Question

Consider the following statements i) Lu(OH)3 is the least basic among hydroxides of lanthanides ii) Eu+2 is a good reducing agent in solution iii) lanthanides have high densities iv) Ce4+ can act as a reducing agent is solution Which of the above is/are true?​

Answer 1

Answer:

1. La(OH)3 is least basic among hydroxides of lanthanides. II. Zr4+ and Hf4+ possess almost the same ionic radii.
2. Eu2+ is a strong reducing agent because Eu3+ is more stable than Eu2+. ... Hence after the removal of 2 electrons it achieves stable half filled electronic configuration acting as a strong reducing agent.
3. Physical Properties of Lanthanides. density increases, with an increasing atomic number along the period. They have a high density ranging between 6.77 to 9.74 g cm-3. It increases with increasing atomic number.
4. Your 4 answer in attachment