Match the entries of column I with appropriate entries of column II and choose the correct option out of the four options given.
| Column I (Property) | Column II (Element) |
| (i) Lanthanoid which shows +4 oxidation state | (a) Pm |
| (ii) Lanthanoid which can show +2 oxidation state | (b) Ce |
| (iii) Radioactive lanthanoid | (c) Lu |
| (iv) Lanthanoid which has 4f14 electronic configuration in +3 oxidation state. | (d) Eu |
Answer & explanation
Correct answer: option 4
(i) Lanthanoid which shows +4 oxidation state is Ce.
(ii) Lanthanoid which can show +2 oxidation state is Eu.
(iii) Radioactive lanthanoid is Pm.
(iv) Lanthanoid which has 4f14 electronic configuration in +3 oxidation state is Lu.
