Advertisements
Advertisements
प्रश्न
You have been provided with three test tubes. One of them contains distilled water and the other two have an acidic solution and a basic solution respectively. If you are given only red litmus paper, how will you identify the contents of each test tube?
उत्तर
- Put red litmus paper in each test tube, turning as needed. A basic solution is one that converts red litmus into blue. The blue litmus paper created can be used to test the acidic solution.
- Put the blue litmus paper in the remaining two test tubes, one at a time. An acidic solution will cause blue litmus paper to turn red.
- Distilled water is the solution that does not affect litmus paper and is considered neutral.
APPEARS IN
संबंधित प्रश्न
Two solutions X and Y have Ph values of 4 and 10 respectively. Which one of these two will give a pink colour with phenolphthalein indicator?
How does tooth enamel get damaged? What should be done to prevent it?
Define an indicator.
Fill in the blank
pH scale was introduced by _________ in 1909.
A is a soluble acidic oxide; B is a soluble base. Compared to the pH of pure water, what is the pH of (a) a solution of A (b) a solution of B.
To increase the pH value of neutral solution, we should add
Write the approximate colour of the following sample with the universal indicator:
Distilled water
When you use universal indicator, you see that solutions of different acids produce different colours. Indeed, solution of the same acid with different concentrations will also give different colours. Why?
A solution has a pH of 7. Explain how you would increase its pH .
What can you say about the pH of a solution that liberates carbon dioxide from sodium carbonate?
