One litre solution of $MgCl_2$ is electrolyzed completely by passing a current of $1 \ A$ for $16 \ min \ 5 \ sec$. The original concentration of $MgCl_2$ solution was (Atomic mass of $Mg = 24$)

  • A
    $0.5 \times 10^{-3} \ M$
  • B
    $1.0 \times 10^{-2} \ M$
  • C
    $5 \times 10^{-3} \ M$
  • D
    $5 \times 10^{-2} \ M$

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