In the given reaction :
$CH_3CHO$ $\xrightarrow[(i) \ NaCN/HCl]{(ii) \ H_2O/H^{\oplus}/\Delta} (A)$ $\xrightarrow[reagent]{Fenton} (B)$
$(B)$ will be :

The starting material is $CH_3COCH_2CHO$. The reaction sequence is:
$CH_3COCH_2CHO$ $\xrightarrow[{(ii)LiAlH_4}]{{(i)ethylene\,glycol/dry\,HCl}} A$ $\xrightarrow[\Delta ]{H_3O^{+}} B$
What will be $B$?

In which of the following reactions does an aromatic aldehyde react with an acid anhydride in the presence of the salt of the corresponding acid to form an unsaturated aromatic acid?

Positive Tollen's test is observed for

When an aldehyde is treated with an excess of monohydric alcohol,what is formed?

Which of the following does $NOT$ give a yellow precipitate when reacted with a $(NaOH + I_{2})$ mixture?