JEE Main & Advanced Chemistry Equilibrium / साम्यावस्था Question Bank Topic Test - Chemical Equilibrium (6-5-21)

\[CaC{{O}_{3(s)}}\]\[\rightleftharpoons \]\[Ca{{O}_{(s)}}+C{{O}_{2(g)}}\] which of the following expression is correct

A) \[{{K}_{P}}=({{P}_{CaO}}+{{P}_{C{{O}_{2}}}}/{{P}_{CaC{{O}_{3}}}})\]

B) \[{{K}_{P}}={{P}_{C{{O}_{2}}}}\]

C) \[{{K}_{P}}\times ({{P}_{CaO}}\times {{P}_{C{{O}_{2}}}}).{{P}_{CaC{{O}_{3}}}}\]

D) \[\frac{{{K}_{p}}[CaO][C{{O}_{2}}]}{[CaC{{O}_{3}}]}\]

Correct Answer: B

Solution :

[b] \[CaC{{O}_{3(s)}}\]\[\rightleftharpoons \] \[Ca{{O}_{(s)}}+C{{O}_{2(g)}}\]

\[{{K}_{p}}={{P}_{C{{O}_{2}}}}\]

Solid molecule does not have partial pressure so in calculation of \[{{K}_{p}}\]only \[{{P}_{C{{O}_{2}}}}\]is applicable.