Assertion : Lyophilic colloids have a unique property of protecting lyophobic colloids.
Reason : Lyophilic colloids are extensively solvated.

Options

A. If both assertion and reason are true and reason is the correct explanation of assertion.
B. If both assertion and reason are true but reason is not the correct explanation of assertion
C. If assertion is true but reason is false
D. if both assertion and reason are false

Explanation

To solve the question regarding the assertion and reason about lyophilic and lyophobic colloids, we can break it down into clear steps:

### Step 1: Understand the Assertion
The assertion states that "Lyophilic colloids have a unique property of protecting lyophobic colloids."

- **Explanation**: Lyophilic colloids, which are solvent-loving, can stabilize lyophobic colloids (which are solvent-hating) by forming a protective layer around them. This layer prevents direct interaction between the lyophobic colloid and any electrolytes that might cause coagulation.

### Step 2: Evaluate the Reason
The reason provided is that "Lyophilic colloids are extensively solvated."

- **Explanation**: This statement is true. Lyophilic colloids are indeed extensively solvated due to their affinity for the solvent, which allows them to interact favorably with it. This solvation contributes to their stability and ability to protect lyophobic colloids.

### Step 3: Analyze the Relationship
Now, we need to determine if the reason correctly explains the assertion.

- **Explanation**: While both the assertion and reason are true, the reason does not directly explain why lyophilic colloids protect lyophobic colloids. The protection arises from the physical barrier created by the lyophilic colloids, not solely from their solvation properties.

### Conclusion
Both the assertion and reason are correct, but the reason does not provide the correct explanation for the assertion. Therefore, the correct answer is that both the assertion and reason are true, but the reason is not the correct explanation of the assertion.

### Final Answer
Both assertion and reason are true, but the reason is not the correct explanation of the assertion.

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