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(a) Write the name given to bases that a...

(a) Write the name given to bases that are highly soluble in water. Give an ezample.
(b) Why does bee using cause pain and irritation ? Rubbing of baking soda on the stinf area gives relief. How ?

Text Solution

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(a) Highly soluble bases are known as alkalies. For exampe, NaOH
(b) The pain caused by bee sting is due to formic acid (HCOOH) which enters our body. Rubbing by baking soda `(NaHCO_(3))` neutralises the effect of formic acid and gives relief.
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Why does Honey bee sting cause pain and irritation? Give a method to get relief from the discomfort

If a person is stung by a bee, it causes burning pain and irritation. Application of which of the following on the stung area can give relief from the pain?

Reshma is the student of class X in a city school. One day she was sitting in the school garden with her friends during the recess. There was a tall tree at the edge of the garden having a large honeycomb attached to it. Some students were playing cricket in te school playground. Suddenly the cricket ball hit the honeycomb due to which a large numbr of honey-bees started flying here and there. Reshma was stung on her face by a honey-bee. The sting was so painful that Reshma started crying. She was immediately rushed to the science laboratory. One of her classmates Shanta gave her vinegar solution to rub on the stung area to get relief from pain. Another clasmate Amarjit, howerver, asked Reshma to rub baking soda solution on the stung area of face. On rubbing baking soda solution, Reshma felt a lot of relief from pain. (a) What kind of liquid is injected into the skin when a honey-bee stings a person? (b) Why did rubbing baking soda solution on the stung area of skin give relief from pain? (c) What type of chemical reaction takes place when baking soda solution is rubbed on the honey-bee sting area? (d) Why do you think rubbing the honey-bee sting area with vinegar could not give relief from pain? (e) Name one plant whose stinging hair on leaves inject a similar liquid to that injected by honey-bee sting and can be treated by rubbing baking soda solution? (f) What vaues are displayed by Amarjit in this episode?

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DINESH PUBLICATION-ACIDS, BASES AND SALTS -SHORT ANSWER QUESTIONS
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