NEET Amines — Set 19

Question 1

Which amine can donate the most hydrogen bonds per molecule to water?

Accepted Answer

Primary amines like $ \ce{CH3CH2NH2} $ have two N-H bonds to donate and one lone pair to accept, allowing up to two hydrogen bonds donated, as per the PDF’s solubility.

Question 2

Which of the following has the highest solubility in water?

Accepted Answer

Solubility depends on hydrogen bonding with water. $ \ce{CH3NH2} $ (primary amine) forms more hydrogen bonds than $ \ce{(CH3)2NH} $ (secondary) or $ \ce{(CH3)3N} $ (tertiary), and $ \ce{C6H5NH2} $ has lower solubility due to the hydrophobic benzene ring.

Question 3

The strongest base in aqueous solution among the following is:

Accepted Answer

Secondary amines like $ \ce{(CH3CH2)2NH} $ have higher basicity in water due to inductive and solvation effects, surpassing primary and tertiary amines, as per the PDF.

NEET Chemistry: Amines — Practice Set 19

Q1. Which amine can donate the most hydrogen bonds per molecule to water?

Q2. Which of the following has the highest solubility in water?

Q3. The strongest base in aqueous solution among the following is:

Q4. Which amine would form the smallest alcohol when reacted with \( \ce{HNO2} \)?

Q5. The product of the reaction \( \ce{CH3CH2CH2NO2} + \ce{Sn/HCl} \rightarrow \) is:

Q6. The order of reactivity of amines with \( \ce{CH3COCl} \) is:

Q7. Which amine has the highest water solubility among the following?

Q8. The IUPAC name of \( \ce{CH3CH2CH2CH2NH2} \) is:

Q9. The bond angle in trimethylamine is approximately:

Q10. A compound \( X \) on reduction with \( \ce{Sn/HCl} \) gives \( \ce{C6H5CH2NH2} \). \( X \) is: