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

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

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