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प्रश्न
A solution turns red litmus blue, its pH is likely to be ______.
विकल्प
1
4
5
10
उत्तर
A solution turns red litmus blue, its pH is likely to be 10.
Explanation:
A basic solution turns red litmus blue. On the pH scale, bases have values greater than 7, whereas acids have values less than 7. Therefore, the pH of the given solution is likely to be 10.
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संबंधित प्रश्न
Name the acid-base indicator extracted from lichen.
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Identify the following solutions, whether they are acid or base.
| Solution | Change in Indicator | Acid/Base | ||
| Litmus | Phenolphthalein | Methyl orange | ||
| 1. | -- | No change | -- | |
| 2. | -- | -- | Orange colour turns red | |
| 3. | Red litmus turns blue | -- | -- | |
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| 1. Tamarind | a. Acetic acid |
| 2. Curd | b. Citric acid |
| 3. Lemon | c. Tartaric acid |
| 4. Vinegar | d. Lactic acid |
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| Column 1 | Column II | ||
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| (b) | Calcium hydroxide | (ii) | curd |
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Fill in the crossword given in Figure 5.2 with the help of the clues provided.
Across
(2) The solution which does not change the colour of either red or blue litmus.
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(7) Colour of blue litmus in lemon juice.
Down
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(5) Nature of ant’s sting.
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To Interpret:
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Exlain the following:
\[\ce{H3PO3}\] is not tribasic acid.
