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Question
Hibiscus flower is an example for natural indicator.
Options
True
False
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Solution
Hibiscus flower is an example for natural indicator- True.
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RELATED QUESTIONS
Five solutions, A, B, C, D and E, when tested with universal indicator, showed pH as 4, 1, 11, 7 and 9, respectively. Which solution is
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Litmus
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Here are some results of solutions tested with universal indicator paper:
| Sulphuric acid | : | Red |
| Metal polish | : | Dark blue |
| Washing-up liquid | : | Yellow |
| Milk of magnesia | : | Light blue |
| Oven cleaner | : | Purple |
| Car battery acid | : | Pink |
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A group of students measured the pH of some substances they found in their homes. Their results are given in the following table:
| Substance | pH | Substance | pH |
| Apples | 3.0 | Salt | 7.0 |
| Baking soda | 8.5 | Sugar | 7.0 |
| Black coffee | 5.0 | Toothpaste | 9.0 |
| Household ammonia | 12.0 | Vinegar | 3.0 |
| Lemon juice | 2.5 | Washing soda | 11.5 |
| Milk | 6.5 |
- What would the students have used to measure the pH?
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- Which solution can be used to treat wasp stings?
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Turmeric is used as a _______.
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Write a note on:
Phenolphthalein
