What is litmus solution?

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Solution

Litmus solution is a type of dye which acts as an indicator for acidic and basic solutions. It is naturally purple in colour but with acids, it turns red and with bases, it turns blue. It is extracted from Lichen.

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Name the source from which litmus solution is obtained. What is the use of this solution?

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What is observed when neutral litmus solution is added to sodium hydrogen carbonate solution?

What happens when?

a) A solution of calcium hydroxide is added to red litmus paper

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State what do you observe when:

Neutral litmus solution is added to alkaline solution.

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