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Q1. Consider the following statements :
1. Coal ash contains arsenic, lead and mercury.
2. Coal-fired power plants release sulphur dioxide and oxides of nitrogen into the environment.
3. High ash content is observed in Indian coal.
Which of the statements given above is/are correct ? UPSC Prelims 2020
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Q2. What is the use of biochar in farming ?
1. Biochar can be used as a part of the growing medium in vertical farming.
2. When biochar is a part of the growing medium, it promotes the growth of nitrogen-fixing microorganisms.
3. When biochar is a part of the growing medium, it enables the growing medium to retain water for longer time.
Which of the statements given above is/are correct ? UPSC Prelims 2020
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Q3. What is/are the advantage/advantages of zero tillage in agriculture ?
1. Sowing of wheat is possible without burning the residue of previous crop.
2. Without the need for nursery of rice saplings, direct planting of paddy seeds in the wet soil is possible.
3. Carbon sequestration in the soil is possible.
Select the correct answer using the code given below : UPSC Prelims 2020
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Q4. According to India's National Policy on Biofuels, which of the following can be used as raw materials for the production of biofuels ?
1. Cassava
2. Damaged wheat grains
3. Groundnut seeds
4. Horse gram
5. Rotten potatoes
6. Sugar beet
Select the correct answer using the code given below : UPSC Prelims 2020
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Q5. In the context of India, which of the following is/are considered to be practice(s) of eco-friendly agriculture ?
1. Crop diversification
2. Legume intensification
3. Tensiometer use
4. Vertical farming
Select the correct answer using the code given below : UPSC Prelims 2020
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Q6. What are the advantages of fertigation in agriculture ?
1. Controlling the alkalinity of irrigation water is possible.
2. Efficient application of Rock Phosphate and all other phosphatic fertilizers is possible.
3. Increased availability of nutrients to plants is possible.
4. Reduction in the leaching of chemical nutrients is possible.
Select the correct answer using the code given below : UPSC Prelims 2020
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Q7. Consider the following statements :
1. 36% of India’s districts are classified as “overexploited” or “critical” by the Central Ground Water Authority (CGWA).
2. CGWA was formed under the Environment (Protection) Act.
3. India has the largest area under groundwater irrigation in the world.
Which of the statements given above is/are correct ? UPSC Prelims 2020
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Q8. In the context of which one of the following are the terms 'pyrolysis and plasma gasification' mentioned? UPSC Prelims 2019
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Q9. Consider the following statements :
1. Some species of turtles are herbivores.
2. Some species of fish are herbivores.
3. Some species of marine mammals are herbivores.
4. Some species of snakes are viviparous.
Which of the statements given above are correct? UPSC Prelims 2019
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Q10. Why is there a great concern about the 'microbeads' that are released into environment? UPSC Prelims 2019
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Q11. Consider the following :
1. Carbon monoxide
2. Methane
3. Ozone
4. Sulphur dioxide
Which of the above are released into atmosphere due to the burning of crop/biomass residue? UPSC Prelims 2019
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Q12. Consider the following statements :
1. Agricultural soils release nitrogen oxides into environment.
2. Cattle release ammonia into environment.
3. Poultry industry releases reactive nitrogen compounds into environment.
Which of the statements given above is/are correct? UPSC Prelims 2019
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Q13. As per the Solid Waste Management Rules, 2016 in India, which one of the following statements is correct? UPSC Prelims 2019
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Q14. In India, 'extended producer responsibility' was introduced as an important feature in which of the following? UPSC Prelims 2019