Q18 of 27 Page 29

Match the substances in Column I with those in Column II


Column II contains the things which we see in our daily life. We need to match them appropriately with correct acid or base which is present in them. Book gives info about all things in column II



More from this chapter

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16

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?

 17

Form a sentence using the following words – baking soda, ant bite, moist, effect, neutralised, rubbing.

 19

Fill the blanks in the following sentences

(a) Lemon juice and vinegar taste ___________ because they contain ___________.


(b) Turmeric and litmus are _________ acid-base indicators.


(c) Phenolphthalein gives _________ colour with lime water.


(d) When an acidic solution is mixed with a basic solution, they _________ each other forming _________ and water.

 20

Boojho, Paheli and their friend Golu were provided with a test tube each containing China rose solution which was pink in colour. Boojho added two drops of solution ‘A’ in his test tube and got dark pink colour. Paheli added 2 drops of solution ‘B’ to her test tube and got green colour. Golu added 2 drops of solution ‘C’ but could not get any change in colour. Suggest the possible cause for the variation in their results.