Question

Assertion :Assertion : For the reaction:
$N_{2\left(g\right)}+3H_{2\left(g\right)}\rightleftharpoons 2N{H}_{3\left(g\right)},K_p=K_c$ Reason: Reason : Concentration of gaseous reactants and products is taken as unity.

• 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 D If both assertion and reason are false.

$\left(I\right)$ The given reaction is :-

$N_2\left(g\right)+3H_2\left(g\right)\rightleftharpoons 2{NH}_3\left(g\right);K_P=K_C$

we know that, $K_P=K_C{\left(RT\right)}^{△n}$

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

$=2-(3+1)=-2$

$\Rightarrow K_P=K_C{\left(RT\right)}^{-2}$.

$\left(II\right)$ The concentrations of pure solids and liquids are taken as unity.