Question

Assertion :Assertion : $K_p$ can be less than, greater than or equal to $K_c$ Reason: Reason : Relation between $K_p$ and $K_c$ depends on the change in the number of moles of gaseous reactants and products $\left(△n\right)$.

• A. If both the assertion and reason are true and reason is the correct explanation of assertion.
• B. If both the assertion and reason are true but reason is not the correct explanation of assertion.
• C. If assertion is true but reason is false.
• D. If both assertion and reason are false.

Answer 1

The correct option is A If both the assertion and reason are true and reason is the correct explanation of assertion.

$\left(I\right)$ We have, $K_P=K_C{\left(RT\right)}^{△n}$

$△n=$ No. of moles of (gaseous products - gaseous reactants)

So, $K_P$ can be less than, equal to or greater than $K_C$ according as $△n$ is less than zero, equal to zero or greater than zero.

$\left(II\right)$ $K_P=K_C{\left(RT\right)}^{△n}$

so, the reaction depends on $△n$.