What is the effect of potassium hydroxide solution on litmus paper?

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Solution

Litmus paper is an indicator which is used to test if a substance is acidic or basic in nature. Acid turns blue litmus paper red and base turns red litmus paper blue.
Potassium hydroxide \((\text{KOH})\) is a base. Therefore, it turns red litmus paper blue.

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A Drop of colourless liquid was placed on blue litmus paper. The litmus paper turned red. The liquid could be :
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What is the effect of potassium hydroxide solution on litmus paper?

Litmus paper is an indicator which is used to test if a substance is acidic or basic in nature. Acid turns blue litmus paper red and base turns red litmus paper blue. Potassium hydroxide \((\text{KOH})\) is a base. Therefore, it turns red litmus paper blue.

Litmus paper is an indicator which is used to test if a substance is acidic or basic in nature. Acid turns blue litmus paper red and base turns red litmus paper blue.
Potassium hydroxide \((\text{KOH})\) is a base. Therefore, it turns red litmus paper blue.