Environmental Issues

Short Answer Type

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What is bioaccumulation?

The accumulation of toxic substances at the rate greater than at which the same substance is lost by an organism is called bioaccumulation.

Biomagnification is the process by which non- biodegradable chemicals become more concentrated in each link of food chain.

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    Multiple Choice Questions

    Freon gas causing stratospheric O3 depletion is mainly released from

    • refrigerator

    • automobile

    • thermal power plant

    • steel industry

    Answer

    SO2 pollution is indicated by

    • Desmodium (grasses)

    • Sphagnum (mosses)

    • Usnea (lichens)

    • Cucurbita (climbers)

    Answer

    Which one of the following is mainly responsible for green houses effect?

    • SO2

    • CO2

    • CO

    • O2

    Answer

    Nutrient enrichment of a lake will cause

    • eutrophication

    • stratification

    • biomagnification

    • bioaccumulation

    Answer
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    Soil carried by gravity is

    • alluvial

    • eolian

    • colluvial

    • glacial

    Answer

    Which of the following diseases is related to cadmium pollution?

    • Minamata

    • Pneumoconiosis

    • Anaemia

    • Itai- Itai

    Answer

    The true statement about 'green-house effect' is that it is caused by :

    • CO2 only

    • SO2 only

    • CO2 and SO2

    • CO2, CFC, CH4 and NO2 gases

    Answer

    Which of the following is not a Green-house gas?

    • N2O

    • CFC

    • O3

    • CO2

    Answer
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    For a clean environment, which one following is not essential?

    • Producer

    • Consumer

    • Decomposer

    • Polluter

    Answer
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