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प्रश्न
Fill in the blank in the following sentences:
Acids have a ..........................taste and they turn..........................litmus to..........................
उत्तर
Acids have a sour taste and they turn blue litmus to red.
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संबंधित प्रश्न
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
- neutral?
- strongly alkaline?
- strongly acidic?
- weakly acidic?
- weakly alkaline?
Arrange the pH in increasing order of hydrogen-ion concentration.
Fresh milk has a pH of 6. When it changes into curd (yogurt), will its pH value increase or decrease? Why?
How does a universal indicator work?
Explain the pH change as the cause of tooth decay. How can tooth decay caused by pH change be prevented?
What would you expect the pH of pure water to be?
A sample of rain water turned universal indicator paper yellow. What would you expect it pH to be? Is it a strong or a weak acid?
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 |
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 |
Methyl orange gives ______ colour in an acidic solution.
Write a note on:
Phenolphthalein
