MCQ
The equilibrium constant for the reaction

$S{O_{3(g)}} \rightleftharpoons S{O_{2(g)}} + 1/2\,{O_{2(g)}}$ is $4.9 \times 10^{-2}$ then find equilibrium constant for the reaction 

$2S{O_{2(g)}} + {O_{2(g)}} \rightleftharpoons 2SO_3(g)$

  • $416$
  • B
    $2.40 \times {10^{ - 3}}$
  • C
    $9.8 \times {10^{ - 2}}$
  • D
    $4.9 \times {10^{ - 2}}$

Answer

Correct option: A.
$416$
a
Let us consider the reverse reaction, equilibrium constant $=\frac{1}{ K ^2}$

New equilibrium constant $=\frac{1}{\left(4.9 \times 10^{-2}\right)^2}$

$=416$

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