.[Co(NH 3 ) 3 (NO 2 ) 3 ] does not show any optical isomerism. [Hint. : Due to plane of symmetry.] . Name the central metal atom/ion present in chlorophyll. Name the central metal atom/ion present in Haemoglobin. Name the central metal atom/ion present in vitamin B 12 Hots*.[Ti(H2O)6] Cl 3 is coloured which on heating becomes colourless. Why? [Hint. : H 2 O molecule will be removed.] HotsBoth [Ni(Co) 4 and Ni(CN) 4 ] are diamagnetic. Find the hybridisation of nickel in there complex.
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