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Comment on the following statements Evaporation causes cooling
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0
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8606
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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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4915
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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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12415
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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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28299
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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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8879
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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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1809
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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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3039
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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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6241
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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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7786
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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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12370
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March 19, 2018
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Design an experiment to show that ammonium chloride undergoes sublimation
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0
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19643
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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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4767
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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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3647
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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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19452
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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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18340
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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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1845
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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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3134
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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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4041
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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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10385
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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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7315
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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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5543
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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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6360
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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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8638
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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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5041
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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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4764
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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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3002
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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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4344
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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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6740
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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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5810
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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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3488
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March 19, 2018
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