$3 CH_3COCH_3 \xrightarrow{HCl} (CH_3)_2C = CH - CO - CH = C(CH_3)_2$
This product $B$ is obtained when acetone is saturated with hydrogen chloride gas. $B$ can be:

The structure of the main product $(B)$ of the following reaction will be:

Which of the following organic compounds will give a colored crystalline product with the compound shown in the image?

The reaction sequence is as follows:
$Cyclopentanecarboxamide$ $\xrightarrow{P_2O_5, \Delta} W$ $\xrightarrow{CH_3MgBr, H_3^+O} X$ $\xrightarrow{Ca(OH)_2, I_2 (\text{yellow ppt.})} Y$ $\xrightarrow{\Delta} Z$
$Z$ is:

Which of the following tests can be used to distinguish between $C_2H_5CHO$ and $(CH_3)_2CO$?

In the Cannizzaro reaction given below:
$2PhCHO \xrightarrow{:\mathop{O}\limits^{\ominus}H} PhCH_2OH + PhC\mathop{O_2^{\ominus}}\limits$
the slowest step is: