Difficult
At constant temperature,the equilibrium constant $(K_p)$ for the decomposition reaction $N_2O_4 \rightleftharpoons 2NO_2$ is expressed by $K_p = \frac{4x^2P}{1 - x^2}$,where $P = \text{pressure}$,$x = \text{extent of decomposition}$. Which one of the following statements is true?
- A$K_p$ increases with increase of $P$
- B$K_p$ increases with increase of $x$
- C$K_p$ increases with decrease of $x$
- D$K_p$ remains constant with change in $P$ and $x$
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