Transition and InnerTransition Elements - Result Question 48

####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:

  1. $Co^{2+}\left(3 d^{7}\right)$ and $Cr^{3+}\left(3 d^{3}\right)$ have allowed $d-d$ transition, therefore produces coloured aqueous solution.


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