Which of the following alcohols reacts most rapidly with hydrogen halides?

$PCl_5$ reacts with a compound containing

Consider the following reaction sequence: $CH_3CHO$ $\xrightarrow[(ii) H_2O/H^+]{(i) CH_3MgBr} (A)$ $\xrightarrow{H_2SO_4, \Delta} (B)$ $\xrightarrow[(ii) H_2O_2/OH^-]{(i) B_2H_6} (C)$. $(A)$ and $(C)$ are

Identify the product formed when $(R)-2-$butanol and $(S)-2-$butanol react with $(R,R)-$tartaric acid in an acidic medium.

What is the product of the reaction between phenylmagnesium bromide and methanol?

Alcohols combine with acetylene in the presence of mercury compounds as catalyst to form