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Question

Two samples of HI each of 5 g was taken separately in two vessels of volume 5 lit and 10 lit respectively at 27C. The extent of dissociation of HI will be:

A
More in 5 litre vessel
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B
More in 10 litre vessel
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C
Equal in both vessels
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D
Can't be predicted
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Solution

The correct option is C Equal in both vessels
The equilibrium reaction is 2HI(g)H2(g)+I2(g).

In this reaction, the value of Δn is (1+1)2=0.

The equilibrium of such a reaction is not affected by the change in pressure. Thus the extent of dissociation of HI will be the same in 5 L vessel and 10 L vessel.

Hence, option C is correct.

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