Account for the following.

a) The transition metals generally form coloured compounds.

b) Transition metals act as good catalyst.

c) Transition metals form alloys.

Give reasons for the following.

  (a)  Transition elements have variable oxidation state

  (b) The aqueous solution of Cu⁺ is not stable

The atomic and ionic radii of third transition series of elements show regular decrease with increasing atomic number.

(a) Name this phenomenon

(b) Explain the reason for this phenomenon and write any two consequences of it.

The outer electronic configuration of Au is 5s²5p⁶5d¹⁰6s¹  and  that of Zn is 3s² 3p⁶3d¹⁰4s²  

                (a)  Write the outer electronic  configuration of Au²⁺ and Zn²⁺ ions

                (b) Explain why Au is considered as a transition element but Zn is not