NEET Amines — Set 9

Question 1

The reaction of $ \ce{CH3NH2} $ with $ \ce{HNO2} $ produces:

Accepted Answer

Methylamine ($ \ce{CH3NH2} $), a primary aliphatic amine, reacts with $ \ce{HNO2} $ to form methanol ($ \ce{CH3OH} $) and $ \ce{N2} $, as per the PDF.

Question 2

Which amine can be separated from a mixture using the Hinsberg test with alkali?

Accepted Answer

Primary amines like $ \ce{CH3CH2NH2} $ form sulphonamides soluble in alkali, allowing separation, as per the PDF’s Hinsberg test.

Question 3

The reaction of aniline with concentrated $ \ce{H2SO4} $ at 453-473 K produces:

Accepted Answer

Aniline forms anilinium hydrogensulphate, which rearranges on heating to p-aminobenzene sulphonic acid (sulphanilic acid).

NEET Chemistry: Amines — Practice Set 9

Q1. The reaction of \( \ce{CH3NH2} \) with \( \ce{HNO2} \) produces:

Q2. Which amine can be separated from a mixture using the Hinsberg test with alkali?

Q3. The reaction of aniline with concentrated \( \ce{H2SO4} \) at 453-473 K produces:

Q4. Which compound is formed when \( \ce{CH3CH2CONH2} \) reacts with \( \ce{Br2} \) and \( \ce{KOH} \)?

Q5. Which amine has the highest boiling point?

Q6. The number of sigma bonds around nitrogen in \( \ce{CH3NH2} \) is:

Q7. Which amine cannot be prepared by Gabriel phthalimide synthesis?

Q8. The boiling point of \( \ce{CH3NH2} \) is higher than \( \ce{(CH3)3N} \) due to:

Q9. The IUPAC name of \( \ce{(CH3)2NCH2CH3} \) is:

Q10. Which property explains the basic nature of amines?