NEET Amines — Set 5

Question 1

Which of the following is a primary aliphatic amine?

Accepted Answer

Ethylamine ($ \ce{CH3CH2NH2} $) has one alkyl group attached to nitrogen and no aryl group, making it a primary aliphatic amine, as per the PDF’s classification.

Question 2

Which compound is formed when benzyl chloride undergoes ammonolysis followed by reaction with two moles of $ \ce{CH3Cl} $?

Accepted Answer

Benzyl chloride ($ \ce{C6H5CH2Cl} $) with $ \ce{NH3} $ forms benzylamine ($ \ce{C6H5CH2NH2} $), which reacts with two $ \ce{CH3Cl} $ to form $ \ce{C6H5CH2N(CH3)2} $ (N,N-dimethylbenzylamine).

Question 3

Which property of aniline allows it to undergo electrophilic substitution at ortho and para positions?

Accepted Answer

The $ \ce{-NH2} $ group in aniline is electron-donating due to resonance, activating the ring and directing substitution to ortho and para positions, as per the PDF.

NEET Chemistry: Amines — Practice Set 5

Q1. Which of the following is a primary aliphatic amine?

Q2. Which compound is formed when benzyl chloride undergoes ammonolysis followed by reaction with two moles of \( \ce{CH3Cl} \)?

Q3. Which property of aniline allows it to undergo electrophilic substitution at ortho and para positions?

Q4. Which of the following is not a physical property of amines?

Q5. The weakest base in aqueous solution among the following is:

Q6. The strongest base in gaseous phase among the following is:

Q7. The compound formed when ethylamine reacts with chloroform and alcoholic KOH is:

Q8. The hybridization of nitrogen in \( \ce{(CH3CH2)3N} \) is:

Q9. Which amine requires the least number of steps to prepare from \( \ce{CH3Cl} \) using \( \ce{NH3} \)?

Q10. Which amine gives a foul-smelling compound on reaction with \( \ce{CHCl3} \) and alcoholic KOH?