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.
The order is as follows: Penicillin- Biogas − Citric acid − Curd.
Penicillin is the most important towards welfare of human society. Penicillin is broad spectrum antibiotic obtained from a fungus Penicillium chrysogenum. It is used for the treatment of various bacterial diseases.
Biogas is the second improtant product towards welfare of human society. Biogas is obtained from natural sources and thus it is ecofriendlly source of energy.
The third important product is citric acid. Citric acid is used to preserve various types of foods and protect the foods from deterioration for long time.
The fourth least important compound is curd. Curd is a food item which is obtained by the action of lactobacillus on milk.
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