MEDIUMMCQ SINGLEJEE Advanced ChemistryInorganic ChemistryCoordination compoundsPrevious Year Questions

The effective atomic number of Cr (atomic no. 24) in [Cr(NH3)6]Cl3 is [Manipal 2010]

A.35

B.27

C.33✓ Correct

D.36

Explanation

Effective atomic number = atomic number of the metal- number of electrons lost during the formation of the metal ion from its atom+ number of electrons donated by the ligands. The atomic number of chromium is 24. Effective atomic number = 24 – 3 + 12 = 33 COORDINATION COMPOUNDS 28

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