Free Test Nucleophilic addition – NEET

Q1: Which of the following undergoes nucleophilic addition reaction most readily?

A. Formaldehyde B. Acetone C. Benzaldehyde D. Trichloroacetaldehyde

Q2: Nucleophilic addition reactions are characteristic of which functional group?

A. Alkanes B. Alkenes C. Aldehydes and Ketones D. Carboxylic acids

Q3: What is the product when acetaldehyde reacts with HCN?

A. Alcohol B. Cyanohydrin C. Ketone D. Carboxylic acid

Q4: The nucleophile in the reaction of carbonyl compounds with NaHSO₃ is:

A. SO₃²⁻ B. HSO₃⁻ C. OH⁻ D. H⁺

Q5: Which of the following is least reactive towards nucleophilic addition?

A. Acetaldehyde B. Benzaldehyde C. Acetone D. Formaldehyde

Q6: Nucleophilic addition reactions are facilitated by:

A. High electron density on carbonyl carbon B. Presence of α-Hydrogen C. Polar C=O bond D. All of these

Q7: Which nucleophile is involved in the formation of hemiacetals?

A. ROH B. CN⁻ C. H₂O D. NH₃

Q8: Reaction of a ketone with ammonia derivative like hydrazine results in:

A. Cyanohydrin B. Schiff base C. Hydrazone D. Imine

Q9: Which of the following is not a nucleophile?

A. OH⁻ B. CN⁻ C. NH₃ D. CO₂

Q10: Which reagent is used for the addition of HCN to carbonyl compounds?

A. NaCN/HCl B. KOH C. NH₄Cl D. NaHCO₃

Q11: Which of the following does not undergo nucleophilic addition?

A. Ethanal B. Acetone C. Acetic acid D. Formaldehyde

Q12: Which of the following compounds is most reactive towards nucleophilic addition?

A. Formaldehyde B. Acetone C. Benzophenone D. Benzaldehyde

Q13: Nucleophilic addition of alcohol to aldehyde gives:

A. Ether B. Acetal C. Carboxylic acid D. Ketone

Q14: Which intermediate is formed during addition of HCN to aldehydes?

A. Carbocation B. Carbanion C. Zwitterion D. Tetrahedral intermediate

Q15: Which of the following carbonyl compounds has the highest reactivity?

A. Acetone B. Acetophenone C. Formaldehyde D. Benzaldehyde

Q16: Which nucleophile reacts with aldehydes to give cyanohydrins?

A. CN⁻ B. OH⁻ C. H₂O D. CH₃O⁻

Q17: Nucleophilic addition of Grignard reagent to formaldehyde gives:

A. Primary alcohol B. Secondary alcohol C. Tertiary alcohol D. Aldehyde

Q18: Which compound does not form hydrazone?

A. Acetone B. Formaldehyde C. Acetic acid D. Propanal

Q19: Which functional group in aldehydes makes them reactive to nucleophiles?

A. -CH₃ B. -OH C. C=O D. -COOH

Q20: Addition of water to aldehyde forms:

A. Alcohol B. Acid C. Gem diol D. Aldol

Quiz for Nucleophilic addition