A) volatile stable compound
B) non-volatile stable compound
C) volatile unstable compound
D) None of the above
Correct Answer: A
Solution :
van-Arkel method of purification of metals involves conversion of an impure metal to a volatile stable compound. \[\underset{impure\,metal}{\mathop{Ti}}\,+2{{I}_{2}}\xrightarrow{500K}\underset{\begin{smallmatrix} volatile\,stable \\ compound \end{smallmatrix}}{\mathop{Ti{{I}_{4}}}}\,\] \[\xrightarrow{1700K}\underset{\begin{smallmatrix} pure \\ metal \end{smallmatrix}}{\mathop{Ti}}\,+2{{I}_{2}}\]
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