You are provided with three test tubes A, B and C as shown in figure with different liquids. What will you observe when you put
(a) a piece of blue litmus paper in each test tube
(b) a piece of red litmus paper in each test tube
(c) a few drops of phenolphthalein solution to each test tube?

AcademicChemistryNCERTClass 7


Test tube
Effect on blue litmus paper
Effect on red litmus paper
Effect on phenol­phthalein solution
A
turns red
no change
colourless
B
no change
turns blue
turns pink
C
no change
no change
colourless
raja
Updated on 10-Oct-2022 13:21:30

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