With reference to ‘fly ash’ produced by the power plants using coal as fuel, which of the
following statements is/are correct?
(1) Fly ash can be used in the production of bricks for building construction.
(2) Fly ash can be used as a replacement for some of the Portland cement contents of concrete.
(3) Fly ash is made up of silicon dioxide and calcium oxide only, and does not contain any toxic
elements.
Select the correct answer using the code given below.
Prelims
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Environment › PollutionXImpact & remediation
Environment › PollutionXImpact & remediation
Options
Answer
(A)
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Environment › PollutionXImpact & remediation
In the Union Budget 2011-12, a full exemption from the basic customs duty was extended to the bio-based asphalt (bioasphalt). What is the importance of this material?
1. Unlike traditional asphalt, bio-asphalt is not based on fossil fuels.
2. Bioasphalt can be made from non-renewable resources.
3. Bioasphalt can be made from organic waste materials.
4. It is eco-friendly to use bioasphalt for surfacing of the roads.
Which of the statements given above are correct?Options
Answer
(B)
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Environment › PollutionXSources
Environment › PollutionXSources
Consider the following statements:
I. Carbon dioxide (CO₂) emissions in India are less than 0.5 t CO₂/capita.
II. In terms of CO₂ emissions from fuel combustion, India ranks second in Asia-Pacific region.
III. Electricity and heat producers are the largest sources of CO₂ emissions in India.Which of the statements given above is/are correct?
Options
Answer
(C)
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Environment › PollutionXSources
Consider the following statements:
Statement I:
Studies indicate that carbon dioxide emissions from cement industry account for more than 5% of global carbon emissions.
Statement II:
Silica-bearing clay is mixed with limestone while manufacturing cement.
Statement III:
Limestone is converted into lime during clinker production for cement manufacturing.
Which one of the following is correct in respect of the above statements?Options
Answer
(B)
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Environment › PollutionXSources
Consider the following statements:
Statement-I:
Many chewing gums found in the market are considered a source of environmental pollution.
Statement-II:
Many chewing gums contain plastic as gum base.Which one of the following is correct in respect of the above statements?
Options
Answer
(A)
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Environment › PollutionXSources
With reference to perfluoroalkyl and polyfluoroalkyl substances (PFAS) that are used in making many consumer products, consider the following statements:
1. PFAS are found to be widespread in drinking water, food, and food packaging materials.
2. PFAS are not easily degraded in the environment.
3. Persistent exposure to PFAS can lead to bioaccumulation in animal bodies.
Which of the statements given above are correct?Options
Answer
(D)