MCQ
Olefins can be hydrogenated by
- AZinc and $HCl$
- BNascent hydrogen
- ✓Raney $Ni$ and $H$
- DLithium hydride in ether

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$I$. $-I$ Effect of nitro group.
$II$. Greater resonance effect of $p-$ nitrophenoxy group
$III$. Steric effect of bulky nitro group
$'X'\,\,\xrightarrow{{water}}$ Insoluble
$'X'\xrightarrow{{5\% \,HCl}}$ Insoluble
$'X'\xrightarrow{{10\% \,NaOH}}$ Insoluble
$'X'\xrightarrow{{10\% \,NaHC{O_3}}}$ Insoluble
When attached to $sp^3$ -hybridized carbon, their leaving group ability in nucleophilic substitution reaction decreases in the order
