Consider the equilibria $(i)$ and $(ii)$ with equilibrium constants $K_1$ and $K_2$,respectively.
$SO_{2(g)} + 1/2 O_{2(g)} \rightleftharpoons SO_{3(g)} ..... (i)$
$2 SO_{3(g)} \rightleftharpoons 2 SO_{2(g)} + O_{2(g)} ..... (ii)$
$K_1$ and $K_2$ are related as

• A
  $2 K_1 = K_2^2$
• B
  $K_1^2 = \frac{1}{K_2}$
• C
  $K_2^2 = \frac{1}{K_1}$
• D
  $K_2 = \frac{2}{K_1^2}$