With reference to coal-based thermal power plants in India, consider the following statements : 1. None of them uses seawater. 2. None of them is set up in water-stressed district. 3. None of them is privately owned. How many of the above statements are correct?
- A.Only one
- B.Only two
- C.All three
- D.None
Correct answer
Explanation
The correct answer is D, None. All three statements are false: some coal plants use seawater, many stand in water-stressed districts, and a large share are privately owned.
Coastal plants such as the Tata Mundra and Adani Mundra plants in Gujarat and several plants on the Andhra Pradesh and Tamil Nadu coasts draw seawater for cooling, and the government has encouraged this to save fresh water. On the other hand, a large part of India's coal capacity lies in districts that face high water stress, for example in Maharashtra's Vidarbha region and parts of Chhattisgarh and Madhya Pradesh, which has led to shutdowns in dry years. Ownership is mixed: besides central and state utilities such as NTPC, private firms like Tata Power, Adani Power, JSW Energy and Reliance Power run big coal plants.
A is wrong because not even one statement is correct. B is wrong for the same reason. C is wrong because every statement is false.
Exam tip: "none of them" statements are usually traps; one counter-example makes them false.
Practice Questions
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- A.Forestland
- B.Pasture land
- C.Marginal land
- D.Barren and wasteland
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India's land-use records follow a nine-fold classification, and 'marginal land' is not one of its classes.
Read the full explanation →Climax mine, the largest producer of molybdenum, is located in
- A.Canada
- B.USA
- C.Australia
- D.South Africa
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The Climax mine is in Colorado, in the Rocky Mountains near Leadville, and it was long the world's largest molybdenum mine.
Read the full explanation →Which one of the following statements about the Coriolis force is not correct ?
- A.It is maximum at the Poles.
- B.It is absent at the Equator.
- C.It deflects the wind to the right direction in the southern hemisphere.
- D.It deflects the wind to the right direction in the northern hemisphere.
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In the southern hemisphere the Coriolis force turns winds to the left, not the right. The Coriolis force is an apparent force caused by the Earth's rotation.
Read the full explanation →Which of the following statements regarding continent of Antarctica is/are correct? 1. It has the highest average elevation as compared to all other continents. 2. Mount Vinson is the highest peak of this continent. Select the correct answer using the code given below.
- A.1 only
- B.2 only
- C.Both 1 and 2
- D.Neither 1 nor 2
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Read the full explanation →The ratio of gross cropped area to the net sown area is called
- A.cropping intensity
- B.intensity of crop rotation
- C.crop productivity
- D.cropping diversity
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Cropping intensity is gross cropped area divided by net sown area, usually shown as a percentage, and it tells how many times the same land is cropped in a year.
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