Question

Give reasons for the following.
(a) Yeast is added to the batter used to make 'dosas'.
(b) It is important to brush one's teeth before going to bed.
(c) Reducing the quantity of salt in pickle can cause it to go bad soon.
(d) Foods, from puffed or enlarged cans, should not be consumed.
(e) When using frozen food items one should take out only the required
quantities; thawed food should never be refrozen.
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Answer 1

Answer:

(1) Yeast is added to disagree so that fermentation takes place fermentation helps in digestion.

(2) While we sleep, all the bacteria will feed away on our teeth which leads to tooth decay.when we go to bed without brushing the plaque begins to harden . So, it is important to brush one's teeth before going to bed.

3) As salt reduces the water content and make it available for microorganisms to grow ,the food get preserved . That's why pickles are preserved by the addition of salt on it.

4)Coz it is not only the hydrogen gas inside the can that resulted swelling but also it may contain some dangerous microorganisms which is not good enough for heath

Hope this helps you ❤