For which of the following KP is less than Kc?

N2O4 2NO2

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N2 + 3H2 2NH3

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H2 + I2 2HI

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CO + H2O CO2 + H2

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Solution

The correct option is B
N2 + 3H2 2NH3

$K_{P} = K_{C} (R T)^{△ n}$

For the reaction

$N_{2} (g) + 2 H_{2} (g) ⇌ 2 N H_{3} (g)$

$△ n = (2) - (4) = - 2$

$K_{P} = K_{C} (R T)^{- 2}; ∴ K_{P} < K_{C}$

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