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