Assertio:`pK_a` value of phenol is 10.0 while that of ethanol is 15.9
Reason : Ethanol is stronger acid than phenol.

Options

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

Explanation

To solve the problem, we need to analyze the assertion and the reason provided regarding the acidity of phenol and ethanol based on their pKa values.

### Step 1: Understand pKa Values
The pKa value is a measure of the acidity of a compound. A lower pKa value indicates a stronger acid, while a higher pKa value indicates a weaker acid.

### Step 2: Compare the pKa Values
- The pKa of phenol is given as 10.0.
- The pKa of ethanol is given as 15.9.

Since 10.0 is less than 15.9, this indicates that phenol is a stronger acid than ethanol.

### Step 3: Analyze the Assertion
The assertion states that the pKa value of phenol is 10.0 while that of ethanol is 15.9. This part of the statement is true.

### Step 4: Analyze the Reason
The reason states that ethanol is a stronger acid than phenol. Since we have established that phenol has a lower pKa value than ethanol, this statement is false.

### Conclusion
- The assertion is true: the pKa values are correctly stated.
- The reason is false: ethanol is not a stronger acid than phenol.

### Final Answer
- Assertion: True
- Reason: False

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