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प्रश्न
What happens during a wasp sting? What is its remedy?
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उत्तर
When a wasp stings a person, it inserts an alkaline solution into the person’s skin. This causes severe pain and irritation. The remedy is to apply a weak acid, such as vinegar, to the wound. The acid neutralises the alkaline solution and soothes the pain.
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संबंधित प्रश्न
Write a balanced chemical equation for the reaction of sodium hydroxide solution with iron (III) chloride solution
Name an indicator which is pink in alkaline solution but turns colourless in acidic solution.
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- What are X, Y and Z?
- Write equations for the reactions which take place:
- When limestone reacts with dilute HCl.
- When gas X reacts with lime water to form white precipitate Y.
- When excess of gas X dissolves white precipitate Y to form a soluble compound Z.
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Name an acid used to flavor and preserve food.
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\[\ce{Acid + sulphide -> Salt + Hydrogen sulphide}\]
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Solution A is strong acid B weak acid C strong alkali.
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The correct way of making a solution of acid in water is to ______.
Lemon juice and vinegar taste ______ because they contain ______.
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Match the following:
| 1. | The hardest substance in our body | a. | Aluminum phosphate |
| 2. | Citrus fruits | b. | Potash alum |
| 3. | Rice plant | c. | Insoluble in water |
| 4. | Double salts | d. | Acidic soil |
| 5. | Silver chloride | e. | Calcium phosphate |
| f. | Alkaline soil |
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Classify these solutions as neutral, slightly or strongly acidic and slightly or strongly alkaline.
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