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प्रश्न
Bee stings can be treated with:
(a) vinegar
(b) sodium hydrogencarbonate
(c) potassium hydroxide
(d) lemon juice
उत्तर
sodium hydrogencarbonate
When a bee stings a person, it injects an acidic solution into the person’s skin, which causes severe pain and an itching sensation. Applying a baking soda solution (sodium hydrogencarbonate solution, which is a base) soothes the pain by neutralising the acid.
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संबंधित प्रश्न
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.
It has been found that rubbing vinegar on the stung area of the skin of a person gives him relief. The person has been stung by:
(a) wasp
(b) ant
(c) honey bee
(d) nettle leaf hair
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\[\ce{Acid + Active metal -> Salt + hydrogen}\]
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Complete the following equation.
Mg+ ______ → ______ + H2.
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Na2CO3 + 2HCl → ______ + ______ + CO2↑
A metal 'M' on reacting with dilute acid liberates a gas 'G'. The same metal also liberates gas 'G' when reacts with a base.
- Write the name of gas 'G'.
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- Write chemical equations for the reactions of the metal with (1) an acid and (2) a base.
