In the reaction $CH_2OH-CHOH-CH_2OH + COOH-COOH \xrightarrow{110^\circ C} (A)$,product $(A)$ will be:

Which of the following alcohols undergoes dehydration most easily with concentrated $H_2SO_4$?

Lucas test is used to distinguish between

$(CH_3)_2CHOH$ $\xrightarrow{PCC} X$ $\xrightarrow[(ii) H_2O]{(i) CH_3MgBr} Y$. What is $Y$?

Consider the following reaction sequence:
$CH_3CHO$ $\xrightarrow[(ii) H_3O^+]{(i) CH_3MgBr} A$ $\xrightarrow[\Delta]{Conc. H_2SO_4} B$ $\xrightarrow[(ii) H_2O, OH^-]{(i) B_2H_6} C$
$A$ and $C$ are:

Which of the following compounds will give the iodoform test?