A solution gives the following colours with different indicators:
a. Methy`1` orange `rArr` Yellow
b. Methy`1` red `rArr` Yellow
c. Bromothymol blue `rArr` Orange
What is the `pH` of the solution?

Options

A. `gt 4.5`
B. `gt 6.0`
C. 6.0 to 6.3
D. 4.5 to 6

Answer

To determine the pH of the solution based on the colors observed with different indicators, we will analyze each indicator's color change and the corresponding pH range.

### Step-by-Step Solution:

1. **Analyze Methyl Orange:**
- Methyl orange turns yellow when the pH is greater than 4.5.
- Therefore, from this observation, we can conclude that the pH of the solution is greater than 4.5.

2. **Analyze Methyl Red:**
- Methyl red turns yellow when the pH is greater than 6.
- Thus, this indicates that the pH of the solution is also greater than 6.

3. **Analyze Bromothymol Blue:**
- Bromothymol blue turns orange when the pH is less than 6.3.
- This means that the pH of the solution must be less than 6.3.

4. **Combine the Findings:**
- From the analysis of methyl orange and methyl red, we have:
- pH > 4.5 (from methyl orange)
- pH > 6 (from methyl red)
- From the analysis of bromothymol blue, we have:
- pH < 6.3 (from bromothymol blue)
- Combining these results, we conclude that:
- 6 < pH < 6.3

5. **Final Conclusion:**
- The pH of the solution lies between 6 and 6.3.

### Answer:
The pH of the solution is between 6 and 6.3.

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