Question

In amines, the nitrogen atom is A and B hybridised, making geometry of amines as C. Then A, B, and C respectively are:

• A. trivalent, sp$^2$, trigonal
• B. tetravalent, sp$^3$, tetrahedral
• C. trivalent, sp$^3$, pyramidal
• D. tetravalent, sp$^2$, pyramidal

Hint:

Amines typically have sp$^3$ hybridized nitrogen atoms, and their geometry is pyramidal due to the lone pair of electrons on nitrogen, which repels the bonding pairs.

Answer 1

The Correct Option is C

In amines, the nitrogen atom typically has three single bonds to other atoms (two hydrogens and one alkyl or aryl group), and it has a lone pair of electrons. This gives the nitrogen a trivalent state, where it is sp$^3$ hybridised. The geometry of the amines is pyramidal, as the lone pair of electrons creates repulsion and results in a tetrahedral-like structure with one position occupied by the lone pair.
Thus, the correct answer is trivalent, sp$^3$, pyramidal.