Q19 / 60 · KVPY 2015 (SA) · Chemistry

Among $\mathrm{Mg}, \mathrm{Cu}, \mathrm{Fe}, \mathrm{Zn}$, the metal that does not produce hydrogen gas in reaction with hydrochloric acid is.

  • Correct answer
    A
    $\mathrm{Cu}$
  • B
    $\mathrm{Zn}$
  • C
    $\mathrm{Mg}$
  • D
    $\mathrm{Fe}$

Solution

Metals having more standard reduction potential than $\mathrm{H}^{+} / \mathrm{H}_{2}(\mathrm{~g})$ can't produce $\mathrm{H}_{2}(\mathrm{~g})$ in acidic medium.

Hence, the correct answer is option: 'A'.

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