Question

What happens when-
a. a red litmus paper is dipped in curd.
b. a red litmus paper is dipped in soap solution.
C. a blue litmus paper is dipped in lemon juice.
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Answer 1

Answer:

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• When red litmus paper is dipped in curd it's colour remains as it is because curd is acidic in nature.
• when red litmus paper is dipped in soap solution then the litmus paper changes to blue because soap solution is basic in nature.
• when a blue litmus paper is dipped in lemon then the litmus paper will turn red because lemon juice is acidic in nature .

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Answer 2

a. Curd contains lactic acid and hence turns red litmus paper to blue.

b.Soap solution is basic in nature hence it turns red litmus paper to blue.

c.If you dip blue litmus paper into lemon juice, it turns red. If you dip it into soapy water, it turns blue. Because lemon juice is acidic, it makes blue litmus paper turn red. Because soapy water is alkaline, it turns red litmus paper blue.