Self Studies
Self Studies
Self Studies
Self Studies
Selfstudy
Selfstudy

Environmental Issues Test - 34

Result Self Studies

Environmental Issues Test - 34
  • Score

    -

    out of -
  • Rank

    -

    out of -
TIME Taken - -
Self Studies

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Self Studies Self Studies
Weekly Quiz Competition
  • Question 1
    1 / -0
    Chernobyl nuclear tragedy occurred in
    Solution
    The Chernobyl disaster was a nuclear accident that occurred on 26 April 1986 at the Chernobyl nuclear power plant in Ukraine. In this accident, large quantities of radioactive particles were released into the atmosphere, which spread over much of the western USSR and Europe. It was the worst nuclear accident in history.
  • Question 2
    1 / -0
    Environment is warmed up by
    Solution
    The greenhouse effect is caused by the greenhouse gases. The gases methane, carbon dioxide, and water vapour trap the solar radiations which need to be reflected back to the atmosphere and increase the temperature of the earth. The greenhouse is considered as the direct cause of global warming.
    Thus, the correct answer is option D. 
  • Question 3
    1 / -0
    At what height over the earth does the ozone layer exist?
    Solution
    The ozone layer is present in the stratosphere above the Earth. The layer is present at a distance of about 20-30 km away from the surface of the Earth. The layer of ozone is responsible for the absorption of the harmful UV radiations from the solar radiations. These radiations are prevented from entering the Earth's atmosphere to prevent the development of skin cancer. 
    Thus, the correct answer is option D. 
  • Question 4
    1 / -0
    BOD stands for
    Solution
    Biological oxygen demand (BOD) is used to describe the amount of oxygen consumed by decomposers to degrade organic matter present in a given water sample at certain temperature over a specific time period. Thus, the correct answer is option A.
  • Question 5
    1 / -0
    Which one of following pairs of gases is the major cause of greenhouse effect?
    Solution

    A. Correct Option-D
    B. Explanation For Correct Option

    • Greenhouse gases are gases that trap heat from the sun. 
    • Without these gases, heat would escape back into space and the earth would be colder than normal temperature.
    • Because of how they warm our planet, these gases are referred to as greenhouse gases. 
    • The major greenhouse gases are methane, carbon dioxide, nitrous oxide, and chlorofluorocarbons. 

  • Question 6
    1 / -0
    Which of the following provides nutrients to the seedlings to grow in forests?
    Solution
    Animals living in the forest include herbivores and carnivores. The dung of these animals are decomposed by insects living in the soil. This contributes to the fertility of the soil by adding organic matter and nutrients, such as nitrogen, that is trapped by bacteria in the soil. This provides nutrients to the seedlings to grow in forests. Thus the correct answer is option C.
  • Question 7
    1 / -0
    Radioactive pollution along Kerala coast is due to
    Solution
    The largest concentration of monazite sand is found on the Kerala coast. Thorium and Uranium are derived from monozite (a rare phosphate mineral). The coastal belt of Karunagappally, Kerala is known for high background radiation from thorium-containing monazite sand. This has increased the risk of cancer in this area. So, the correct answer is 'Thorium'.
  • Question 8
    1 / -0
    High BOD values for a river means that river water
  • Question 9
    1 / -0
    Eutrophication is caused by
    Solution
    Correct Option: A
    Explanation :
    • Eutrophication is termed as excessive plant and protoctist growth due to the augmented availability of  1 or additional limiting growth factors required for photosynthesis such as daylight, carbon dioxide, and nutrient fertilizers.
    •  This can be a retardant in marine habitats like lakes because it can cause algal blooms.
    •  Some algae even manufacture toxins that are harmful to higher types of life. waste matter and detergents are the most precipitating agents of eutrophication. Hence, Eutrophication is caused by sewage and detergents.
  • Question 10
    1 / -0
    Through food chain radioactive Sr is deposited in which part of human body? 
    Solution
    Sr$$^{90}$$ is a radioactive isotope of strontium. It is formed in nuclear reactors or during the explosion of nuclear weapons. A large portion of this strontium accumulates in the bone. It behaves like calcium and mostly attaches to the surfaces of bones. This leads to cancer as a result of damage to the genetic material of the bone, nose, and lung and leukemia cells. Thus the correct answer is option D.
Self Studies
User
Question Analysis

  • Correct -

  • Wrong -

  • Skipped -

My Perfomance
  • Score

    -

    out of -
  • Rank

    -

    out of -
Re-Attempt Weekly Quiz Competition
Self Studies Get latest Exam Updates
& Study Material Alerts!
No, Thanks
Self Studies
Click on Allow to receive notifications
Allow Notification
Self Studies
Self Studies Self Studies
To enable notifications follow this 2 steps:
  • First Click on Secure Icon Self Studies
  • Second click on the toggle icon
Allow Notification
Get latest Exam Updates & FREE Study Material Alerts!
Self Studies ×
Open Now