MCQ
$C-C$ bond length is maximum in
- A$CH_2=CH_2$
- B$CH \equiv CH$
- ✓$CH_2=CH-CH=CH_2$
- D$CH_2=C=CH_2$
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$C{H_3}COOH\xrightarrow{{LiAl{H_4}}}A\mathop {\xrightarrow{{{H^ + }}}}\limits_{443\,K} B\xrightarrow{{B{r_2}}}C\mathop {\xrightarrow{{alc.}}}\limits_{KOH} D$