Two solutions 'A', 'B' and 'C' having pH 2, 9 and 11. Which solution will give no colour with Phenolphthalein indicator ?

Options

A. A
B. B
C. C
D. None of these

Explanation

To determine which solution will give no color with the Phenolphthalein indicator, we need to analyze the pH values of the solutions provided:

1. **Identify the pH values of the solutions:**
- Solution A: pH 2
- Solution B: pH 9
- Solution C: pH 11

2. **Understand the behavior of Phenolphthalein:**
- Phenolphthalein is an acid-base indicator that is colorless in acidic solutions (pH < 7) and turns pink in basic solutions (pH > 7).
- At a neutral pH of 7, Phenolphthalein remains colorless.

3. **Classify the solutions based on their pH:**
- Solution A (pH 2) is acidic (pH < 7).
- Solution B (pH 9) is basic (pH > 7).
- Solution C (pH 11) is also basic (pH > 7).

4. **Determine which solution will show no color with Phenolphthalein:**
- Since Phenolphthalein is colorless in acidic solutions, Solution A (pH 2) will give no color with the indicator.
- Solutions B and C, being basic, will show a pink color with Phenolphthalein.

5. **Conclusion:**
- The solution that will give no color with Phenolphthalein is Solution A (pH 2).

### Final Answer:
Solution A (pH 2) will give no color with Phenolphthalein indicator.

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