3
Question
The following are some statements about eutrophication.
I) It is mainly due to the organic wastes from agriculture and industry.
II) It is over growth of algae and fungi in the ponds or lakes.
III) Hydrogen substituted compounds are used in place of CFCs.
Which of the following is/are true?
The following are some statements about eutrophication.
I) It is mainly due to the organic wastes from agriculture and industry.
II) It is over growth of algae and fungi in the ponds or lakes.
III) Hydrogen substituted compounds are used in place of CFCs.
Which of the following is/are true?
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Solution
The correct option is D I, II & III
Enrichment of water bodies with phosphates like nutrients is called eutrophication.
Organic wastes produced from agricultural and industrial wastes include phosphate.
It supports the abnormal growth of algae and the lakes and ponds become marshy.
The interim replacements for CFCs are hydrochlorofluorocarbons (HCFCs), which deplete stratospheric ozone, but to a much lesser extent than CFCs. Hence, Hydrogen substituted compounds are used in place of CFCs.
Statements I, II, III are all correct.
Option D is correct.
Enrichment of water bodies with phosphates like nutrients is called eutrophication.
Organic wastes produced from agricultural and industrial wastes include phosphate.
It supports the abnormal growth of algae and the lakes and ponds become marshy.
The interim replacements for CFCs are hydrochlorofluorocarbons (HCFCs), which deplete stratospheric ozone, but to a much lesser extent than CFCs. Hence, Hydrogen substituted compounds are used in place of CFCs.
Statements I, II, III are all correct.
Option D is correct.
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