The major product formed in the reaction is:

What would be the effect of increasing solvent polarity on the rate of each of the following reactions? ($Nu =$ neutral nucleophile)
$A. Nu + R-L \to Nu^{+}-R + L^{-}$
$B. R-L \to R^{+} + L^{-}$

$A$ dihalogen derivative $X$ of a three-carbon hydrocarbon reacts with alcoholic $KOH$ to give another hydrocarbon,which gives a red precipitate with ammoniacal $Cu_2Cl_2$. Reaction of $X$ with aqueous $KOH$ gives an aldehyde. The compound $X$ is .......

The compounds $A$ and $B$ in the following reaction are,respectively:
$Benzene$ $\xrightarrow{HCHO + HCl}$ $A$ $\xrightarrow{AgCN}$ $B$

Which of the following is the correct decreasing order of the boiling point of the given compounds?

In the reaction,$2 A + \text{dry silver oxide} \xrightarrow{\Delta} \text{ether} + 2 \operatorname{Ag} X$,$A$ is a/an