The question asks to identify common pollutants found in drinking water in some parts of India from a given list. This requires knowledge of water quality issues prevalent in India.
Based on this analysis, Arsenic, Fluoride, and Uranium are known and significant pollutants found in drinking water in various parts of India.
C) 1, 3 and 5 only. This option correctly identifies Arsenic, Fluoride, and Uranium as significant drinking water pollutants in India.
The question asks to identify the important pollutants released by the steel industry in India. We need to consider the various processes involved in steel production and the by-products or emissions generated.
Considering all these points, all four listed pollutants are indeed significant emissions from the steel industry.
D) 1, 2, 3 and 4. All the listed pollutants – oxides of sulphur, oxides of nitrogen, carbon monoxide, and carbon dioxide – are major emissions from the steel industry due to the combustion of fossil fuels, reduction processes, and high-temperature operations involved in steelmaking.
The question asks to identify the correct statements regarding the Organization for the Prohibition of Chemical Weapons (OPCW). We need to evaluate each statement based on the known facts about OPCW.
B) 2 and 3 only
Statements 2 and 3 accurately describe key functions and mandates of the OPCW. Statement 1 is incorrect as the OPCW is an independent international organization, not an EU body.
The question asks about the primary application of Biological Oxygen Demand (BOD). BOD is a crucial environmental parameter used to assess water quality. Understanding its definition and purpose will lead to the correct answer.
Correct Option: C) Pollution assay in aquatic ecosystems
The question asks about the advantages of bioremediation in solving pollution problems. We need to evaluate each given statement for its accuracy regarding bioremediation.
C) 1 and 3 only. Statements 1 and 3 accurately describe advantages or characteristics of bioremediation. Statement 2 is incorrect because bioremediation is not effective for the complete degradation of heavy metals.
The question asks to identify correctly matched pairs of commonly used materials and unwanted/controversial chemicals found in them. We need to evaluate each pair based on common knowledge and scientific understanding of food and cosmetic additives/contaminants.
D) 1, 2 and 3. All three pairs are correctly matched. Lead is a known contaminant in lipstick, brominated vegetable oils were used in soft drinks and are controversial, and monosodium glutamate is a common and sometimes controversial additive in Chinese fast food.