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Comment on the following statements Evaporation causes cooling
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0
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8754
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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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4969
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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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13214
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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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28695
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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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8929
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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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1836
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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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3062
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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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6305
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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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7871
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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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12516
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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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4822
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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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3656
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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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19614
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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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19161
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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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1857
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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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3146
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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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4073
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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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10539
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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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7385
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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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5732
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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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6386
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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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8734
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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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5111
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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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4855
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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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3016
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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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4368
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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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6821
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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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5818
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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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3505
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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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7453
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March 19, 2018
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