The reaction of an alkyl halide with moist $Ag_2O$ yields..............

Which reagent is used to prepare alcohol from alkyl halide?

In the following sequence of reactions,the compound $D$ is
$CH_3CH_2OH$ $\xrightarrow{P + I_2} A$ $\xrightarrow[{ether}]{Mg} B$ $\xrightarrow{HCHO} C$ $\xrightarrow{H_2O} D$

Which reaction will give $CH_3-CH(CH_3)-CH(OH)-CH_3$ as a major product?

In the following sequence of reactions $CH_3CH_2OH$ $\xrightarrow{P + I_2} A$ $\xrightarrow[Ether]{Mg} B$ $\xrightarrow{HCHO} C$ $\xrightarrow{H_2O} D,$ then compound '$D$' is

What are $X$ and $Y$ in the following reactions?
$CH_2O \xrightarrow[(ii) H_3O^+]{(i) X} CH_3(CH_2)_2CH_2OH$
$Y \xrightarrow[(ii) H_3O^+]{(i) C_2H_5MgBr} CH_3CH_2C(CH_3)_2OH$