Transition and InnerTransition Elements - Result Question 149
####49. The aqueous solution of the following salts will be coloured in case of
(1990, 1M)
(a) $Zn\left(NO _3\right) _2$
(b) $LiNO _3$
(c) $Co\left(NO _3\right) _2$
(d) $CrCl _3$ (e) potash alum
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Answer:
Correct Answer: 49. (c, d)
Solution:
- $Co^{2+}\left(3 d^{7}\right)$ and $Cr^{3+}\left(3 d^{3}\right)$ have allowed $d-d$ transition, therefore produces coloured aqueous solution.
