Question:
Generally, transition elements and their salts are coloured due to the presence
of unpaired electrons in metal ions. Which of the following compounds are
coloured?
(i) KMnO4
(ii) Ce (SO4)2
(iii) TiCl4
(iv) Cu2Cl2
Solution:
Option (i) KMnO4 and (ii) Ce (SO4)2 are the answers.