<p>Following are the transition ion of 3d series.</p>

<p><span class="equation">\(Ti^{4+}, V^{2+}, Mn^{3+}, Cr^{3+} \)</span></p>

<p>(Atomic numbers : Ti = 22, V = 23, Mn = 25, Cr = 24)</p>

<p>Answer the following:</p>

<p>(i) Which ion is most stable in aqueous solution and why?</p>

<p>(ii) Which ion is strong oxidising agent and why?</p>

<p>(iii) Which ion is colourless and why?</p>