Question

If a molecule $MX_3$, has zero dipole moment, the sigma bonding orbitals used by M (atomic number < 21) are

• A. pure p
• B. sp-hybridised
• C. $sp^2$-hybridised
• D. $sp^3$-hybridised

Answer 1

Answer: (C)

$sp^2$-hybridised

Answer 2

For non-polar $MX_3$, it must have triangular planar
arrangement, i.e. there should be $sp^2$-hybridisation
around M.