Question

Transition metals are characterised by the properties:

• A. variable valency and tendency to form complex
• B. coloured compounds
• C. high melting and boiling points
• D. all of the above

Answer 1

The correct option is D all of the above

Transition metals:.

Due to empty $d$-orbitals, they show variable valency and form complexes.

And due to unpaired electron, they show colour and paramagnetism.

Also, due to higher valency, they show high melting and boiling point.

Hence, the correct option is $\text{D}$