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The partial pressures of $C{H_3}OH,\,CO$ and ${H_2}$ in the equilibrium mixture for the reaction $CO + 2{H_2}$ $\rightleftharpoons$ $CH_3OH$ at $427\,^oC$ are $2.0$, $1.0$ and $0.1$ $atm$ respectively. The value of ${K_P}$ for the decomposition of $C{H_3}OH$ to $CO$ and ${H_2}$ is

• A
  $1 \times {10^2}$ $atm$
• B
  $2 \times {10^2}\,at{m^{ - 1}}$
• C
  $50\,\,at{m^2}$
• ✓
  $5 \times {10^{ - 3}}\,at{m^2}$