NEET Practice Questions (MCQs) with Answers & Solutions

The given reaction sequence involves the formation of a tertiary alcohol from the ketone upon reaction with EtMgBr and subsequent dehydration to give a trisubstituted alkene. Ozonolysis of this alkene produces diethyl ketone and acetaldehyde, indicating that the original ketone was diethyl ketone.

Propionaldehyde, upon treatment with dilute NaOH, undergoes aldol condensation, forming a β-hydroxy aldehyde. The product formed is 4-hydroxy-2-methylhexanal, with the given structure.

(b) ${\mathrm{CCl}}_3\mathrm{CHO}\stackrel{{\mathrm{H}}_2\mathrm{O}}{\to }{\mathrm{CCl}}_3\mathrm{CH}(\mathrm{OH}{)}_2$

                             Chloral hydrate

(b) Acid derivatives do not show nucleophilic addition. Also, CH₃COOCOCH₃ is less reactive than CH₃CHO.

The slowest step in the Cannizzaro reaction is the hydride transfer from one aldehyde molecule to another. This step involves the transfer of a hydride ion from the α-carbon of one benzaldehyde molecule to the carbonyl carbon of another, forming a benzyl alcohol and a benzonate ion.

(a) Wolff-Kishner's reaction involves reduction of carbonyl compound into alkane using alkaline hydrazine as reducing agent.

(b) Due to bitter almond smell. It is ${\mathrm{CH}}_3\mathrm{O}\left(\mathrm{OH}\right){\mathrm{C}}_6{\mathrm{H}}_3\mathrm{CHO}.$

(a) The name of reaction is Baeyer-Villiger oxidation.

${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{COCH}}_3 \underset{\mathrm{acid}}{\overset{\mathrm{Perbenzoic}}{\to }}{\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{COOCH}}_3$

(c) ${\mathrm{CrO}}_3 \mathrm{or} {\mathrm{CrO}}_2{\mathrm{Cl}}_2$ and a mixture of ${\mathrm{K}}_2{\mathrm{Cr}}_2{\mathrm{O}}_7 + {\mathrm{H}}_2{\mathrm{SO}}_4 + \mathrm{NaCl}$ can also be used.