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QAIPMT-2009-Ch-2138: NEET 2009 Chemistry - Class 12 AIPMT-2009-Ch-2138 Solution: Which of the following complex ions is expected to absorb…

Which of the following complex ions is expected to absorb visible light? (At. nos. Zn = 30, Sc = 21, Ti = 22, Cr = 24)

Multiple Choice Options

  • A [Ti(en)2(NH3)2]4+[Ti(en)_2(NH_3)_2]^{4+}
  • B [Cr(NH3)6]3+[Cr(NH_3)_6]^{3+}
  • C [Zn(NH3)6]2+[Zn(NH_3)_6]^{2+}
  • D [Sc(H2O)3(NH3)3]3+[Sc(H_2O)_3(NH_3)_3]^{3+}

Step-by-Step Verified Solution

In [Cr(NH 3 ) 6 ] 3+ , Cr is present as Cr +3 Cr +3 = [Ar] 3d 3 4s 0 Due to presence of 3 unpaired electrons it absorbs light of visible region.

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