31. Why jams and pickles are immersed in concentrated sugar solution or oil
(a) They do not rot due to their own growth
(b) They do not rot due to fungal or bacterial action
(c) They do not dry
(d) They become good in taste
Ans. (b) Salting of pickles and addition of sugar to jams prevent their decay by microbes, or the later get killed due to plasmolysis or due to high concentration of salt or sugar.
(21)
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