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Question

59 Which of the following complex ions is expected to absorb visible light? (At.no. Zn = 30, Sc = 21, Ti = 22, Cr = 24) (1) [Ti(en)2(NH3)2]4+ (2) [Cr(NH3)6]3+ (3) [Zn(NH3)6]2+ (4) [Sc(H2O)3(NH3)3]3+

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