Which is the most suitable reagent for the following conversion?
$CH_3-CH=CH-CH_2-CO-CH_3 \rightarrow CH_3-CH=CH-CH_2-COOH$

Contents of three bottles were found to react as follows:
$(i)$ Neither with Fehling's solution nor with Tollen's reagent
$(ii)$ Only with Tollen's reagent but not with Fehling's solution
$(iii)$ With both Tollen's reagent and Fehling's solution.
If they contained either ethanal,propanone,or benzaldehyde,which bottle contained which?

The correct order of decreasing value of $K_{eq.}$ for the addition of $HCN$ to the following carbonyl compounds is:

Reactant	$K_{eq.}$
$PhCHO$	$a$
$CH_3CH_2COCH_3$	$b$
$PhCOCH_3$	$c$
$CH_3CHO$	$d$

An important reaction of acetone is autocondensation in the presence of concentrated sulphuric acid to give the aromatic compound:

$HCDO \xrightarrow[{(50\%)}]{{OH^{-}}}$ Product of this Cannizzaro reaction is:

Arrange the following reagents in the correct order in which the above transformation is carried out: