Question

In $B{X}_3$, B is

• A.
• B.
• C.
• D.

Answer 1

The correct option is C

The electronic configuration of boron is $\left[He\right]2s^{2}s{p}^1$. One of the 2s electron jumps to the p orbital to form $\left[He\right]2s^{1}2p{x}^{1}2p{y}^1$ . Thus it undergoes $s{p}^2$ hybridisation to give 3 orbitals for the bond formation with 3 halide atoms.