Question

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 1

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