Isopropyl alcohol is oxidised with ${\mathrm{K}}_2{\mathrm{Cr}}_2{\mathrm{O}}_7$ and ${\mathrm{H}}_2{\mathrm{SO}}_4$. Write the products giving equation.

Complete the following reactions assigning structures of A, B and C

${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{OH} \stackrel{{\mathrm{PCl}}_5}{\to } \mathrm{A} \stackrel{\mathrm{KCN}}{\to }\mathrm{B} \underset{{\mathrm{H}}_2\mathrm{O}}{\overset{{\mathrm{H}}^{+}}{\to }}\mathrm{C}$