Arrange the following in the decreasing order (most important first) of their importance, for the welfare of human society. Give reasons for your answer. Biogas, citric acid, penicillin and curd.
ANSWER:-
According to their decreasing importance it is:-
Pencellin -biogas- Citric Acid - Curd
Pencillin is the most important product for the comfort of human siciety. It is an antibiotic used for controlling many infections or used for controlling bacterial diseases. The second most important is Biogas. It is an eco- friendly source of energy makes no harmful pollution. Similarly the next important product is Citric acid. It is used as food preservative. The last or least important product is Curd. It is a food item which is obtained by the action of bacteria in milk, the bacteria is known as oflactobacillus.
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