Exams › JEE Main › Chemistry

Which of the following is not a correct statement for primary aliphatic amines?

1. The intermolecular association in primary amines is less than the intermolecular association in secondary amines.
2. Primary amines on treating with nitrous acid solution form corresponding alcohols except methyl amine.
3. Primary amines are less basic than the secondary amines.
4. Primary amines can be prepared by the Gabriel phthalimide synthesis.

Correct answer: The intermolecular association in primary amines is less than the intermolecular association in secondary amines.

Solution

A primary amine has two N-H bonds available for hydrogen bonding versus one in a secondary amine, so primary amines show greater intermolecular association. Hence the claim that their association is less than that of secondary amines is the incorrect statement.

Related JEE Main Chemistry questions

• In Kjeldahl’s method, the nitrogen present in the sample is determined in the form of:
• What product is formed when benzenediazonium chloride (C6H5N2+Cl−) is treated with CuCl?
• When o-methoxybromobenzene is first reacted with sodamide and then treated with ammonia, which compound is obtained as the final product?
• An organic compound A, when treated with NH3, forms B. On heating, B gives C, and C on treatment with Br2 in the presence of KOH yields ethylamine. The compound A is:
• An organic nitrogen-containing compound gives an oily nitrosoamine when treated with aqueous nitrous acid at low temperature. Which compound is it?
• Which of the following statements are true? (i) In the Sandmeyer reaction, groups such as Cl, Br and CN are introduced into a benzene ring in the presence of Cu+ ions. (ii) In the Gattermann reaction, substitution into the benzene ring occurs in the presence of copper powder and HCl. (iii) The yield obtained in the Gattermann reaction is better than that in the Sandmeyer reaction.

⚔️ Practice JEE Main Chemistry free + battle 1v1 →