The product formed when formaldehyde reacts with ammonia is

$Ph-CH=CH-CHO + CH_3-CH=CH-CHO \xrightarrow[EtOH, \Delta]{\text{base}} (A) (87\%)$; The product of this reaction is:

Consider the following reaction sequence:
$4\text{-aminobenzonitrile}$ $\xrightarrow[(ii) H_2O]{(i) AlH(i-Bu)_2} 'A'$ $\xrightarrow[dil. NaOH, \Delta]{CH_3CHO} B$
The product $B$ is?

Based on the reaction sequence shown,select the incorrect statement about $P_2$. The reaction starts with cyclohexanone reacting with $Mg-Hg/H_2O$ to form $P_1$,which then reacts with conc. $H_2SO_4$ and heat to form $P_2$.

Which of the following tests is $NOT$ shown by acetaldehyde?

What are the products formed when $(i)$ $HCHO$,$(ii)$ $CH_3CHO$,and $(iii)$ $CH_3COCH_3$ are reacted with $CH_3MgBr$ followed by hydrolysis?