The angle between the covalent bonds is maximum in :

Options

A. `CH_(4)`
B. `BF_(3)`
C. `PF_(3)`
D. `NH_(3)`

Explanation

To determine which molecule has the maximum angle between its covalent bonds, we can analyze the bond angles in several examples. Let's go through the examples step by step.

### Step 1: Analyze CH₄ (Methane)
- **Structure**: Methane has four hydrogen atoms bonded to a central carbon atom.
- **Hybridization**: The hybridization of carbon in CH₄ is sp³.
- **Geometry**: The geometry is tetrahedral.
- **Bond Angle**: The bond angle in CH₄ is approximately 109.5°.

### Step 2: Analyze BF₃ (Boron Trifluoride)
- **Structure**: Boron trifluoride has three fluorine atoms bonded to a central boron atom.
- **Hybridization**: The hybridization of boron in BF₃ is sp².
- **Geometry**: The geometry is trigonal planar.
- **Bond Angle**: The bond angle in BF₃ is approximately 120°.

### Step 3: Analyze NH₃ (Ammonia)
- **Structure**: Ammonia has three hydrogen atoms bonded to a central nitrogen atom, with one lone pair on nitrogen.
- **Hybridization**: The hybridization of nitrogen in NH₃ is sp³.
- **Geometry**: The geometry is trigonal pyramidal due to the presence of a lone pair.
- **Bond Angle**: The bond angle in NH₃ is approximately 107°.

### Step 4: Analyze PF₃ (Phosphorus Trifluoride)
- **Structure**: Phosphorus trifluoride has three fluorine atoms bonded to a central phosphorus atom, with one lone pair on phosphorus.
- **Hybridization**: The hybridization of phosphorus in PF₃ is sp³.
- **Geometry**: The geometry is also trigonal pyramidal due to the presence of a lone pair.
- **Bond Angle**: The bond angle in PF₃ is approximately 91°.

### Conclusion
From the analysis of the bond angles:
- CH₄: 109.5°
- BF₃: 120°
- NH₃: 107°
- PF₃: 91°

The maximum bond angle is found in **BF₃**, which has a bond angle of 120°.

### Final Answer
The angle between the covalent bonds is maximum in **BF₃ (Boron Trifluoride)**.

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