| Test tube | Effect on blue litmus | Effect on red litmus | Effect on phenophthalein solution |
| A | Turns red | Colourless | Colourless |
| B | Remains blue | Turns blue | Pink colour |
| C | Remains blue | Remains red | Colourless |
Question
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?
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