Identify the compound having the highest solubility in water from the following:

Identify the major product of the following reaction:
($1$-hydroxycyclopentyl)methyl bromide + $aq. AgNO_3$ $\rightarrow$ ?

Which product is not obtained when $\text{CH}_3\text{CH}_2\text{OH}$ reacts with $\text{H}_2\text{SO}_4$?

Give the structures of the products you would expect when each of the following alcohols reacts with $(a)$ $HCl - ZnCl_{2}$,$(b)$ $HBr$,and $(c)$ $SOCl_{2}$: $(i)$ $Butan-1-ol$,$(ii)$ $2-Methylbutan-2-ol$.

An unknown compound $D$ is first oxidized to an aldehyde and then to acetic acid by a dilute solution of $K_2Cr_2O_7$ and $H_2SO_4$. The unknown compound $D$ is:

The sum of the number of $\alpha$-hydrogen atoms present in compounds $A$ and $B$ is: