You are provided with three test tubes A, B and C as shown in Figure 5 – InterviewSolution

1.

You are provided with three test tubes A, B and C as shown in Figure 5.3 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.

Answer»

Test Tube	Effect on blue litmus	Effect on red litmus	Effect on Phenophthalein solution
A	turns red	remains red	colourless
B	remains blue	turns blue	pink colour
C	remains blue	remains red	colourless

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