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NTA Abhyas 2020

Exam: NTA Abhyas
Year: 2020
Subject: Chemistry
Chapter: Chemical Equilibrium

NTA Abhyas 2020 · Chemistry · Chemical Equilibrium

Which is correct relationship between K _ p and K _ c for following...

Which is correct relationship between

{K}_{p} and

{K}_{c}

for following reversible reaction at

\text{10}\text{K}

temperature?

{K}_{p}

and

{K}_{c}

in units of atm and

\text{M}

respectively<br />

{A}_{2} \left(\text{g}\right)\text{+}{\text{3B}_{2} \left(\text{g}\right)⇌ {\text{2AB}}_{3} \left(\text{g}\right)

Options

A ${K}_{p}\text{> }{\text{K}_{c}$
B ${K}_{p}\text{< }{\text{K}_{c}$
C ${K}_{p}\text{=}{\text{K}_{c}$
DRelation cannot be predicted

Correct answer

A. ${K}_{p}\text{> }{\text{K}_{c}$

Step-by-step solution

{K}_{p} \text{=}{K}_{c} {\left(\text{RT}\right)}^{{\text{\Delta n}_{g}}

Here,

\text{RT}\text{=}\dfrac{1}{\text{12}} \text{\times}\text{10}\text{(< 1)}

and

{\text{\Delta n}_{g} \text{=}\text{2} - \text{4}\text{=} - \text{2}

∴ {K}_{p} > {K}_{c}

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