Which of the following is not true for $(i)$ $Zn +$ dilute $HCl$ and $(ii)$ $Zn +$ concentrated $HCl$?
- ABoth reactions produce $H_2$ gas.
- BBoth reactions are exothermic.
- CThe rate of reaction is faster in $(ii)$ than in $(i)$.
- DThe reaction $(ii)$ is not possible.
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