<p>(i) How is the variability in oxidation states of transition metals different from that of the p-block elements?</p>

<p>(ii) Out of&nbsp;<span class="equation">\(Cu^{+}\)</span>&nbsp;and <span class="equation">\(Cu^{2+}\)</span>, Which ion is unstable in aqueous solution and why? ​​​​​​​</p>