NEET Chemistry Chemical Reactions MCQ Question
A diagram shows the intermolecular hydrogen bonding present in a primary amine. Which of the following best explains why primary amines have higher boiling points compared to tertiary amines of similar molar mass?
Primary amines form strong intermolecular hydrogen bonds, increasing their boiling points.
Tertiary amines can form stronger hydrogen bonds than primary amines.
Tertiary amines have more nitrogen atoms than primary amines, increasing boiling points.
Primary amines have fewer unshared pairs of electrons than tertiary amines.
Correct Answer
Detailed Explanation
The presence of intermolecular hydrogen bonding in primary amines, as shown in Fig. 9.2, leads to higher boiling points compared to tertiary amines, which cannot form such bonds due to the lack of hydrogen atoms attached to the nitrogen.
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