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Post-UTME Chemistry 2009 Objective — Question 16

Question 16 of 16 from the Post-UTME Screening (Post-UTME) Chemistry 2009 Objective paper, with the correct answer and a full explanation.

Phenolphthalein solution at pH 2.5 is

A. yellow
B. Pink
C. red
D. ColourlessCorrect

Explanation

Phenolphthalein is colourless in acidic solutions (below approximately pH 8.2).

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