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प्रश्न
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?
उत्तर
Methanoic acid is injected into the skin during a nettle-leaf-hair sting
a nettle-leaf-hair sting are acidic, as methanoic acid is injected into the body, which causes severe pain and an itching sensation. Applying a baking soda solution (a base) on the skin soothes the pain by neutralising the acid. Thus, the effect of these stings is neutralised.
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संबंधित प्रश्न
Name the gas evolved when dilute HCl reacts with sodium hydrogencarbonate. How is it recognised?
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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.
What effect does the concentration of H+ (aq) ions have on the nature of a solution?
What type of ions is formed:
when a base (or alkali) is dissolved in water?
Write chemical names from given formulae.
H2SO4
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| Group A | Group B |
| 1. Tamarind | a. Acetic acid |
| 2. Curd | b. Citric acid |
| 3. Lemon | c. Tartaric acid |
| 4. Vinegar | d. Lactic acid |
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