Management of Natural Resources NCERT Solution, study material, CBSE Notes
NCERT Solution: Management of Natural Resources

1. From the list given below pick the item that is not a natural resource
(a) Soil
(b) Water
(c) Electricity
(d) Air
Ans. (c) Electricity

2. The most rapidly dwindling natural resource in the world is
(a) water
(b) forests
(c) wind
(d) sunlight
Ans. (b) forests
Explanation: Water, wind and sunlight are non-exhaustible resources. Forests are beings cleared due to human activities.

3. The most appropriate definition of a natural resource is that it is a substance/commodity that is
(a) present only on land
(b) a gift of nature which is very useful to mankind
(c) a man-made substance placed in nature
(d) available only in the forest
Ans. (b) a gift of nature which is very useful to mankind
Explanation: Natural resource is present everywhere and hence options ‘a’ and ‘d’ can be easily ruled out.

4. The main cause for abundant coliform bacteria in the river Ganga is
(a) disposal of unburnt corpses into water
(b) discharge of effluents from electroplating industries
(c) washing of clothes
(d) immersion of ashes
Ans. (a) disposal of unburnt corpses into water.
Explanation: Coliform bacteria mainly come from human excreta. So, they can be present in unburnt corpses.

5. The pH of water sample collected from a river was found to be acidic in the range of 3.5 – 4.5, on the banks of the river were several factories that were discharging effluents into the river. The effluents of which one of the following factories is the most likely cause for lowering the pH of river water?
(a) Soap and detergent factory
(b) Lead battery manufacturing factory 
(c) Plastic cup manufacturing factory
(d) Alcohol distillery
Ans. (d) Alcohol distillery
Explanation: Fermentation results in production of lactic acid and ethanol. Ethanol too gets converted into ethanoic acid on oxidation. Hence, waste from alcohol distillery contains acidic substance.

6. The pH range most conducive for life of fresh water plants and animal’s is
(a) 6.5 – 7.5
(b) 2.0 – 3.5
(c) 3.5 – 5.0
(d) 9.0 – 10.5
Ans. (a) 6.5 – 7.5
Explanation: A neutral pH is most conducive for living beings in freshwater. This pH range is almost neutral.

7. The three R’s that will help us to conserve natural resources for long term use are
(a) recycle, regenerate, reuse
(b) reduce, regenerate, reuse
(c) reduce, reuse, redistribute
(d) reduce, recycle, reuse
Ans. (d) reduce, recycle, reuse

8. Given below are a few statements related to biodiversity. Pick those that correctly describe the concept of biodiversity
(i) Biodiversity refers to the different species of flora and fauna present in an area
(ii) Biodiversity refers to only the flora of a given area
(iii) Biodiversity is greater in a forest
(iv) Biodiversity refers to the total number of individuals of a particular species living in an area
(a) (i) and (ii)
(b) (ii) and (iv)
(c) (i) and (iii)
(d) (ii) and (iii)
Ans. (c) (i) and (iii)
Explanation: Biodiversity included both flora and fauna and includes more than one species. Hence, options (ii) and (iv) are incorrect.

9. Among the statements given below select the ones that correctly describe the concept of sustainable development
(i) Planned growth with minimum damage to the environment
(ii) Growth irrespective of the extent of damage caused to the environment
(iii) Stopping all developmental work to conserve the environment
(iv) Growth that is acceptable to all the stakeholders
(a) (i) and (iv) 
(b) (ii) and (iii)
(c) (ii) and (iv)
(d) (iii) only
Ans. (a) (i) and (iv)
Explanation: Growth should never be at the cost of environment. Similarly, human progress and development is also necessary. Hence, options (ii) and (iii) are incorrect.

10. In our country, vast tracts of forests are cleared and a single species of plant is cultivated. This practice promotes
(a) biodiversity in the area
(b) monoculture in the area
(c) growth of natural forest
(d) preserves the natural ecosystem in the area
Ans. (b) monoculture in the area
Explanation: Growing a single species of plant or rearing a single species of animal is called monoculture.


11. A successful forest conservation strategy should involve
(a) protection of animals at the highest trophic level
(b) protection of only consumers
(c) protection of only herbivores
(d) comprehensive programme to protect all the physical and biological components
Ans. (d) comprehensive programme to protect all the physical and biological components 
Explanation: Proper balance of all the abiotic and biotic component is the only way to conserve an ecosystem.

12. The important message conveyed by the ‘Chipko Movement’ is
(a) to involve the community in forest conservation efforts
(b) to ignore the community in forest conservation efforts
(c) to cut down forest trees for developmental activities
(d) government agencies have the unquestionable right to order destruction of trees in forests
Ans. (a) to involve the community in forest conservation efforts
Explanation: The whole community was involved in chipko movement. This was the main reason for success of this movement.

13. In our country, there are attempts to increase the height of several existing dams like Tehri and Almati, dams across Narmada. Choose the correct statements among the following that are a consequence of raising the height of dams
(i) Terrestrial flora and fauna of the area is destroyed completely
(ii) Dislocation of people and domestic animals living in the area
(iii) Valuable agricultural land may be permanently lost
(iv) It will generate permanent employment for people
(a) (i) and (ii)
(b) (i), (ii) and (iii) 
(c) (ii) and (iv)
(d) (i), (iii) and (iv)
Ans. (b) (i), (ii) and (iii)

14. Expand the abbreviation GAP
(a) Governmental Agency for Pollution Control
(b) Gross Assimilation by Photosynthesis
(c) Ganga Action Plan
(d) Governmental Agency for Animal Protection
Ans. (c) Ganga Action Plan

15. Select the incorrect statement
(a) Economic development is linked to environmental conservation
(b) Sustainable development encourages development for current generation and
conservation of resources for future generations
(c) Sustainable development does not consider the view points of stakeholders
(d) Sustainable development is a long planned and persistent development
Ans. (c) Sustainable development does not consider the view points of stakeholders
Explanation: Involvement of all stakeholders in necessary for success of any programme. This could be seen in the story of Arabari forest in west Bengal.

16. Which of the following is not a natural resource?
(a) Mango tree
(b) Snake
(c) Wind
(d) Wooden house
Ans. (d) Wooden house
Explanation: A house man-made.

17. Select the wrong statement
(a) Forests provide variety of products
(b) Forests have greater plant diversity
(c) Forests do not conserve soil
(d) Forests conserve water
Ans. (c) Forests do not conserve soil
Explanation: Forest conserve soil in many ways. Forest prevents soil erosion. Forests help in adding humus to the soil; because of decomposition of organic matter (like fallen leaves).

18. Arabari forests of Bengal is dominated by
(a) Teak
(b) Sal
(c) Bamboo
(d) Mangroove
Ans. (b) Sal 
19. Ground water will not be depleted due to
(a) afforestation
(b) thermal power plants
(c) loss of forest, and decreased rainfall
(d) cropping of high water demanding crops
Ans. (a) afforestation
Explanation: Plants make the soil pervious to seepage of water. Thus, afforestation will help in recharge of groundwater.

20. Opposition to the construction of large dams is due to
(a) social reasons
(b) economic reasons
(c) environmental reasons
(d) all the above
Ans. (d) All the above
Explanation: Destruction of ecosystem in the surrounding is the environmental reason. Displacement of people is social reason. Economic reason is that displaced people are robbed off their traditional employment.

21. Khadins, Bundhis, Ahars and Kattas are ancient structures that are examples for
(a) grain storage
(b) wood storage
(c) water harvesting
(d) soil conservation
Ans. (c) water harvesting

22. Pick the right combination of terms which has no fossil fuel.
(a) Wind, ocean and coal
(b) Kerosene, wind and tide
(c) Wind, wood, sun
(d) Petroleum, wood, sun
Ans. (c) Wind, wood, sun

23. Select the eco-friendly activity among the following
(a) Using car for transportation
(b) Using polybags for shopping
(c) Using dyes for colouring clothes
(d) Using windmills to generate power for irrigation
Ans. (d) Using windmills to generate power for irrigation

24. It is important to make small check dams across the flooded gullies because they
(i) hold water for irrigation
(ii) hold water and prevent soil erosion
(iii) recharge ground water 
(iv) hold water permanently
(a) (i) and (iv)
(b) (ii) and (iii)
(c) (iii) and (iv)
(d) (ii) and (iv)
Ans. (b) (ii) and (iii)
Explanation: Check dams prevent soil erosion by preventing the run off. By holding water for a considerable time, check dams also help in recharging the groundwater. 








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