English

While playing in a park, a child was stung by a wasp. Some elders suggested applying paste of baking soda and others lemon juice as remedy. Which remedy do you think is appropriate and why?

Advertisements
Advertisements

Question

While playing in a park, a child was stung by a wasp. Some elders suggested applying paste of baking soda and others lemon juice as remedy. Which remedy do you think is appropriate and why?

Very Short Answer
Advertisements

Solution

Wasp sting injects a liquid into the skin which is acidic in nature. Hence, baking soda is applied as it is basic in nature and neutralises the acid.

shaalaa.com
  Is there an error in this question or solution?
Chapter 5: Acids, Bases and Salts - SHORT ANSWER QUESTIONS [Page 30]

APPEARS IN

NCERT Exemplar Science [English] Class 7
Chapter 5 Acids, Bases and Salts
SHORT ANSWER QUESTIONS | Q 16. | Page 30

RELATED QUESTIONS

A white shirt has a yellow stain of curry. When soap is rubbed on this shirt during washing, the yellow stain turns reddish-brown. On rinsing the shirt with plenty of water, the reddish-brown stain turns yellow again.

  1. Name the natural indicator present in curry stain.
  2. Explain the changes in colour of this indicator which take place during washing and rinsing the shirt.
  3. What is the nature of soap (acidic/basic) as shown by the indicator present in curry stain?

What effect does the concentration of \[\ce{H+_{( aq)}}\] ions have on the nature of a solution?


Give two examples of the following:

oxy-acid


Match the pairs. 

Group A Group B
1. Tamarind a. Acetic acid
2. Curd b. Citric acid
3. Lemon c. Tartaric acid
4. Vinegar d. Lactic acid

HCl, HNO3, C2H5OH, C6H12O6 all contain H atoms but only HCl and HNO3 show acidic character. Why?


Which of the following statements is true for acids?


Fill in the cross word given in figure with the help of the clues provided.


Across

(2) The solution which does not change the colour of either red or blue litmus.

(4) Phenolphthalein gives pink colour in this type of solution.

(7) Colour of blue litmus in lemon juice.

Down

(1) It is used to test whether a substance is acidic or basic.

(3) It is a natural indicator and gives pink colour in basic solution.

(5) Nature of ant’s sting.

(6) It is responsible for the increase in temperature during a neutralisation reaction.


A farmer was unhappy because of his low crop yield. He discussed the problem with an agricultural scientist and realised that the soil of his field was either too acidic or too basic. What remedy would you suggest the farmer to neutralise the soil?


Name the acid present in the given table.


Explain the following:

H3PO3 is not a tribasic acid.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×