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Environmental Issues BIOLOGY - Environmental Issues

Gujarat Board (GSEB) - STD 12 Science - BIOLOGY (GSEB - English Medium). 592 questions in this chapter.

Question types

Environmental Issues question types

592 questions across 5 question groups — pick any mix to generate a BIOLOGY paper with step-by-step answer keys.

592
Questions
5
Question groups
5
Question types
Sample Questions

Environmental Issues questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 1M.C.Q (1 Marks)1 Mark
What is $\text{BOD}?$
  • A
    The amount of $O_2$ utilized by organisms in water.
  • ✓
    The amount of $O_2$ utilized by microorganisms for decomposition.
  • C
    The total amount of $O_2$ present in water.
  • D
    All of the above.

Answer: B.

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Q 2M.C.Q (1 Marks)1 Mark
Air pollution is maximum by:
  • ✓
    Automobile exhausts and chemicals from industries.
  • B
    Sewage and pesticides
  • C
    Detergents and pesticides
  • D
    Sewage and effluents

Answer: A.

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Q 61 Marks Question1 Mark
An electrostatic precipitator in a thermal power plant is not able to generate high voltage of several thousands. Write the ecological implication because of it.
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Q 112 Marks Questions2 Marks
How did a citizen group called Friends of Arcata Marsh, Arcata, California, USA, help to improve water quality of the marshland using Integrated Waste Water Treatment? Explain in four steps.
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Q 152 Marks Questions2 Marks
Plenty of algal bloom is observed in a pond in your locality.
  1. Write what has caused this bloom and how does it affect the quality of water.
  2. Suggest a preventive measure.
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Q 173 Marks Question3 Marks
List all the wastes that you generate, at home, school or during your trips to other places, could you very easily reduce? Which would be difficult or rather impossible to reduce?
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