The  complex ion that does not expected to absorb visible light is:

1. [Ni(CN)4]2-

2. [Cr(NH3)6]3+

3. [Fe(H2O)6]2+

4. [Ni(H2O)6]2+

Subtopic:  Organometallic Complexes & their Uses |
 77%
Level 2: 60%+
AIPMT - 2010
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