Chemistry - Complete d-block Question with Solution | TestHub

Element $\left(\mathrm{M}\right)$	${\mathrm{E}}^{⊝}/\mathrm{V}$
$\mathrm{Mn}$	$-1.18$
$\mathrm{Ni}$	$-0.25$
$\mathrm{Cu}$	$0.34$
$\mathrm{Zn}$	$-0.76$

As we can see that Copper is least electropositive metal among the given options. So, it does not react with dilute sulphuric acid or other mineral acids, liberating hydrogen because copper is lower in electrochemical series than hydrogen. All other metals will react with mineral acids to liberate hydrogen gas.