Which of the following is non polar species.

Options

A. `SO_(2)`
B. `CO_(2)`
C. `H_(2)O`
D. `NH_(3)`

Explanation

To determine which of the following species is non-polar, we need to analyze the molecular geometry and electronegativity of the atoms involved in each species.

### Step-by-Step Solution:

1. **Understanding Polarity**:
- Polarity in a molecule arises when there is a difference in electronegativity between the bonded atoms, leading to a dipole moment. A non-polar molecule has an even distribution of charge, resulting in no net dipole moment.

2. **Analyzing SO2 (Sulfur Dioxide)**:
- SO2 has a bent shape due to the presence of a lone pair on the sulfur atom. The oxygen atoms are more electronegative than sulfur, creating a dipole moment towards the oxygen atoms. Therefore, SO2 is a polar molecule.

3. **Analyzing CO2 (Carbon Dioxide)**:
- CO2 has a linear structure with two oxygen atoms bonded to a central carbon atom. The electronegativity difference between carbon and oxygen creates dipoles pointing towards the oxygen atoms. However, because the molecule is linear, these dipoles cancel each other out, resulting in a net dipole moment of zero. Thus, CO2 is a non-polar molecule.

4. **Analyzing H2O (Water)**:
- H2O has a bent shape due to two lone pairs on the oxygen atom. The oxygen is more electronegative than hydrogen, leading to a dipole moment directed towards the oxygen. Therefore, H2O is a polar molecule.

5. **Analyzing NH3 (Ammonia)**:
- NH3 has a trigonal pyramidal shape due to one lone pair on the nitrogen atom. The nitrogen is more electronegative than hydrogen, creating a dipole moment directed towards nitrogen. Thus, NH3 is also a polar molecule.

6. **Conclusion**:
- Among the given species, CO2 is the only non-polar molecule because the dipole moments cancel each other out due to its linear geometry.

### Final Answer:
The non-polar species is **CO2**.