Science

9th

grade

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9th CBSE 29/08/2021

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3 questions

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  • 1. Multiple Choice
    30 seconds
    1 pt

    A sample of pure water, irrespective of its source

    contains 11.1% hydrogen and 88.9% oxygen. The data

    supports

    law of constant proportions

    law of conservation of mass

    law of reciprocal proportions

    law of multiple proportions

  • 2. Multiple Choice
    30 seconds
    1 pt

    There are specific regions of plant body that constantly

    remain in the state of division. What are they?

    Perisperm

    Endosperm

    Meristem

    Stele

  • 3. Multiple Choice
    30 seconds
    1 pt

    An astronaut in the orbit in a spacecraft feels

    weightlessness

    due to the absence of gravity inside

    due to the fact that spacecraft has no energy

    because acceleration in the orbit is equal to

    acceleration of gravity outside

    there is no gravity outside

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