MCQ
$CaC{O_{3(s)}}$ $\rightleftharpoons$ $Ca{O_{(s)}} + C{O_{2(g)}}$ which of the following expression is correct
  • A
    ${K_P} = ({P_{CaO}} + {P_{C{O_2}}}/{P_{CaC{O_3}}})$
  • ${K_P} = {P_{C{O_2}}}$
  • C
    ${K_P} \times ({P_{CaO}} \times {P_{C{O_2}}}).{P_{CaC{O_3}}}$
  • D
    $\frac{{{K_p}[CaO][C{O_2}]}}{{[CaC{O_3}]}}$

Answer

Correct option: B.
${K_P} = {P_{C{O_2}}}$
(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.

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