MCQ-46
Which of the following gives a positive iodoform test as well as a silver mirror test
A. 3-pentanone
B. Propanal
C. Ethanal
D. Acetone
Answer: C
MCQ-47
Aldehydes and small methyl ketones react with a saturated aqueous solution of sodium bisulphite to form a crystalline
A. Yellow precipitate
B. Brick red precipitate
C. Wine red precipitate
D. White precipitate
Answer: D
MCQ-48
Aldehyde and ketone react with hydroxylamine to form _______
A. Hydrazone
B. Acetal
C. Oxonium ion
D. Oxime
Answer: D
MCQ-49
Reaction of ethanal and propanone with HCN is example of ____________ reaction.
A. Nucleophilic substitution
B. Addition-Elimination
C. Electrophilic addition
D. Nucleophilic addition
Answer: D
MCQ-50
Aldehyde and ketone react with 2,4-DNPH to form ________
A. Hydrazone
B. Acetal
C. Oxonium ion
D. Oxime
Answer: A
