Correct statement (s) regarding `As(CH_(3))F_(2)Cl_(2)` molecule is/are:

Options

A. Maximum three halogen atoms can lie in same plane
B. Both axial and equatorial plane may have equal number of atoms
C. `As-Cl` bond length is longer than `As-F` bond length .
D. Maximum five atoms can lie in equatorial plane.

Explanation

To analyze the molecule As(CH₃)F₂Cl₂ and determine the correctness of the statements regarding it, we will follow these steps:

### Step 1: Determine the Valence Electrons
Arsenic (As) has 5 valence electrons. The other atoms contribute as follows:
- Carbon (C) in CH₃ contributes 4 electrons (1 for each H and 3 for C).
- Each Fluorine (F) contributes 1 electron (2 total for F₂).
- Each Chlorine (Cl) contributes 1 electron (2 total for Cl₂).

Total valence electrons = 5 (As) + 4 (C) + 2 (F) + 2 (Cl) = 13 valence electrons.

### Step 2: Draw the Lewis Structure
1. Place As at the center.
2. Attach the CH₃ group, two F atoms, and two Cl atoms around As.
3. The arrangement will be trigonal bipyramidal, with the CH₃ group in the equatorial position.

### Step 3: Analyze the Statements
1. **Statement 1**: Maximum 3 halogen atoms can lie in the same plane.
- **Analysis**: In the trigonal bipyramidal structure, the equatorial plane can accommodate 3 atoms. Therefore, this statement is **true**.

2. **Statement 2**: Both axial and equatorial planes may have equal numbers of atoms.
- **Analysis**: The equatorial plane has 3 atoms (2 Cl and 1 CH₃) and the axial plane has 2 atoms (2 F). Thus, this statement is **false**.

3. **Statement 3**: As-Cl bond length is longer than As-F bond length.
- **Analysis**: Chlorine is larger than fluorine, leading to a longer bond length for As-Cl compared to As-F. Therefore, this statement is **true**.

4. **Statement 4**: Maximum 5 atoms can lie in the equatorial plane.
- **Analysis**: In the equatorial plane, we can only fit 3 atoms (2 Cl and 1 CH₃) due to the geometry. Therefore, this statement is **false**.

### Conclusion
The correct statements regarding the As(CH₃)F₂Cl₂ molecule are:
- Statement 1: True
- Statement 2: False
- Statement 3: True
- Statement 4: False

Thus, the correct statements are 1 and 3.

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