The correct sequence of polarity of the following molecule
(1) Benzene (2)Inorganic Benzene (3) `PCl_(3)F_(2)` (4)`PCl_(2)F_(3)`

Explanation

To determine the correct sequence of polarity for the given molecules (1) Benzene, (2) Inorganic Benzene, (3) PCl3F2, and (4) PCl2F3, we will analyze each molecule based on its structure and dipole moment.

### Step 1: Analyze Benzene
- **Structure**: Benzene (C6H6) has a planar, symmetrical structure with alternating double bonds.
- **Polarity**: The dipole moments of the C-H bonds are equal and opposite, canceling each other out due to symmetry.
- **Conclusion**: Benzene is a **non-polar** molecule.

### Step 2: Analyze Inorganic Benzene
- **Structure**: Inorganic Benzene (B3N3H6) has a structure similar to benzene, with boron and nitrogen atoms.
- **Polarity**: The molecule is also symmetrical, with dipole moments from B-H and N-H bonds that cancel each other out.
- **Conclusion**: Inorganic Benzene is also a **non-polar** molecule.

### Step 3: Analyze PCl3F2
- **Structure**: PCl3F2 has a trigonal bipyramidal geometry.
- **Polarity**: The two fluorine atoms occupy axial positions, and the three chlorine atoms occupy equatorial positions. The dipole moments of the fluorine atoms cancel each other, but the dipole moments from the chlorines do not cancel due to differing electronegativities.
- **Conclusion**: PCl3F2 has a **net dipole moment** and is therefore **polar**.

### Step 4: Analyze PCl2F3
- **Structure**: PCl2F3 also has a trigonal bipyramidal geometry.
- **Polarity**: The three fluorine atoms occupy axial positions, and the two chlorine atoms occupy equatorial positions. The dipole moments from the fluorines do not cancel due to the presence of chlorine, leading to a net dipole moment.
- **Conclusion**: PCl2F3 is also **polar**.

### Step 5: Determine the Correct Sequence of Polarity
Now that we have analyzed the polarity of each molecule, we can summarize:
1. **Benzene** - Non-polar
2. **Inorganic Benzene** - Non-polar
3. **PCl3F2** - Polar
4. **PCl2F3** - Polar

Since both benzene and inorganic benzene are non-polar, they will be grouped together, followed by the polar molecules. The correct sequence of polarity from non-polar to polar is:
- **Benzene = Inorganic Benzene < PCl3F2 < PCl2F3**

### Final Sequence
1. Benzene (Non-polar)
2. Inorganic Benzene (Non-polar)
3. PCl3F2 (Polar)
4. PCl2F3 (Polar)