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Question

4 moles of HI are taken in a 1 litre closed vessel and heated till equilibrium is attained. At equilibrium, the concentration of H2 is 1 mol L1. What is the equilibrium constant?

A
4
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B
0.5
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C
2
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D
0.25
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Solution

The correct option is D 0.25
HIH2+I2Initial400Equilibrium(42)1.01.0

Keq=[H2][I2][HI]2=1×1(2)2=14=0.25

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