Assertion :-`CO_(2)` molecules is non-polar while `SO_(2)`
is polar Reason : - Carbon atom is smaller than sulphur.

Options

A. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.
B. If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion.
C. If Assertion is True, but the Reason is False.
D. If both Assertion & Reason are false

Answer

To solve the question regarding the assertion and reason provided, we will analyze both the assertion and the reason step by step.

### Step 1: Analyze the Assertion
The assertion states that CO₂ (carbon dioxide) is non-polar while SO₂ (sulfur dioxide) is polar.

- **CO₂ Structure**: Carbon dioxide has a linear structure (O=C=O). The two oxygen atoms are symmetrically placed around the carbon atom.
- **Electronegativity**: Oxygen is more electronegative than carbon, creating dipole moments directed towards each oxygen atom. However, due to the linear arrangement, these dipole moments cancel each other out, resulting in a net dipole moment of zero.
- **Conclusion**: Since the dipole moment is zero, CO₂ is indeed a non-polar molecule.

### Step 2: Analyze the Reason
The reason states that the carbon atom is smaller than the sulfur atom.

- **Size Comparison**: Carbon (atomic number 6) is indeed smaller than sulfur (atomic number 16) in terms of atomic radius.
- **Relevance to Polarity**: While the size of the atom can influence the bond lengths and the overall molecular geometry, it does not directly explain why CO₂ is non-polar and SO₂ is polar. The polarity is more related to the molecular geometry and the presence of lone pairs rather than just the size of the atoms involved.

### Step 3: Analyze SO₂
- **SO₂ Structure**: Sulfur dioxide has a bent shape due to the presence of a lone pair of electrons on the sulfur atom.
- **Dipole Moments**: The dipole moments from the two S=O bonds do not cancel out due to the bent shape, resulting in a net dipole moment. Therefore, SO₂ is a polar molecule.

### Final Conclusion
- **Assertion**: True (CO₂ is non-polar, SO₂ is polar).
- **Reason**: True (carbon is smaller than sulfur), but it does not correctly explain the assertion.

### Overall Answer
The assertion is true, and the reason is also true, but it is not a correct explanation for the assertion. Therefore, the correct answer is that both the assertion and reason are true, but the reason is not a correct explanation for the assertion.