The question asks about "oilzapper," a term that was in the news. This requires knowledge of environmental technologies, specifically those related to oil pollution. We need to identify the correct application or nature of oilzapper from the given options.
Correct Option: A) It is an eco-friendly technology for the remediation of oily sludge and oil spills.
The question asks to identify current sources of lead poisoning, even after lead has been banned from petrol. We need to evaluate each given option to determine if it is a known source of lead exposure.
B) 1 and 3 only. Smelting units release lead into the environment, and old lead-based paints are a significant source of exposure.
The question asks about the specific role of ultraviolet (UV) radiation in water purification systems. We need to evaluate each given statement to determine its accuracy regarding UV's function.
Based on the evaluation, only statement 1 accurately describes the role of UV radiation in water purification.
Correct Option: A) 1 only
The question asks about the components involved in the formation of photochemical smog. Photochemical smog is a type of air pollution that forms when sunlight reacts with certain pollutants in the atmosphere. Understanding the primary precursors and conditions for its formation is key to answering this question.
A) NO\(_2\), O\(_3\) and peroxyacetyl nitrate in the presence of sunlight — This option correctly identifies the key reactants (NO\(_2\)) and major resultant products (O\(_3\) and peroxyacetyl nitrate) that are characteristic of photochemical smog formation, all occurring in the presence of sunlight.
The question asks to identify the substances released into the environment as e-waste from old and used computers or their parts. This requires knowledge of common hazardous materials found in electronic components.
B) 1, 2, 3, 5 and 6 only. These elements (Beryllium, Cadmium, Chromium, Mercury, and Lead) are well-documented hazardous components found in various parts of electronic devices, contributing to environmental pollution when improperly disposed of as e-waste.
The question asks about the primary pollutants responsible for acid rain. Acid rain is a significant environmental issue caused by the emission of certain gases into the atmosphere, which then react with water, oxygen, and other chemicals to form acidic compounds.
D) nitrous oxide and sulphur dioxide — Sulfur dioxide (\(\text{SO}_2\)) is a major contributor to acid rain, forming sulfuric acid. Nitrous oxide (\(\text{N}_2\text{O}\)) is one of the nitrogen oxides (\(\text{NO}_x\)) that contributes to the formation of nitric acid. While other nitrogen oxides like \(\text{NO}\) and \(\text{NO}_2\) are more directly involved in nitric acid formation, nitrous oxide is listed here as a representative nitrogen oxide. Therefore, this option correctly identifies the two main types of pollutants.