEMISTRY · Single correct · A Level · Chemistry · Chemical equilibria (Le Chatelier’s principle and Kc) · Chemical equilibria (Le Chatelier’s principle and Kc)

Problem

Addition of 11 mole of N2\text{N}_2 is made to an equilibrium mixture of PCl5\text{PCl}_5 in a piston-fitted cylinder. Which of the following is correct? (1) No effect on equilibrium constant KcK_c or KpK_p. (2) The degree of dissociation of PCl5\text{PCl}_5 decreases. (3) The volume of the container does not change. (4) No effect on equilibrium concentration.

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