<p>Answer the following:</p>

<p>(a) Why are all copper halides known except that copper iodide?</p>

<p>(b) Why is the&nbsp;<span class="equation">\(E^{0}_{V^{3+}/V^{2+}}\)</span>value for vanadium comparatively low?​​​​​​​</p>

<p>(c) Why HCI should not be used for potassium permanganate titrations?</p>

<p>(d) Explain the observations, at the end of each period, there is a slight increase in the atomic radius of d-block elements.</p>

<p>(e) What is teh effect of pH on dichromate ion solution?</p>