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Arrange H(2)O,NH(3) and CH(4) molecules ...

Arrange `H_(2)O,NH_(3)` and `CH_(4)` molecules in decreasing order of bond angle.

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To arrange the molecules \( H_2O \), \( NH_3 \), and \( CH_4 \) in decreasing order of bond angle, we will analyze the molecular geometry and the factors affecting the bond angles in each molecule. ### Step-by-Step Solution: 1. **Identify the Molecular Geometry:** - **Water (\( H_2O \))**: The oxygen atom has two bond pairs (O-H bonds) and two lone pairs. The molecular geometry is bent or angular. - **Ammonia (\( NH_3 \))**: The nitrogen atom has three bond pairs (N-H bonds) and one lone pair. The molecular geometry is trigonal pyramidal. - **Methane (\( CH_4 \))**: The carbon atom has four bond pairs (C-H bonds) and no lone pairs. The molecular geometry is tetrahedral. ...
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