Which of the following has least tendency to liberate $\mathrm{H}_{2}$ from mineral acids?
Solution
The metal atom whose oxidation potential is less than that of hydrogen can release $\mathrm{H}_{2}$ from mineral acids.<br/><br/>
$\mathrm{E}_{\mathrm{Zn} / \mathrm{Zn}^{+2}}=0.76$<br/><br/>
$\mathrm{E}_{\mathrm{Ni/Ni}^{+ 2}}=0.25$<br/><br/>
$E_{M n / M n^{+2}}=1.18$<br/><br/>
$\mathrm{E}_{\mathrm{Cu}^{\circ} / \mathrm{Cu}^{+2}}=-0.34$
About this question
Subject: Chemistry · Chapter: d and f Block Elements · Topic: Properties of Transition Metals
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