`CuSO_(4).5H_(2)O` is blue in colour becauseA. It contains water of crystallization.B. `SO_(4)^(2-)` ions absorbs red light.C. `Cu^(2+)` ion absorb red lightD. `Cu^(2+)` ions absorbs all colours except red from the white light.

`CuSO_(4).5H_(2)O` is blue in colour becauseA. It contains water of cr

1.	`CuSO_(4).5H_(2)O` is blue in colour becauseA. It contains water of crystallization.B. `SO_(4)^(2-)` ions absorbs red light.C. `Cu^(2+)` ion absorb red lightD. `Cu^(2+)` ions absorbs all colours except red from the white light.
Answer» Correct Answer - C `Cu^(2+)` ion `(3d^(9))` absorbs red light from the visible region, for the promotion of `3d` electrons, the ions reflect blue and appear blue.

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`CuSO_(4).5H_(2)O` is blue in colour becauseA. It contains water of crystallization.B. `SO_(4)^(2-)` ions absorbs red light.C. `Cu^(2+)` ion absorb red lightD. `Cu^(2+)` ions absorbs all colours except red from the white light.

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