Which of the following compounds expected to be coloured? (a) \( \mathrm{CuF}_{2} \) (b) \( \mat...

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Which of the following compounds expected to be coloured?
(a) \( \mathrm{CuF}_{2} \)
(b) \( \mathrm{CuCl} \)
(c) \( \mathrm{Ag}_{2} \mathrm{SO}_{4} \)
(d) \( \mathrm{MgF}_{2} \)
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