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  • Question 1
    1 / -0

    Find the incorrect statement

  • Question 2
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    The melting point of a substance is defined as the constant temperature at atmospheric pressure when:

  • Question 3
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    Which one of the following decreases the extent of evaporation of water?

  • Question 4
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    A desert cooler given comfort due to cooling caused by evaporation of water. Under which one of the following conditions it works more effectively?

  • Question 5
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    When alcohol is kept in a china dish it evaporates, temperature falls and cooling is produced. Which one is the correct method to record the temperature?

  • Question 6
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    In an endothermic process heat is absorbed, in an exothermic process heat is evolved and in an athermic process no thermal change is observed. What is the nature of evaporation of ether?

  • Question 7
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    Which of the two statement is true

    Statement A: Petrol, ether, acetone, water, CCl4are volatile liquid
    Statement B: Naphthalene, Camphor, iodine, NH4Cl undergo sublimation.

  • Question 8
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    Which of the following solids undergo sublimation upon heating?

  • Question 9
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    When the liquid starts boiling, the further heat energy which is supplied

  • Question 10
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    Which of the two statements is true?

    Statement A: Evaporation is a surface phenomenon but boiling is not.
    Statement B: The diffusion of the gases varies inversely as the square root of their densities.

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