Fehling solution reacts with $HCHO$ to form a precipitate of which color?

Explain the statement: "The $\alpha$-hydrogen of an aldehyde and ketone is acidic."

Calcium butanoate on heating followed by treatment with $1,2-$ethanediol in the presence of a catalytic amount of an acid,produces a major product which is

Acetone reacts with iodine to form iodoform in the presence of

Identify product $B$ in the following reaction: $\text{Propanone}$ $\xrightarrow{\text{Ba(OH)}_2} A$ $\xrightarrow{\Delta, -\text{H}_2\text{O}} B$

$n$-hexane $\xrightarrow{Al_2O_3/\Delta} (A)$ $\xrightarrow{(CO + HCl)/AlCl_3} (B)$. Select the incorrect statement among the following: