In a chemical change from PCl3 −−−→PCl5 the hybrid state of P changes from

Q. In a chemical change from PCl3 −−−→PCl5 the hybrid state of P changes from:

1. sp2 to sp3
2. sp3 to sp2
3. sp3 to sp3d
4. sp3 to dsp

Answer: sp3 to sp3d