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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
You have two solutions, A and B. The pH of solution A is 6 and pH of solution B is 8. Which solution has more hydrogen ion concentration? Which of this is acidic and which one is basic?
Fill in the following blank with suitable words:
Neutral substances have a pH of ................
Fill in the following blank with suitable words:
The more acidic a solution, the ................. the pH.
What is a universal indicator? For what purpose is it used?
Explain how pH change in the lake water can endanger the lives of aquatic animals (like fish). What can be done to lessen the danger to the lives of aquatic animals in the lake?
Separate the following into substances having pH values above and below 7. How do these influence litmus paper?
(i) Lemon juice
(ii) Solution of washing soda
(iii) Toothpaste
(iv) Vinegar
(v) Stomach juices
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 |
Solution A turns universal indicator blue to purple whereas solution B turns universal indicator orange to red.
Name any two substances which can give solutions like B.
The salt whose aqueous solution will turn blue litmus to red is:
(a) ammonium sulphate
(b) sodium acetate
(c) sodium chloride
(d) potassium carbonate
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