Fehling solution is

The products of acid hydrolysis of $P$ and $Q$ can be distinguished by:
$P = H_2C=C(CH_3)(OCOCH_3)$
$Q = H_3C-CH=CH(OCOCH_3)$

The major product formed in the following reaction is:

The reduction of carbonyl compounds with aluminum isopropoxide in excess of isopropanol is known as the Meerwein-Ponndorf-Verley $(MPV)$ reduction. What is the final product when cyclohex$-2-$enone undergoes selective reduction using this method?

$CH_3-CO-CH_3 + [O] \xrightarrow{SeO_2} P + Se + H_2O$. What is $P$ here?

The total number of structural products formed in the following reaction sequence is $CH_3COCl \xrightarrow{i) (CH_3)_2Cd} (P)$; $(P) + CH_3CHO \xrightarrow{ii) NaOH (aq.), \Delta} ?$