<p>Account for the following:</p>

<p>(i) Mn shows the highest oxidation state of +7 with oxygen but with fluorine, it shows the highest oxidation state of +4.</p>

<p>(ii)&nbsp;<span class="equation">\(Cr^{2+}\)</span>&nbsp;is a strong reducing agent.</p>

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