Blue litmus turns red when added to a/an:

acid

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base

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oil

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none of the above

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Solution

The correct option is B acid
Acids have a property to turn the blue litmus paper red but it does not have any effect on the red litmus paper.
This is due to it's acidic nature.
Hence, the correct answer is option (A).

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Blue litmus turns red when added to a/an:

The correct option is B acidAcids have a property to turn the blue litmus paper red but it does not have any effect on the red litmus paper.This is due to it's acidic nature.Hence, the correct answer is option (A).

The correct option is B acid
Acids have a property to turn the blue litmus paper red but it does not have any effect on the red litmus paper.
This is due to it's acidic nature.
Hence, the correct answer is option (A).