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  1. Asked: In:

    List two advantages associated with water harvesting at the community level.

    shamlal

    Two advantages: (l) Recharges ground water (ii) Mitigates floods and droughts Brings rivers and wells back to life and makes more water available for use

    Two advantages:
    (l) Recharges ground water

    (ii) Mitigates floods and droughts
    Brings rivers and wells back to life and makes more water available for use

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    • 2
  2. Asked: In:

    List four specific characteristics of the images of the objects formed by convex mirrors.

    shamlal

    Four specific characteristics: (l) Virtual (ii) Erect (iii) Diminished (iv) Object distance more than the image distance (v) Laterally inverted

    Four specific characteristics:
    (l) Virtual

    (ii) Erect

    (iii) Diminished
    (iv) Object distance more than the image distance

    (v) Laterally inverted

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    • 2
  3. Asked: In:

    Why should biodegradable and non-biodegradable wastes be discarded in two separate dustbin?

    shamlal

    So that the time and energy required in segregation may be saved and waste may be disposed off quickly.

    So that the time and energy required in segregation may be saved and waste may be disposed off quickly.

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    • 3
  4. Asked: In:

    List two functions performed by the testis in human beings.

    shamlal

    Two functions of testis: (i) To produce sperms (ii) To produce male sex hormone/testesterone.

    Two functions of testis:

    (i) To produce sperms
    (ii) To produce male sex hormone/testesterone.

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    • 3
  6. Asked: In:

    Write the name and formula of the 2nd member of homologous series having general formula CnH2n-2.

    shamlal

    . Propyne . C3H4

    . Propyne

    . C3H4

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    • 3