The metal used for the de-bromination reaction of $1, 2$-dibromoethane is:

What are $X$ and $Y$ in the following reaction? $Hex-2-ene$ $\xrightarrow{O_3} \text{Ozonide}$ $\xrightarrow{Zn + H_2O} X + Y$

The products $Q$ and $R$ in the following reactions respectively are:
$H_2 + CH_3-C \equiv CH$ $\xrightarrow{\text{Lindlar's catalyst}} P$ $\xrightarrow[Zn + H_2O]{O_3} Q + R$

What is the major product obtained from the debromination of meso-$2,3$-dibromobutane?

Propene on hydroboration followed by oxidation with alkaline peroxide forms.

The number of acyclic structural isomers (including geometrical isomers) for pentene $(C_5H_{10})$ are $......$