NEET Amines — Set 4

Question 1

The number of lone pairs on nitrogen in $ \ce{(CH3)3N} $ is:

Accepted Answer

In trimethylamine ($ \ce{(CH3)3N} $), nitrogen has three sigma bonds to carbon and one lone pair, as per the PDF’s structure section.

Question 2

Which amine does not react with benzenesulphonyl chloride?

Accepted Answer

Tertiary amines like $ \ce{(CH3CH2)3N} $ lack a hydrogen on nitrogen to form sulphonamides with benzenesulphonyl chloride, unlike primary and secondary amines.

Question 3

An amine $ X $ reacts with $ \ce{CH3CH2Cl} $ to form a tertiary amine. $ X $ could be:

Accepted Answer

A secondary amine like $ \ce{CH3NHCH3} $ reacts with $ \ce{CH3CH2Cl} $ to add an ethyl group, forming a tertiary amine ($ \ce{CH3CH2N(CH3)2} $), as per the PDF’s alkylation.

NEET Chemistry: Amines — Practice Set 4

Q1. The number of lone pairs on nitrogen in \( \ce{(CH3)3N} \) is:

Q2. Which amine does not react with benzenesulphonyl chloride?

Q3. An amine \( X \) reacts with \( \ce{CH3CH2Cl} \) to form a tertiary amine. \( X \) could be:

Q4. Which amine produces a yellow oily liquid on reaction with \( \ce{HNO2} \)?

Q5. Which amine turns bromine water colorless due to substitution?

Q6. An amine \( X \) reacts with \( \ce{CHCl3} \) and KOH to form \( \ce{CH3CH2NC} \). \( X \) is:

Q7. A primary amine \( X \) reacts with \( \ce{HNO2} \) to give \( \ce{CH3CH2CH2CH2OH} \). \( X \) is:

Q8. The product of \( \ce{CH3CH2NH2} \) with \( \ce{CH3CH2CH2COCl} \) is:

Q9. The basic strength of aniline is less than aliphatic amines due to:

Q10. The number of lone pairs on nitrogen in \( \ce{CH3CH2NHCH3} \) is: