In which of the following combination hybridisation of central atom (*) does not change?

CHEMISTRY · Single correct · A Level · Chemistry · Bonding · Bonding

Problem

In which of the following combination hybridisation of central atom (*) does not change? (1)

\text{H}_2\text{O} + \dot{\text{C}}\text{O}_2

(2)

\text{H}_3\dot{\text{B}}\text{O}_3 + \text{OH}^-

(3)

\text{BF}_3 + \dot{\text{N}}\text{H}_3

(4) None of these