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Q.

Reena, a student of Class VII want to study the properties of an unknown liquid X. She also found four label, i.e., alcohol, lime water, vinegar and solution of common salt near the liquid. She tested the liquid with phenolphthalein and litmus paper and observed the following results:
I) Phenolphthalein turns bright red
II) Litmus paper turns blue.
Which of the following lables match with the liquid X?

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a

Lime water

b

Vinegar

c

Alcohol

d

Solution of common salt 

answer is B.

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Detailed Solution

Lime water having basic nature. It gives red colour with phenolphthalein, turns red litmus to blue.
 

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