Some inert gas is added at constant volume to the following reaction at equilibrium NH4SH(s)⇌NH3(g)+H2S(g)
Predict the effect of adding the inert gas:
A
The equilibrium shifts towards the forward direction
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B
The equilibrium shifts towards the backward direction
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C
The equilibrium remains unaffected
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D
The value of KP is increased
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Solution
The correct option is C The equilibrium remains unaffected When the inert gas is added to the system at constant volume, the partial pressure or the molar concentration of the substance involved in the reaction doesn’t change. So the equilibrium remains undisturbed.