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Consider the following gas - phase react...

Consider the following gas - phase reaction :
`2A(g)+B(g)rArrC(g)+D(g)`
An equilibrium mixture of reactants and products is subjected to the following changes :-
(I) A decrease in volume
(II) An increase in temperature
(III) Addition of reactants
(IV) Addition of an inert gas at constant volume . Which of these changes affect the composition of the equilibrium mixture but leaves the value of `K_(c)` unchanged : -

A

I, II

B

I, II, III

C

II, III, IV

D

I, III

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