|
Comment on the following statements Evaporation causes cooling
|
|
0
|
8666
|
March 19, 2018
|
|
Discuss the various factors which affect the rate of evaporation
|
|
0
|
4938
|
March 19, 2018
|
|
While heating ice in a beaker with a thermometer suspended in it, a student recorded the following observations:
|
|
0
|
12953
|
March 19, 2018
|
|
Describe an activity to determine the boiling point of water and melting point of ice
|
|
0
|
28589
|
March 19, 2018
|
|
Describe the continuous motion of particles of matter with the help of an activity
|
|
0
|
8902
|
March 19, 2018
|
|
How does evaporation differ from boiling?
|
|
0
|
1823
|
March 19, 2018
|
|
You want to wear your favourite shirt to a party, but the problem is that it is still wet after a wash
|
|
0
|
3045
|
March 19, 2018
|
|
Explain how the rate of evaporation of a liquid is affected with:
|
|
0
|
6278
|
March 19, 2018
|
|
A student heats a beaker containing ice and water
|
|
0
|
7818
|
March 19, 2018
|
|
Explain interconversion of three states of matter with the help of flow chart
|
|
0
|
12465
|
March 19, 2018
|
|
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
|
|
0
|
4796
|
March 19, 2018
|
|
Classify the following into osmosis/diffusion
|
|
0
|
3655
|
March 19, 2018
|
|
Suggest an activity to show that the rate of diffusion of liquids decreases with increase in density of the liquid
|
|
0
|
19549
|
March 19, 2018
|
|
Substance ‘A’ has high compressibility and can be easily liquefied. It can take up the shape of any container
|
|
0
|
18665
|
March 19, 2018
|
|
It is a hot summer day, Priyanshi and Ali are wearing cotton and nylon clothes respectively
|
|
0
|
1853
|
March 19, 2018
|
|
Why do people sprinkle water on the roof after a hot sunny day?
|
|
0
|
3144
|
March 19, 2018
|
|
Why do we feel comfortable under a fan when we are perspiring?
|
|
0
|
4055
|
March 19, 2018
|
|
Why do trees acquire more leaves during summer?
|
|
0
|
10482
|
March 19, 2018
|
|
Why do wet clothes dry quickly in the sun than in the shade?
|
|
0
|
7335
|
March 19, 2018
|
|
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?
|
|
0
|
5575
|
March 19, 2018
|
|
Why do the doctors advise to put strips of wet cloth on the forehead of a person having high fever?
|
|
0
|
6376
|
March 19, 2018
|
|
A glass tumbler containing hot water is kept in the freezer compartment of a refrigerator
|
|
0
|
8688
|
March 19, 2018
|
|
Which gas is called dry ice? Why?
|
|
0
|
5065
|
March 19, 2018
|
|
What do you understand by the term ‘latent heat of fusion’? How much is the latent heat of fusion of ice?
|
|
0
|
4799
|
March 19, 2018
|
|
Why does the temperature of a substance remain constant during its melting point or boiling point?
|
|
0
|
3010
|
March 19, 2018
|
|
Alka was making tea in a kettle
|
|
0
|
4361
|
March 19, 2018
|
|
Give two ways in which melting points and boiling points can be useful
|
|
0
|
6798
|
March 19, 2018
|
|
Why steam at 100°C is better for heating purposes than water at 100°C?
|
|
0
|
5815
|
March 19, 2018
|
|
Can a rubber band change its shape on stretching? Is it a solid?
|
|
0
|
3499
|
March 19, 2018
|
|
Why are gases compressible but not liquids?
|
|
0
|
7442
|
March 19, 2018
|