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Question

In which of the following reactions, increase in the pressure at constant temperature does not affect the moles at equilibrium?

A
2NH3(g)2N2(g)+3H2(g)
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B
C(g)+12O2(g)CO(g)
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C
H2(g)+12O2(g)H2O(g)
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D
H2(g)+I2(g)2HI(g)
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Solution

The correct option is D H2(g)+I2(g)2HI(g)
In the reaction of option D, the total number of moles of reactants is equal to the number of moles of product. For such reactions, when pressure is changed, there is no change in equilibrium.

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