MCQ
Secondary nitro compounds when react with $HN{O_2}$ forms crystalline solids which one on treatment with $NaOH $ gives
- ARed solution
- ✓Blue solution
- CWhite precipitate
- DYellow colouration
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$(i)$ $Co^{3+}$ (Octahedral complex with a strong field ligand)
$(ii)$ $Co^{3+}$ (Octahedral complex with a weak field ligand like $F^-$ )
$(iii)$ $Co^{2+}$ (Tetrahedral complex)
$(iv)$ $Co^{2+}$ (Square planar complex)