The reagent used to distinguish between acetaldehyde and benzaldehyde is

• Tollen's reagent

• Fehling's solution

• 2-4-dinitrophenyl hydrazine

• semicarbazide

X $\underset{\left(\mathrm{Reductive}\right)}{\overset{\mathrm{Ozonolysis}}{\to }}$ Y + Z

Y can be obtained by Etard's reaction, Z undergoes disproportionation reaction with concentrated alkali. X could be

Acetophenone cannot be prepared easily starting from

• C₆H₅CH(OH)CH₃

• C₆H₅CH₃

• C₆H₅C≡CH

• C₆H₆

Iodoform reaction is answered by all, except

• CH₃-CH(OH)-CH₂-COOH

• CH₃CHO

• CH₃-CH₂-OH

• CH₃-CH₂-CH₂OH

C₆H₅COOH $\underset{\left(\mathrm{ii}\right)\hspace{0.17em}∆}{\overset{\left(\mathrm{i}\right)\hspace{0.17em}{\mathrm{NH}}_3}{\to }} \mathrm{P} \stackrel{\mathrm{NaOBr}}{\to } \mathrm{Q} \underset{\left(\mathrm{ii}\right) \mathrm{Heat} \mathrm{at} 460 \mathrm{K}}{\overset{\left(\mathrm{i}\right)\hspace{0.17em}\mathrm{Conc}. {\mathrm{H}}_2{\mathrm{SO}}_4}{\to }}$ R

R is

• o-bromo sulphanilic acid

• sulphanilamide

• sulphanilic acid

• p-bromo sulphanilamide

The distinguishing test between methanoic acid and ethanoic acid is

• litmus test

• Tollen's test

• esterficiation test

• sodium bicarbonate test

The formation of cyanohydrins from a ketone is an example of

• nucleophilic substitution

• nucleophilic addition

• electrophilic addition

• electrophilic substitution

In the sequence of following reactions

The starting compound P is

• o- nitro toluene

• m-nitro toluene

• o-bromo toluene

• p-nitro toluene

319.

Acetic acid is treated with Ca(OH)₂ and the product so obtained is subjected to dry distillation. The final product is

• propanal

• propanone

• ethanal

• ethanol

An organic compound X is oxidised by using acidified K₂Cr₂O₇ solution. The product obtained reacts with phenyl hydrazine but does not answer silver mirror test. The compound X is,

• 2-propanol

• Ethanal

• Ethanol

• CH₃CH₂CH₃