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Arrange the following in the decreasing ...

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

Text Solution

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Penicillin`to`Biogas`to`Citric acid`to`Curd
Pencillin: It is the most important product (Antibiotic) for the welfare of Human socity. It is used for controlling various bacterial diseases.
Biogas: It is an eco-friendly source of energy.
Citric acid: It is used as a food preservative.
Curd: A food item obtained by the action of lactobacillus bacteria of milk.
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