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Arrange the following in order of decrea...

Arrange the following in order of decreasing bond angles
`(i) CH_(4), NH_(3), H_(2)O, BF_(3), C_(2)H_(2)" "(ii) NH_(3), NH_(2)^(-), NH_(4)^(+)`

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To solve the problem of arranging the given molecules in order of decreasing bond angles, we will analyze each molecule's structure and the factors affecting bond angles. ### Part (i): Arranging CH₄, NH₃, H₂O, BF₃, C₂H₂ 1. **CH₄ (Methane)**: - **Valence Electrons**: Carbon (4) + 4 Hydrogens (1 each) = 8 electrons. - **Bond Pairs**: 4 (C-H bonds). - **Lone Pairs**: 0. ...
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