An organic compound produces acetic acid and ethanol on acid hydrolysis. Write the structural formula of the compound. How can you prepare the compound from acetaldehyde in one step?

Write the structures of $\mathrm{A}$ to $\mathrm{D}$ in the following reactions:

$\mathrm{RCOR}\text{'}\stackrel{{\mathrm{NH}}_2{\mathrm{NH}}_2}{\to }\mathrm{A}\underset{\mathrm{ethylene} \mathrm{glycol}, {180}^{\mathrm{o}}\mathrm{C}}{\overset{{\mathrm{C}}_2{\mathrm{H}}_5\stackrel{-}{\mathrm{O}}\stackrel{+}{\mathrm{Na}}}{\to }}\mathrm{B}$

${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{CO}}_2\mathrm{Ag}\underset{{\mathrm{CCl}}_4}{\overset{{\mathrm{Br}}_2}{\to }}\mathrm{C}$

${\mathrm{CH}}_3\mathrm{CHO}+{\mathrm{NaHSO}}_3\to \mathrm{D}$

Convert the following:

(p) Benzaldehyde to Cinnamic acid.

(q) Acetic acid to acetaldehyde.

Mention the reagents used for the following conversions:

(m) ${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{CH}}_3\stackrel{\mathrm{A}}{\to }{\mathrm{C}}_6{\mathrm{H}}_5\mathrm{CHO}$

(n) ${\mathrm{CH}}_3\mathrm{CHO}\stackrel{\mathrm{B}}{\to }{\mathrm{CH}}_3{\mathrm{COOC}}_2{\mathrm{H}}_5$

(o) ${\mathrm{C}}_6{\mathrm{H}}_5\mathrm{CHO}\stackrel{\mathrm{C}}{\to }{\mathrm{C}}_6{\mathrm{H}}_5\mathrm{COCH}\left(\mathrm{OH}\right){\mathrm{C}}_6{\mathrm{H}}_5$

(p) ${\mathrm{CH}}_3{\mathrm{COCH}}_3\stackrel{\mathrm{D}}{\to }{\left({\mathrm{CH}}_3\right)}_2\mathrm{C}\left(\mathrm{OH}\right){\mathrm{CH}}_2{\mathrm{COCH}}_3$

(q) ${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{COOH}\stackrel{\mathrm{E}}{\to }{\mathrm{CH}}_3\mathrm{CH}\left(\mathrm{Br}\right)\mathrm{COOH}$

(r) ${\mathrm{CH}}_3{\mathrm{COCH}}_3\stackrel{\mathrm{F}}{\to }{\mathrm{CH}}_3{\mathrm{COCH}}_2\mathrm{Br}$