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प्रश्न
How does a universal indicator work?
उत्तर
When one or two drops of an acid or a base solution are added to a universal indicator paper, it generates a new colour. By comparing the colour with the pH scale, the pH of the added solution is known. From the pH value, we can identify the strength of the acid or base solution.
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संबंधित प्रश्न
What is an olfactory indicator?
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Lemon juice, Vinegar, Banking soda solution
Give reason for your choice.
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(b) become less than 6
(c) become more than 7
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| A | 1 |
| B | 5 |
| C | 7 |
| D | 11 |
| E | 13 |
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