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9th Class Science Matter in Our Surroundings Question Bank 9th CBSE Science Matter in Our Surroundings

  • question_answer
      You are given the following substances with their melting and boiling points.
    Substance Melting point Boiling point (°C)
    X -219 -183
    Y 119 445
    Z -15 78
    Identify the physical states of X, Y and Z at room temperature (30°C).

    Answer:

                   'X' is gas at room temperature. 'V is solid at room temperature. 'Z' is liquid at room temperature.


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