Question

Consider the following statements in respect of lanthanoids.
1. The basic strength of hydroxides of lanthanoids increases from L$a(OH{)}_3$ to $Lu(OH{)}_4$.
2. The lanthanoid ions $L{u}^{3+},Yb62+,C{e}^{4+}$ are diamagnetic.
Which of the statement(s) given above is are correct?

• A. Only 1
• B. Only 2
• C. Both 1 and 2
• D. Neither 1 nor 2

Answer 1

The correct option is A Only 1

Basic strength decreases from $La(OH{)}_3$ to $Cu(OH{)}_4$.

Hence, (1) is incorrect.

The given Ions contain no unpaired electrons and therefore, are diamagnetic.

Hence, (2) is correct.