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9th Class Science Matter in Our Surroundings Question Bank Self Test-1

  • question_answer
    People normally put some Naphthalene ball in the box in which they keeps cloths and winter blankets. After some weeks they find that there is no Naphthalene ball left in the box. Why does the Naphthalene ball disappears with time, without leaving any residue?

    A)  Condensation

    B)  Sublimation

    C)  Evaporation

    D)  Diffusion

    E)  None of these

    Correct Answer: B

    Solution :


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