Matter in our surrounding
Important questions of chapter the matter in our surrounding
Very short answer type questions (1 mark each)
1. What is the physical nature of matter?
2. Give one example of diffusion.
3. What is the size of particles in matter as determined by the experiments?
4. Name two factors which influence the physical state of matter.
5. Arrange the three states of matter in the order of increasing intermolecular space.
6. How is ice changed into water and then into steam?
7. Name the property which is responsible for high compressibility of gases.
8. Name the commonly used unit of temperature. Express the melting point of ice on this scale of temperature.
9. Which of the two causes severe burns at the same temperature - steam or water?
10. Name the process responsible for cooling of water kept in an earthen pot.
11. Name a substance that is liquefied by changing both temperature and pressure.
12. Is evaporation an exothermic or endothermic process?
13. Under what conditions, the relative humidity is 100%?
Short answer type questions (2 marks each)
14. How can you support the particulate nature of matter with the help of an experiment involving the dissolution of sugar?
15. Show by a simple experiment that diffusion becomes faster when temperature is raised.
16. Define intermolecular force.
17. Write the physical state of matter that shows the property given below:
(a) most compressible form of matter (b) have definite shape and volume (c) have definite volume but have no fixed shape (d) rigid and incompressible
18. Why is the diffusion of a solid into another solid a very slow process?
19. Define latent heat of fusion.
20. Why does evaporation cause cooling?
21. Write the mathematical relationship for relative humidity.
22. How can matter change its physical state?
23. Describe the effect of heating on camphor.
Short answer type questions (3 marks each)
24. Gases exert pressure on the walls of the container? Give reason.
25. Name the factors which affect the rate of evaporation.
26. Define boiling and boiling point. How does normal boiling point differ from boiling point?
27. How does intermolecular force affect the boiling point of a liquid?
28. Draw a temperature-time plot for, ice
29. Why is solid carbon dioxide called dry ice?
30. How is the rate of evaporation of a liquid related to the intermolecular forces acting in it? On this basis define volatile liquids.
31. What is meant by the term relative humidity?
32. Solids are rigid and have definite shape and size. Give reasons.
Long answer type questions (5 marks each)
33. Write a short note on the particulate nature of matter.
34. How does competition between kinetic energy and the intermolecular force affect the physical state of matter?
35. Compare the properties of solids, liquids and gases.
36. What is meant by the change of state? How can the physical state of a substance be changed?
37. Describe sublimation. Name two substances which sublime on heating.
38. Why does temperature remain constant during melting and boiling?
39. Why does ice cream appear colder than water at the same temperature?
40. Give two applications of evaporation.
41. How will you show that air contains water vapour?
42. Write two differences between evaporation and vaporisation.
Important questions of chapter the matter in our surrounding
Very short answer type questions (1 mark each)
1. What is the physical nature of matter?
2. Give one example of diffusion.
3. What is the size of particles in matter as determined by the experiments?
4. Name two factors which influence the physical state of matter.
5. Arrange the three states of matter in the order of increasing intermolecular space.
6. How is ice changed into water and then into steam?
7. Name the property which is responsible for high compressibility of gases.
8. Name the commonly used unit of temperature. Express the melting point of ice on this scale of temperature.
9. Which of the two causes severe burns at the same temperature - steam or water?
10. Name the process responsible for cooling of water kept in an earthen pot.
11. Name a substance that is liquefied by changing both temperature and pressure.
12. Is evaporation an exothermic or endothermic process?
13. Under what conditions, the relative humidity is 100%?
Short answer type questions (2 marks each)
14. How can you support the particulate nature of matter with the help of an experiment involving the dissolution of sugar?
15. Show by a simple experiment that diffusion becomes faster when temperature is raised.
16. Define intermolecular force.
17. Write the physical state of matter that shows the property given below:
(a) most compressible form of matter (b) have definite shape and volume (c) have definite volume but have no fixed shape (d) rigid and incompressible
18. Why is the diffusion of a solid into another solid a very slow process?
19. Define latent heat of fusion.
20. Why does evaporation cause cooling?
21. Write the mathematical relationship for relative humidity.
22. How can matter change its physical state?
23. Describe the effect of heating on camphor.
Short answer type questions (3 marks each)
24. Gases exert pressure on the walls of the container? Give reason.
25. Name the factors which affect the rate of evaporation.
26. Define boiling and boiling point. How does normal boiling point differ from boiling point?
27. How does intermolecular force affect the boiling point of a liquid?
28. Draw a temperature-time plot for, ice
29. Why is solid carbon dioxide called dry ice?
30. How is the rate of evaporation of a liquid related to the intermolecular forces acting in it? On this basis define volatile liquids.
31. What is meant by the term relative humidity?
32. Solids are rigid and have definite shape and size. Give reasons.
Long answer type questions (5 marks each)
33. Write a short note on the particulate nature of matter.
34. How does competition between kinetic energy and the intermolecular force affect the physical state of matter?
35. Compare the properties of solids, liquids and gases.
36. What is meant by the change of state? How can the physical state of a substance be changed?
37. Describe sublimation. Name two substances which sublime on heating.
38. Why does temperature remain constant during melting and boiling?
39. Why does ice cream appear colder than water at the same temperature?
40. Give two applications of evaporation.
41. How will you show that air contains water vapour?
42. Write two differences between evaporation and vaporisation.
