JAMB Biology 2015 Objective — Question 46

Question 46 of 50 from the Joint Admissions and Matriculation Board (JAMB) Biology 2015 Objective paper, with the correct answer and a full explanation.

The colour of phenolphthalein in an alkaline medium is

A. yellow
B. colourless
C. pink/redCorrect
D. orange

Explanation

Phenolphthalein is colourless in acidic/neutral medium but turns pink/red in alkaline medium.

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