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प्रश्न
What happens during a bee sting? What is its remedy?
उत्तर
When a bee stings a person, it injects an acidic solution into the person’s skin. This causes severe pain and irritation. The remedy is to apply a baking soda solution (sodium hydrogen carbonate solution, which is a base). The solution soothes the pain by neutralising the acid.
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संबंधित प्रश्न
What colour does phenolphthalein indicator turn when added to an alkali (such as sodium hydroxide)?
Which chemical is injected into the skin of a person during the nettle leaf hair sting?
How can the effect of these stings be neutralised?
The soil in a field in highly acidic. Name two materials which can be added to this soil to reduce its acidity. Give the reason for your choice.
What type of ions is formed when an acid is dissolved in water?
Since metal carbonate and metal bicarbonate are basic, they react with acids to give salt and water with the liberation of ______.
Match the chemical substances given in Column (A) with their appropriate application given in Column (B)
| Column (A) |
Column (B) |
| (A) Bleaching powder | (i) Preparation of glass |
| (B) Baking soda | (ii) Production of H2 and Cl2 |
| (C) Washing Soda | (iii) Decolourisation |
| (D) Sodium chloride | (iv) Antacid |
Hydrochloric Acid reacts with metal bicarbonates to give ______.
Complete the following equation.
Ca(OH)2 + ______ → ______ + H2O
Acidic or basic solutions are good conductors of electricity. Justify your answer.
The acid which contains four hydrogen atoms ______.
