Q. The experimentally observed magnetic moment values, which match well with the spin-only values for the pair of aqueous ions is
(Atomic number: Cr = 24, Co = 27, Gd = 64, Tb = 65, Dy = 66 and Lu = 71)
(A) Cr(III) and Gd(III)
(B) Co(II) and Gd (III)
(C) Cr(III) and Dy(III)
(D) Lu(III) and Tb(III)
Ans: Cr(III) and Gd(III)
![Determine the correctness (or otherwise) of the following Assertion [A] and the Reason [R]](https://www.gkseries.com/blog/wp-content/uploads/2023/10/Determine-the-correctness-or-otherwise-of-the-following-Assertion-A-and-the-Reason-R.jpg)
