CuSO<sub>4</sub>. 5H<sub>2</sub>O is blue is colour because

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Ram Sharma

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Q. CuSO₄. 5H₂O is blue is colour because

(A) It contains water of crystallization.
(B) SO₄^2- ions absorb red light.
(C) Cu²⁺ ions absorb all colours except red from the white light.
(D) Cu²⁺ ions absorb orange red light.

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✅ Correct Answer: (D) Cu²⁺ ions absorb orange red light.

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