NEET Amines — Set 18

Question 1

The product of $ \ce{CH3CONH2} $ undergoing Hoffmann bromamide reaction is:

Accepted Answer

Hoffmann bromamide reaction converts $ \ce{CH3CONH2} $ (ethanamide) to $ \ce{CH3NH2} $ (methylamine), reducing the carbon chain by one, as detailed in the PDF.

Question 2

An alkyl halide $ X $ with $ \ce{NH3} $ gives $ \ce{CH3CH2CH2CH2NH2} $. $ X $ is:

Accepted Answer

1-Chlorobutane ($ \ce{CH3CH2CH2CH2Cl} $) reacts with $ \ce{NH3} $ via ammonolysis to form butan-1-amine ($ \ce{CH3CH2CH2CH2NH2} $), as per the PDF.

Question 3

Which of the following is not a method to prepare primary amines as per the PDF?

Accepted Answer

The PDF lists reduction of nitro compounds, Hoffmann bromamide, and Gabriel synthesis for primary amines. Friedel-Crafts alkylation does not produce amines.

NEET Chemistry: Amines — Practice Set 18

Q1. The product of \( \ce{CH3CONH2} \) undergoing Hoffmann bromamide reaction is:

Q2. An alkyl halide \( X \) with \( \ce{NH3} \) gives \( \ce{CH3CH2CH2CH2NH2} \). \( X \) is:

Q3. Which of the following is not a method to prepare primary amines as per the PDF?

Q4. A compound \( X \) on reduction with \( \ce{H2/Ni} \) gives \( \ce{CH3CH2CH2NH2} \). \( X \) is:

Q5. Which amine does not react with \( \ce{HNO2} \) to form an alcohol?

Q6. Why does aniline not undergo Friedel-Crafts reaction?

Q7. The nitrogen atom in \( \ce{(CH3)2NH} \) has how many sigma bonds?

Q8. Which amine does not react with benzenesulphonyl chloride?

Q9. Which method is used to prepare \( \ce{CH3CH2CH2NH2} \) from \( \ce{CH3CH2CH2Cl} \)?

Q10. The product of aniline with \( \ce{H2SO4} \) at 453-473 K is: