<p>Account for the following&nbsp;</p>

<p>(i)&nbsp;<span class="equation">\(Cu^{2+}\)</span>&nbsp;salts are coloured while&nbsp;<span class="equation">\(Zn^{2+}\)</span>&nbsp;salts are white.​​​​​​​</p>

<p>(ii)&nbsp;<span class="equation">\(E^0\)</span>&nbsp;value for the <span class="equation">\(Mn^{3+}/Mn^{2+}\)</span>&nbsp;couple is much more positive than that for <span class="equation">\(Cr^{3+}/Cr^{2+}\)</span>​​​​​​​​​​​​​​</p>

<p>(iii) Transition metals form alloys.</p>