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Explanation and answer of this question?  
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Asked by Yasharthshankar121 | 29 Jun, 2020, 18:31: PM
answered-by-expert Expert Answer
Effect I-There will be decrease in temperature at constant volume. The reaction will proceed in the backward direction, the reactant concentration will increase and the product concentration will decrease.
Effect II -It corresponds to the addition of inert gas at constant pressure. The equilibrium will remain unaffected and the concentrations of A and B will not be affected by this change.
Effect III- It corresponds to a decrease in total equilibrium pressure by changing the volume. The equilibrium will shift in the forward direction so that the pressure increases.
Effect IV-It corresponds to the addition of B only at constant volume. The reaction will proceed in the backward direction, the reactant concentration will increase and the product concentration will decrease.

Therefore, the correct option is D
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