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Question
Complete the table:
| Indicator | Neutral | Acidic | Alkaline |
| Litmus | Purple | ______ | ______ |
| Phenolphthalein | Colourless | ______ | ______ |
Solution
| Indicator | Neutral | Acidic | Alkaline |
| Litmus | Purple | Blue to Red | Red to Blue |
| Phenolphthalein | Colourless | Colourless | Pink |
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