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Comment on the following statements Evaporation causes cooling
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0
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8339
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March 19, 2018
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Discuss the various factors which affect the rate of evaporation
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0
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4729
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March 19, 2018
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While heating ice in a beaker with a thermometer suspended in it, a student recorded the following observations:
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0
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11070
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March 19, 2018
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Describe an activity to determine the boiling point of water and melting point of ice
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0
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26571
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March 19, 2018
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Describe the continuous motion of particles of matter with the help of an activity
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0
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8669
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March 19, 2018
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How does evaporation differ from boiling?
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0
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1711
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March 19, 2018
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You want to wear your favourite shirt to a party, but the problem is that it is still wet after a wash
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0
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2971
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March 19, 2018
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Explain how the rate of evaporation of a liquid is affected with:
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0
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6031
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March 19, 2018
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A student heats a beaker containing ice and water
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0
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7618
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March 19, 2018
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Explain interconversion of three states of matter with the help of flow chart
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0
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11755
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March 19, 2018
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Explain what happens to the molecular motion and energy of 1 kg of water at 273 K when it is changed into ice at same temperature
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0
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4552
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March 19, 2018
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Classify the following into osmosis/diffusion
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0
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3589
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March 19, 2018
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Suggest an activity to show that the rate of diffusion of liquids decreases with increase in density of the liquid
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0
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18743
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March 19, 2018
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Substance ‘A’ has high compressibility and can be easily liquefied. It can take up the shape of any container
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0
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16949
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March 19, 2018
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It is a hot summer day, Priyanshi and Ali are wearing cotton and nylon clothes respectively
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0
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1788
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March 19, 2018
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Why do people sprinkle water on the roof after a hot sunny day?
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0
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3046
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March 19, 2018
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Why do we feel comfortable under a fan when we are perspiring?
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0
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3924
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March 19, 2018
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Why do trees acquire more leaves during summer?
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0
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9867
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March 19, 2018
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Why do wet clothes dry quickly in the sun than in the shade?
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0
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7144
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March 19, 2018
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Look at the following figures and suggest in which of the glass containers, i.e., A, B, C or D, the rate of evaporation will be the highest?
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0
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5443
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March 19, 2018
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Why do the doctors advise to put strips of wet cloth on the forehead of a person having high fever?
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0
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6289
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March 19, 2018
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A glass tumbler containing hot water is kept in the freezer compartment of a refrigerator
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0
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8473
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March 19, 2018
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Which gas is called dry ice? Why?
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0
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4921
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March 19, 2018
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What do you understand by the term ‘latent heat of fusion’? How much is the latent heat of fusion of ice?
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0
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4555
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March 19, 2018
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Why does the temperature of a substance remain constant during its melting point or boiling point?
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0
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2933
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March 19, 2018
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Alka was making tea in a kettle
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0
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4285
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March 19, 2018
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Give two ways in which melting points and boiling points can be useful
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0
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6324
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March 19, 2018
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Why steam at 100°C is better for heating purposes than water at 100°C?
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0
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5709
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March 19, 2018
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Can a rubber band change its shape on stretching? Is it a solid?
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0
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3375
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March 19, 2018
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Why are gases compressible but not liquids?
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0
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7345
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March 19, 2018
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