Question
What is a litmus paper? What would happen when a red litmus paper is treated with a solution containing NaOH? [2 MARKS]
Answer: Option A
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Litmus paper: 1 Mark
Explanation: 1 Mark
Litmus paper is an indicator. It is used to check whether a solution is acidic or basic.
When treated with a solution containing NaOH, the color of red litmus paper will change to blue as NaOH is a base and bases turn red litmus blue.
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