The tendency of the transition elements to form coloured compounds is attributed to

Why do transition metals form coloured complexes ?

Alloy forming tendency of transition element is due to

Inner transition elements exhibit different coloured compounds on account of unfilled ........Orbitals

Which of the following statement(s) is/are correct? (A) Transition metals and many of their compounds show paramagnetic behaviour. (B) The enthapies of atomisation of the transition metals are high (B) The transition metals generally form coloured compounds (D) Transition metals and their many compounds act as good catalyst.