Which of the following is not true for $(i)$ $Zn +$ dilute $HCl$ and $(ii)$ $Zn +$ concentrated $HCl$?

  • A
    Both reactions produce $H_2$ gas.
  • B
    Both reactions are exothermic.
  • C
    The rate of reaction is faster in $(ii)$ than in $(i)$.
  • D
    The reaction $(ii)$ is not possible.

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