What colour does blue litmus paper turn when dipped into an aqueous acidic solution such as dilute hydrochloric acid?
Answer and explanation
Correct answer: B. Red
- Step 1: Litmus is a natural acid-base indicator derived from lichens. Step 2. Acids turn moist blue litmus paper red, while bases turn red litmus paper blue. Answer: Red. Why not the others: Blue is its alkaline colour; yellow is for methyl orange in alkali; colourless is for phenolphthalein in acid.
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