At a certain temperature and a total pressure of 105 Pa, iodine vapours contain 40% by volume of iodine atoms at equilibrium [I2(g)⇌2I(g)] . Kp for the equilibrium will be

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0.67

1.5

2.67×104

9.0×104

answer is C.

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Detailed Solution

I2(g)⇌2I(g) ∵XI2+XI=1 XI=40%=0.4 ⇒XI2=0.6 60%=0.6 Kp=(0.4×105)20.6×105 =0.4×105×0.4×1050.6×105 =0.83×105 =2.66×104

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