$RMgBr$ on reaction with an excess of oxygen followed by hydrolysis gives:

Ethyl magnesium bromide reacts with acetone to give $X$. On hydrolysis,$X$ forms:

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

Propan$-1-$ol can be prepared from propene by

Explain the formation of alcohol from alkene via acid-catalyzed hydration.

Consider the following reaction sequence:
$CH_3-CH(OH)-CH_3$ $\xrightarrow{PBr_3} (X)$ $\xrightarrow{Mg} (Y)$ $\xrightarrow{C_2H_4O (epoxide)} (Z)$ $\xrightarrow{H_2O, \Delta} ?$
What is the final product of this reaction?