Transition and InnerTransition Elements - Result Question 34

35. Which of the following compounds is expected to be coloured?

(1997, 1M)

(a) $Ag _2 SO _4$

(b) $CuF _2$

(c) $MgF _2$

(d) $CuCl$

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Answer:

Correct Answer: 35. (b)

Solution:

$Cu^{2+}\left(3 d^{9}\right)$ undergo $d-d$ transition, exhibit colour.