Which of the following is a common laboratory indicator for bases?
- Methyl orange
-
Phenolphthalein
- Bromothymol blue
- Litmus
The correct answer is: B
Explanation
Phenolphthalein is a common laboratory indicator used to detect the presence of bases in a solution. In its basic form (pH > 8.3), it turns pink or purple, indicating the presence of a base.
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