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Question

The equilibrium SO2Cl2(g)SO2(g)+Cl2(g) is attained at 25oC in a closed container and helium gas is introduced keeping equilibrium pressure constant. Which of the following statement(s) is/are correct?

A
Concentration of SO2Cl2,SO2 & Cl2 change
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B
More chlorine is formed
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C
Concentration of SO2 reduced
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D
Concentration of SO2Cl2 is reduced
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Solution

The correct options are
B Concentration of SO2Cl2,SO2 & Cl2 change
C More chlorine is formed
D Concentration of SO2Cl2 is reduced
The addition of inert gas at equilibrium keeping the pressure constant causes the system to move in the direction of larger number of gaseous molecules.
In the reaction for the dissociation of SO2Cl2, the equilibrium will shift in the forward direction when an inert gas is added at constant pressure. Due to this, the concentrations of
SO2Cl2,SO2 and Cl2 will change. The concentration of SO2Cl2 will decrease and the concentrations of SO2 and Cl2 will increase. Hence, the options A, B and D are correct.

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