MolSynapse
question bank
All chapters
NEET
JEE
Practice
MolSynapse
/
Question bank
/
Aldehydes, Ketones and Carboxylic Acids
/
Nucleophilic addition and addition-elimination reactions
NEET level
Single correct option
Difficulty 1 of 3
co027
Which of the following is the most reactive towards nucleophilic addition?
A
C
X
6
H
X
5
CHO
B
CH
X
3
CHO
C
CH
X
3
COCH
X
3
D
HCHO
Answer: D
Formaldehyde has no electron-donating alkyl or aryl group and the least steric hindrance. Hence its carbonyl carbon is the most electrophilic.
Practice Aldehydes, Ketones and Carboxylic Acids
More on Nucleophilic addition and addition-elimination reactions
Previous question
Next question
More questions on Nucleophilic addition and addition-elimination reactions
A mixture of benzaldehyde and benzophenone is shaken with saturated aqueous NaHSO3. Which procedure gives back pure benzaldehyde?
JEE Main level
Which order correctly shows increasing reactivity towards nucleophilic addition of HCN?
JEE Main level
Cyclohexanone is heated with pyrrolidine (a cyclic secondary amine) and a catalytic amount of acid, with water being removed. The product is
JEE Main level
Propanone reacts with the ylide (C6H5)3P=CH2 (Wittig reaction). The organic product is
NEET level
Ethanal reacts with hydroxylamine, NH2OH, in weakly acidic medium to give
NEET level
The rate of formation of an oxime from acetone and NH2OH is greatest near pH 4.5 and falls at both lower and higher pH. The best explanation...
JEE Main level