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प्रश्न
State whether the following statement is true or false. Correct the false statement.
Phenolphthalein is a natural indicator.
पर्याय
True
False
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उत्तर
This statement is False.
Explanation:
Phenolphthalein is a synthetic indicator.
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संबंधित प्रश्न
What colour does the following indicator turn when added to a base or alkali (such as sodium hydroxide)?
Litmus
What colour does the following indicator turn when added to an acid (such as hydrochloric acid)?
Litmus
Why should curd and other sour foodstuffs (like lemon juice, etc.) not be kept in metal containers (such as copper and brass vessels)?
A beaker of concentrated hydrochloric acid has a pH of 1. What colour will full range universal indicator turn if it is added to this beaker? Is it a strong or a weak acid?
Two drinks P and Q gave acidic and alkaline reactions, respectively. One has a pH value of 9 and the other has a pH value of 3. Which drink has the pH value of 9?
The pH values of five solutions A, B, C, D and E are given below:
| A | 1 |
| B | 5 |
| C | 7 |
| D | 11 |
| E | 13 |
Which solution is
- weakly alkaline
- neutral
- strongly acidic
- strongly alkaline, and
- weakly acidic?
Turmeric is used as a _______.
Turmeric and litmus are ______ acid-base indicators.
Which of the following is not a natural indicator?
Write a note on:
Litmus
