Which indicator is yellow in acid, green in neutral solution and blue in alkali?
Answer and explanation
Correct answer: C. Bromothymol blue
- Step 1: Bromothymol blue is yellow in acid, green in neutral solution and blue in alkali. Answer: Bromothymol blue. Why not the others: Methyl orange is red in acid and yellow in alkali, phenolphthalein is colourless in acid and pink in alkali, and litmus is red in acid and blue in alkali.
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