Question

(i) $Ti$ is purified by Van Arkel method. In it, the formula of metal iodide vapour formed is $Ti{I}_p$.
(ii) The oxidation state of $Fe$ in Fool's gold is q.
(iii) In the test of $N{i}^{2+}$, a rosy red ppt. of $\left[Ni\right(dmg{)}_2]$ is formed.
In it, r five membered rings and s six membered H-bonding rings are formed.
Then, the value of $\frac{p+q+r+s}{2}$ is:

Answer 1

= $\frac{p+q+r+s}{2}$
= $\frac{4+2+2+2}{2}$
= 5