Science

9th

grade

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9th CBSE 30/08/2021

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3 questions

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  • 1. Multiple Choice
    30 seconds
    1 pt

    The mass of a molecule of water is

    3x10-26 kg

    3x10-25 kg

    1.5x10-26 kg

    2.5x10-26 kg

  • 2. Multiple Choice
    30 seconds
    1 pt

    Cell walls of sclerenchyma are rich in

    cellulose

    pectin

    lignin

    hemicellulose

  • 3. Multiple Choice
    30 seconds
    1 pt

    When an object is thrown upward, the force of gravity

    is

    opposite to the direction of motion

    in the same direction as the direction of motion

    becomes zero at the highest point

    increases as it rises up

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