Assertion : `CO_2` is a Lewis Acid.
Reason: It can accept a proton.

Options

A. Assertion and reason both are correct statements and Reason is correct explanation for assertion.
B. Assertion and reason both are correct statement but reason is not correct explanation for assertion
C. Assertion is correct statement but reason is wrong statement.
D. Assertion is wrong statement but reason is correct statement

Answer

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

**Step 1: Understanding the Assertion**
- The assertion states that CO₂ is a Lewis acid.
- A Lewis acid is defined as a substance that can accept an electron pair.

**Step 2: Analyzing CO₂ Structure**
- The molecular structure of CO₂ is linear, with a carbon atom double bonded to two oxygen atoms (O=C=O).
- In this structure, the carbon atom has a partial positive charge due to the higher electronegativity of oxygen, which attracts the electron density towards itself.

**Step 3: Determining if CO₂ can act as a Lewis Acid**
- Since the carbon atom in CO₂ has a partial positive charge, it can accept electron pairs from Lewis bases (electron pair donors).
- Therefore, CO₂ can indeed act as a Lewis acid because it can accept electron pairs.

**Step 4: Understanding the Reason**
- The reason states that CO₂ can accept a proton (H⁺).
- However, accepting a proton is not the definition of a Lewis acid; it is more aligned with the Brønsted-Lowry acid definition.

**Step 5: Conclusion**
- The assertion that CO₂ is a Lewis acid is correct.
- The reason that it can accept a proton is incorrect in the context of Lewis acid-base theory.
- Therefore, the correct answer is that the assertion is true, but the reason is false.

**Final Answer:**
- The correct option is C: Assertion is true, but Reason is false.

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