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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