Multiple Choice Questions on With reference to the Dissolved Oxygen DO in the water bodies consider the following statements Stil........... for UPSC Civil Services Examination (General Studies) Preparation

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Multiple Choice Questions

With reference to the Dissolved Oxygen DO in the water bodies consider the following statements Stil...........

Geography Water - Issues, Challenges and Solutions
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    With reference to the Dissolved Oxygen (DO) in the water bodies, consider the following statements

    1. Still water has more amount of Dissolved Oxygen than running stream of water.
    2. Level of Dissolved Oxygen will decrease if the temperature of a river increases.

    Select the correct statement.

    1 only

    Incorrect Answer

    2 only

    Correct Answer

    Both

    Incorrect Answer

    None

    Incorrect Answer
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    Explanation:
    • Water bodies receive oxygen from the atmosphere and from aquatic plants. Running water, such as that of a swift moving stream, dissolves more oxygen than the still water of a pond or lake.
    • Oxygen becomes less soluble in warmer and polluted waters. Hence, any increase in water temperature means the level of Dissolved Oxygen will decrease.

    Hence option 2nd is correct.

    By: Shubham Tiwari
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