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In the context of using biofuels as an alternative energy source, consider the following statements:
Biodiesel can eliminate the emissions of Nitrogen oxides (NOx).
  • They are derived from used cooking oil, plastic and municipal solid waste.
  • They can significantly reduce carbon dioxide emissions.
  • Biodiesel only upto one-tenth by volume can be blended with petroleum diesel.
    Which of the statements given above is/are correct?
    • a)
      1 only
    • b)
      2 and 3 only
    • c)
      4 only
    • d)
      1, 2, 3 and 4
    Correct answer is option 'B'. Can you explain this answer?
    Most Upvoted Answer
    In the context of using biofuels as an alternative energy source, con...
    • Statement 1 is incorrect. Number of studies show that using biodiesel and biodiesel blends slightly increases the generation of nitric oxide and nitrogen dioxide-any combination of which constitutes oxides of nitrogen (NOx). NOx increases can range anywhere from less than 1 percent to 15 percent higher than petro-diesel.
    • Statement 2 is correct. Biofuels are derived from renewable biomass resources and wastes such as Used Cooking Oil, Plastic, Municipal Solid Waste, waste gases, etc. and provide higher degree of national energy security in an environmentally friendly and sustainable manner by supplementing conventional energy resources, reducing dependence on imported fossil fuels and meet the energy needs of India’s urban and vast rural population.
    • Statement 3 is correct. Fossil fuel consumption is a major cause of climate change. Biofuels can reduce the consumption of fossil fuels and thus reduce carbon dioxide emissions, because biofuels are carbon neutral. The carbon dioxide that is emitted when a biofuel is burned merely returns to the atmospheric carbon dioxide that was taken into plants from the atmosphere by photosynthesis. Therefore, biofuels seem to be a very effective means for reducing these emissions.
    • Statement 4 is incorrect. Biodiesel can be blended with petroleum diesel and used in many different concentrations. The most common are B5 (up to 5% biodiesel) and B20 (6% to 20% biodiesel). B100 (pure biodiesel) is typically used as a blendstock to produce lower blends and is rarely used as a transportation fuel.
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    Community Answer
    In the context of using biofuels as an alternative energy source, con...
    Biodiesel is a type of biofuel that is derived from renewable sources such as used cooking oil, animal fats, and vegetable oils. It is considered as an alternative energy source due to its potential to reduce greenhouse gas emissions and its compatibility with existing diesel engines. In the context of using biofuels as an alternative energy source, the following statements can be evaluated:

    1. Biodiesel can eliminate the emissions of Nitrogen oxides (NOx):
    - Biodiesel has been shown to have lower emissions of nitrogen oxides compared to petroleum diesel. This is because biodiesel contains oxygen, which helps to improve the combustion process and reduce the formation of nitrogen oxides. However, it is important to note that while biodiesel can reduce nitrogen oxide emissions, it may not completely eliminate them.

    2. They are derived from used cooking oil, plastic, and municipal solid waste:
    - Biodiesel can be produced from a variety of feedstock, including used cooking oil, animal fats, vegetable oils, and even waste materials such as plastic and municipal solid waste. The advantage of using these feedstocks is that they are renewable and can help reduce dependence on fossil fuels.

    3. They can significantly reduce carbon dioxide emissions:
    - Biodiesel has been found to have lower carbon dioxide emissions compared to petroleum diesel. This is because biodiesel is produced from renewable sources that absorb carbon dioxide during their growth, such as plants and algae. When these feedstocks are converted into biodiesel, the carbon dioxide released during combustion is offset by the carbon dioxide absorbed during their growth, resulting in a net reduction in carbon dioxide emissions.

    4. Biodiesel only up to one-tenth by volume can be blended with petroleum diesel:
    - Biodiesel can be blended with petroleum diesel in various proportions. However, it is important to note that the blend ratio may vary depending on the engine and fuel system specifications. In general, biodiesel can be blended with petroleum diesel up to certain limits, with the most common blend being B20 (20% biodiesel and 80% petroleum diesel). Higher blend ratios, such as B100 (100% biodiesel), may require engine modifications or the use of specialized equipment.

    In summary, the correct statements are:

    2. They are derived from used cooking oil, plastic, and municipal solid waste.
    3. They can significantly reduce carbon dioxide emissions.

    Therefore, the correct answer is option B (2 and 3 only).
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    In the context of using biofuels as an alternative energy source, consider the following statements: Biodiesel can eliminate the emissions of Nitrogen oxides (NOx). They are derived from used cooking oil, plastic and municipal solid waste. They can significantly reduce carbon dioxide emissions. Biodiesel only upto one-tenth by volume can be blended with petroleum diesel. Which of the statements given above is/are correct?a)1 onlyb)2 and 3 onlyc)4 onlyd)1, 2, 3 and 4Correct answer is option 'B'. Can you explain this answer?
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    In the context of using biofuels as an alternative energy source, consider the following statements: Biodiesel can eliminate the emissions of Nitrogen oxides (NOx). They are derived from used cooking oil, plastic and municipal solid waste. They can significantly reduce carbon dioxide emissions. Biodiesel only upto one-tenth by volume can be blended with petroleum diesel. Which of the statements given above is/are correct?a)1 onlyb)2 and 3 onlyc)4 onlyd)1, 2, 3 and 4Correct answer is option 'B'. Can you explain this answer? for UPSC 2025 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about In the context of using biofuels as an alternative energy source, consider the following statements: Biodiesel can eliminate the emissions of Nitrogen oxides (NOx). They are derived from used cooking oil, plastic and municipal solid waste. They can significantly reduce carbon dioxide emissions. Biodiesel only upto one-tenth by volume can be blended with petroleum diesel. Which of the statements given above is/are correct?a)1 onlyb)2 and 3 onlyc)4 onlyd)1, 2, 3 and 4Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for UPSC 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In the context of using biofuels as an alternative energy source, consider the following statements: Biodiesel can eliminate the emissions of Nitrogen oxides (NOx). They are derived from used cooking oil, plastic and municipal solid waste. They can significantly reduce carbon dioxide emissions. Biodiesel only upto one-tenth by volume can be blended with petroleum diesel. Which of the statements given above is/are correct?a)1 onlyb)2 and 3 onlyc)4 onlyd)1, 2, 3 and 4Correct answer is option 'B'. Can you explain this answer?.
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