NEET Amines — Set 3

Question 1

The boiling point of $ \ce{(CH3)2NH} $ is lower than $ \ce{CH3CH2NH2} $ due to:

Accepted Answer

$ \ce{(CH3)2NH} $ (secondary) has one N-H bond, while $ \ce{CH3CH2NH2} $ (primary) has two, leading to less hydrogen bonding and a lower boiling point, as per the PDF.

Question 2

Which statement is true about the basicity of $ \ce{C6H5NH2} $ compared to $ \ce{CH3NH2} $?

Accepted Answer

Aniline ($ \ce{C6H5NH2} $) is less basic than methylamine ($ \ce{CH3NH2} $) due to resonance delocalizing the nitrogen lone pair, as per the PDF’s basicity section.

Question 3

The hybridization of nitrogen in the product of $ \ce{CH3NH2} $ with $ \ce{CH3COCl} $ is:

Accepted Answer

$ \ce{CH3NH2} $ forms $ \ce{CH3NHCOCH3} $ with $ \ce{CH3COCl} $. Nitrogen has three sigma bonds and one lone pair, remaining $ sp^3 $, as per the PDF’s structure.

NEET Chemistry: Amines — Practice Set 3

Q1. The boiling point of \( \ce{(CH3)2NH} \) is lower than \( \ce{CH3CH2NH2} \) due to:

Q2. Which statement is true about the basicity of \( \ce{C6H5NH2} \) compared to \( \ce{CH3NH2} \)?

Q3. The hybridization of nitrogen in the product of \( \ce{CH3NH2} \) with \( \ce{CH3COCl} \) is:

Q4. How many hydrogen atoms are directly attached to nitrogen in \( \ce{(CH3CH2)2NH} \)?

Q5. The IUPAC name of \( \ce{CH3CH(NH2)CH3} \) is:

Q6. Which method uses phthalimide to prepare primary amines?

Q7. Which of the following has the least number of hydrogen atoms attached to nitrogen?

Q8. What is the major product when aniline reacts with excess bromine water?

Q9. Which of the following amines does not liberate \( \ce{N2} \) gas with \( \ce{HNO2} \)?

Q10. Which method is preferred for preparing primary amines without forming secondary or tertiary amines?