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State PSC Environment & Ecology — practice questions

Explore 446 free Environment & Ecology questions in State PSC Geography. Open each question or exercise to read its content, reference answers and available explanation.

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Environment & Ecology questions and exercises with answers

Showing questions 1–30 of 446.

A globe shows mostly blue. Water covers about what share of the earth's surface?Read the answer and worked solution →Of all the water on earth, roughly how much is fresh water?Read the answer and worked solution →India has about 16 per cent of the world's people. What share of the world's water resources does it have?Read the answer and worked solution →How much water does India receive from precipitation in a year?Read the answer and worked solution →India has about 10,360 rivers and tributaries longer than what length?Read the answer and worked solution →Only 32 per cent of surface water can be used. What is the usable amount?Read the answer and worked solution →The Ganga, Brahmaputra and Barak basins cover one third of India's area. What share of surface water do they hold?Read the answer and worked solution →India's total replenishable groundwater is about how much?Read the answer and worked solution →A tubewell farmer in Punjab pumps heavily. Which States use groundwater most intensively?Read the answer and worked solution →Brackish lagoon water in Kerala, Odisha and West Bengal is used for what?Read the answer and worked solution →Bhakra-Nangal, Hirakud and Nagarjuna Sagar are examples of what?Read the answer and worked solution →Which sector uses about 89 per cent of India's surface water?Read the answer and worked solution →Industry uses only 2 per cent of surface water. What share does the domestic sector use?Read the answer and worked solution →In Punjab, Haryana and western Uttar Pradesh, what share of net sown area is irrigated?Read the answer and worked solution →Wells and tubewells irrigate what share of Punjab's net irrigated area?Read the answer and worked solution →Over-pumping groundwater in Rajasthan and Maharashtra has raised which contaminant?Read the answer and worked solution →Which two rivers are named as the most polluted in India?Read the answer and worked solution →The Central Pollution Control Board monitors water quality at how many stations?Read the answer and worked solution →The Yamuna is most polluted between Delhi and which town?Read the answer and worked solution →In which year was the Water (Prevention and Control of Pollution) Act passed?Read the answer and worked solution →Which Central Government watershed project is executed by Gram Panchayats?Read the answer and worked solution →Neeru-Meeru, meaning Water and You, is a water harvesting programme of which State?Read the answer and worked solution →Catch the water factsRead the answer and worked solution →Pop the polluted riversRead the answer and worked solution →Run the water numbersRead the answer and worked solution →Slice the harvestingRead the answer and worked solution →High or low groundwater useRead the answer and worked solution →Who uses the waterRead the answer and worked solution →Type the numberRead the answer and worked solution →Water bingoRead the answer and worked solution →

Worked practice questions

A globe shows mostly blue. Water covers about what share of the earth's surface?

  1. 71 per cent
  2. 51 per cent
  3. 31 per cent
  4. 91 per cent
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Correct answer: A. 71 per cent

1. About 71 per cent of the surface is water. 2. Only about 3 per cent of it is fresh. 3. Very little fresh water is usable. _Source: syllabus Geography, India People and Economy, Chapter 6, Water Resources._

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Of all the water on earth, roughly how much is fresh water?

  1. About 13 per cent
  2. About 3 per cent
  3. About 30 per cent
  4. About 50 per cent
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Correct answer: B. About 3 per cent

1. Water is a cyclic resource. 2. Fresh water is only about 3 per cent. 3. Its availability varies over space and time. _Source: syllabus Geography, India People and Economy, Chapter 6, Water Resources._

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India has about 16 per cent of the world's people. What share of the world's water resources does it have?

  1. About 4 per cent
  2. About 16 per cent
  3. About 25 per cent
  4. About 1 per cent
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Correct answer: A. About 4 per cent

1. India has 2.45 per cent of world area. 2. It has about 4 per cent of world water. 3. Yet it holds 16 per cent of the population. _Source: syllabus Geography, India People and Economy, Chapter 6, Water Resources._

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