JEE PYQ: Chemical Equilibrium Question 7
Question 7 - 2021 (24 Feb Shift 1)
At 1990 K and 1 atm pressure, there are equal number of $\text{Cl}2$ molecules and Cl atoms in the reaction mixture. The value of $K_p$ for the reaction $\text{Cl}{2(g)} \rightleftharpoons 2\text{Cl}_{(g)}$ under the above conditions is $x \times 10^{-1}$. The value of $x$ is ____. (Rounded off to the nearest integer)
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Answer: 5
Solution
Equal moles: $P_{\text{Cl}2} = P{\text{Cl}} = 1/2$. $K_p = \frac{(1/2)^2}{1/2} = 0.5 = 5 \times 10^{-1}$.