1. Discus the kinetic theory of matter.
2. What is evaporation? Discus the factors that influence evaporation.
3. Out of dry and wet air which is heavier.
4. What is S.I. unit of density?
5. Define latent heat of fusion.
6. Is dry ice is same thing as of ordinary ice.
7. What is lattice?
8. How will you demonstrate that particles of matter have space b/w them.
9. Why oxygen is called as gas.
10.What do you understand by the process of diffusion? Give one example.
11.State two properties of each solid, liquid and gas.
12.Why oxygen is called gas. Give two reasons.
13.What is plasma?
14.What happens when solid is heated.
15.Explain how it is possible to skate on ice without leaving trail behind.
16.What is the difference b/w gas and vapour?
17.If you decrease the surface area and increase the temperature, then the rate of evaporation (a) increase (b) decrease (c) remain same (d) may increase or decrease depending upon other factors
18.300k will have its corresponding temperature in degree centigrade as:-(a) 300c (b) 3000c (c) 270c (d) 6730c
19.Liquid to gas and gas to liquid changes are called:-(a) vaporization and condensation (b) condensation and vaporization (c) sublimation and condensation (d) condensation and sublimation
20.Physical state of water at 250c, 00c and 1000c is respectively (a) liquid, solid and gas (b) solid, liquid and gas (c) solid, gas and liquid (d) gas, solid and liquid
21.What happens when the temperature of the solids increase?
22.When heat is being supplied to a solid, then what does the heat energy do to the particles of solid?
23.Why is it that on increasing the wind speed the rate of evaporation increases?
24.Why do we say that evaporation is a surface phenomenon?
25.What is the state of inter particle distance inside a solid, liquid and gas?
26.Why it is that to smell cold food, we have to go close but smell of hot food reaches us several meters away?
27.Why is it that a wooden chair should be called a solid and not a liquid?
28.Give an experiment to show that ammonium chloride undergoes sublimation.
29.If the humidity in the air increase then the rate of evaporation:-(a) decrease (b) increase (c) remain same (d) both (b) and (a) depending upon the temperature
30.Which of the following statement is correct?(a) boiling is a bulk phenomenon and evaporation is a surface phenomenon (b) boiling is a surface phenomenon and evaporation is a bulk phenomenon (c) boiling and evaporation both are surface phenomenon (d) boiling and surface both are bulk phenomenon
31.If the temperature of a place is increase then evaporation:-(a) decrease (b) increase (c) remain same (d) none of the above
32.Which of the following have least inter atomic spacing? (a) solid (b) liquid (c) gases (d) plasma
33.What is evaporation? What are the factors affecting it?
34.What happen when we apply pressure to the particles of matter?
35.Define latent heat of vaporization and latent heat of fusion.
36.If the melting point of an object A is high then what state you expect it to be at room temperature?
37.Are the three state of matter inter-convertible? How can they interconnect?
38.How does evaporation cause cooling?
39.Why should we wear cotton clothes in summer?
40.Differentiate between physical and chemical change
