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प्रश्न
What colour will universal indicator show if you add it to the following substances?
(a) potassium hydroxide, pH = 12
(b) soda water, pH = 5
(c) sulphuric acid, pH = 2
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उत्तर
| SUBSTANCE | COLOUR CHANGE |
| Potassium hydroxide | Dark purple |
| Soda water | Orange yellow |
| Sulphuric acid | Red |
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