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Environment issue Test - 1
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Environment issue Test - 1
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  • Question 1/10
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    Global heating due to CO2 would cause plants to grow

    Solutions

    As CO2 is a natural fertiliser, the plants will grow longer and faster with increasing CO2 in the atmosphere. This may look as a beneficial aspect of global warming, but there are chances of depletion of characters and productivity of soil with it.

  • Question 2/10
    1 / -0

    Noise pollution is not associated with

    Solutions

    Cancer is not associated with noise pollution. It is caused due to other polluting factors.

  • Question 3/10
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    Gambusia fish helps in treatment of water pollution by

    Solutions

    Gambusia fish eats larvae and eggs of harmful organisms and helps in treatment of polluted water. Gambusia fish typically eat zooplankton, beetles, mayflies, caddisflies, mites, and other invertebrates.

  • Question 4/10
    1 / -0

    Background radiations in the atmosphere are produced by

    Solutions

    Radioactive substances, which occur naturally in soil and water, produce background radiations. Level of such radiations is so low that organisms are adapted to it.

  • Question 5/10
    1 / -0

    Which of the following is the correct sequence of events that take place in eutrophication?

    1. Excessive growth of algae
    2. Depletion of dissolved oxygen
    3. Bacteria feed on dead algal cells
    4. Aquatic body becomes rich in phosphates

    Solutions

    Eutrophication is the natural ageing of the lake by biological enrichment of water. In the first step, the aquatic body becomes rich in phosphates and nitrates naturally or by human activities. Due to enrichment by phosphates and nitrates, planktonic algae growth takes place excessively. This is referred to as algal bloom. As algae die, bacteria feed on them and increase their number, which leads to depletion of dissolved oxygen.

  • Question 6/10
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    Which of the following compounds is not found in photochemical smog?

    Solutions

    Carbon dioxide is not present in the photochemical smog. CO2 is a gas that is involved in global warming.

  • Question 7/10
    1 / -0

    Development of RBCs is affected by

    Solutions

    Development of RBC's is affected by over exposure to lead. Lead also affects functioning of cells, circulatory and nervous system.

  • Question 8/10
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    Directions: Choose the correct alternative from the following.

    A: Planting the plants of Phaseolus vulgaris can prevent pollution.
    R: Phaseolus vulgaris absorbs SO2.

    Solutions

    A is true. Phaseolus vulgaris reduces the toxicity and can absorb pollutants, but R is false as Phaseolus vulgaris absorbs CO2 and not SO2.

  • Question 9/10
    1 / -0

    Cyanide as a pollutant is mostly contributed by

    Solutions

    Cyanide can enter surface water through releases from industries using cyanide (metal finishing industries or iron and steel mills). Exposure to cyanide can cause rapid breathing, tremors and other neurological effects.

  • Question 10/10
    1 / -0

    The dry-weight of particles trapped by a filter is given by

    Solutions

    Total Suspended Solids (TSS) is the dry-weight of particles trapped by a filter.

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