<p>How would you account for the following:</p>

<p>(i) Highest fluoride of Mn is&nbsp;<span class="equation">\(MnF_4\)</span>&nbsp;whereas the highest oxide is <span class="equation">\(Mn_2O_7\)</span>.​​​​​​​​​​​​​​</p>

<p>(ii) Transition metals and their compounds show catalytic properties.</p>