MCQ
The correct order of basic strength.


- A$IV>I>II>III$
- B$IV > I > III > II$
- C$III > IV > I > II$
- ✓$IV > III > I > II$

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$(i)\, [CoCl_3 (NH_3)_3]$ $(ii)\, [Co(en)_3]Cl_3$
$(iii)\, [Co(C_2O_4)_2(NH_3)_2]^-$ $(iv)\, [CrCl_2(NH_3)_2(en)]^+$