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Experiments on Breathing and Respiration

Why do people...

Question

Why do people put a cloth on the mouth of pickle jar?

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Solution

A cloth is put over a pickle jar so that carbon dioxide gas released by fermentation is released back. The cloth protects any insect etc from falling into the jar with allowing gaseous exchange.

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Study the two statements labelled as Assertion (A) and Reason (R).

Assertion (A): Putting a wet spoon in a pickle jar spoils the pickle.

Reason (R): Moisture favours the growth of fungus that spoils the food.

Point out if:

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