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it has been found that rubbing vinegar o...

it has been found that rubbing vinegar on the stung area of the skin of a person given him relief. Ther person has been stung by:

A

wasp

B

ant

C

honey bee

D

nettle leaf hair

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A
a
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When an ant stings a person, the solution of substance A is rubbed on the stung area of the skin to get relief from pain. The substance A is also used in kitchen for cooking purposes. Another susbtance B is sour in taste and contains an organic acid C. It is used in making pickles. When a solution of A is mixed with B, then a change D takes place to produce bubbles of gas E. What are substances A ?

When an ant stings a person, the solution of substance A is rubbed on the stung area of the skin to get relief from pain. The substance A is also used in kitchen for cooking purposes. Another susbtance B is sour in taste and contains an organic acid C. It is used in making pickles. When a solution of A is mixed with B, then a change D takes place to produce bubbles of gas E. Name the acid C.

When an ant stings a person, the solution of substance A is rubbed on the stung area of the skin to get relief from pain. The substance A is also used in kitchen for cooking purposes. Another susbtance B is sour in taste and contains an organic acid C. It is used in making pickles. When a solution of A is mixed with B, then a change D takes place to produce bubbles of gas E. Name the gas E.

When an ant stings a person, the solution of substance A is rubbed on the stung area of the skin to get relief from pain. The substance A is also used in kitchen for cooking purposes. Another susbtance B is sour in taste and contains an organic acid C. It is used in making pickles. When a solution of A is mixed with B, then a change D takes place to produce bubbles of gas E. What are substances B ?

When an ant stings a person, the solution of substance A is rubbed on the stung area of the skin to get relief from pain. The substance A is also used in kitchen for cooking purposes. Another susbtance B is sour in taste and contains an organic acid C. It is used in making pickles. When a solution of A is mixed with B, then a change D takes place to produce bubbles of gas E. What type of change is D ?

Blood has been found to be isotonic with

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?

The set -point theory has been advanced in the area of

LAKHMIR SINGH & MANJIT KAUR-ACID, BASES AND SALTS-Exercise
  1. Bee stings can be treated with:

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  2. Wasp stings can be treated with :

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  3. it has been found that rubbing vinegar on the stung area of the skin o...

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  4. Fresh milk has a pH of 6. When milk changes into curd, the pH value wi...

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  5. Which acid is produced in our stomach ? What happens if there is an ex...

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  6. The daffodil plants grow best in a soil having a pH range of 6.0 to 6....

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  7. A milkman adds a very small amount of baking soda to fresh milk. (a)...

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  8. Which of the following elements would form oxides which would indicate...

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  9. Te pH values of five solutions, A, B,C,D and E are given below: A 1...

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  10. Potatoes grow well on Anhad's farm which has soil with a pH of 5.5. An...

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  11. Here are some results of solutions tested with universal indicator pap...

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  12. Solution A turns universal indicator blue to purple whereas solution B...

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  13. A first-aid manual suggests that vinergar should be used to treat wasp...

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  14. Hydrochloric acid reacts with a metal X to form a gas Y which burns wi...

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  15. What is the chemical formula of (a) baking soda, and (b) washing soda?

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  16. Write the chemical formula of (i) soda ash, and (ii) sodium carbonate ...

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  17. State whether the following statement is true of false: Copper sulph...

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  18. Which of the following salt has a blue colour and why? CuSO(4).5H(2)...

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  19. What would be the colour of litmus in a solution of sodium carbonate?

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  20. State the common and chemical names of the compound formed when plaste...

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