On the basis of VSEPR theory, predict the shapes of the following :
`(i) CIF_(3) (ii) BrF_(5) (iii) NH_(2)^(-) (iv) H_(3) O^(+)`

Explanation

To predict the shapes of the given molecules based on VSEPR (Valence Shell Electron Pair Repulsion) theory, we will follow these steps for each molecule:

### (i) CIF₃ (Chlorine Trifluoride)

1. **Determine the central atom**: Chlorine (Cl) is the central atom.
2. **Count valence electrons**: Chlorine has 7 valence electrons, and each fluorine (F) has 7 valence electrons. Thus, CIF₃ has:
- Total = 7 (Cl) + 3 × 7 (F) = 28 valence electrons.
3. **Draw the Lewis structure**: Chlorine forms three single bonds with three fluorine atoms. This uses 6 electrons (3 bonds), leaving 2 lone pairs on chlorine.
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