Which of the following is a common laboratory indicator for bases?
A.
Methyl orange
B.
Phenolphthalein
C.
Bromothymol blue
D.
Litmus
Correct Answer: Option 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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