For the reaction $X_{(g)} + Y_{(g)} \rightleftharpoons Z_{(g)}$ at $550 \ K$,the value of $K_c$ is $10^{-4} \ mol^{-1} \ L$. If at equilibrium $[X] = \frac{1}{2}[Y] = \frac{1}{2}[Z]$,then the value of $[Z]$ at equilibrium will be:

  • A
    $2 \times 10^{-4} \ M$
  • B
    $1 \times 10^{-4} \ M$
  • C
    $2 \times 10^{4} \ M$
  • D
    $1 \times 10^{4} \ M$

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