A pure sample does not give $ppt$ with aq. $AgN{O_3}$.
${(C{H_3})_2}CH - C{H_2}Br\,\,\xrightarrow[{C{H_3}OH}]{{C{H_3}{O^ - }}}$
$\,\text{C}{{\text{H}}_{\text{3}}}\text{Br }\xrightarrow{\text{KCN}}A\xrightarrow{{{H}_{3}}O}B\xrightarrow{LiAl{{H}_{4}}}C$