matter in our surrounding
Assignment on matter in our surrounding based on topic change of state boiling, melting, latent heat
1. What is meant by the change of state?
2. Name the physical states in which matter can exist under normal conditions.
3. How can matter change its state?
4. Name the factors which decide whether a given substance would be in solid, liquid or gaseous state.
5. Describe the two temperature scales, (i) used in our everyday life, and (ii) used mainly in scientific/research work.
6. Melting point of ice on the celsius scale is 0°C. Express this temperature on the Kelvin scale.
7. Give one example each of the following.
(i) Vaporisation (ii) Sublimation (iii) Condensation (iv) Evaporation.
8. Name the process by which dry ice can be converted into carbon dioxide gas.
9. Define the following terms; (i) Melting, (ii) Boiling, (iii) Freezing, (iv) Condensation.
10. Define (a) Latent heat of fusion of ice.
(b) Latent heat of vaporisation of water.
Assignment 2
1. What is evaporation? Give one example of evaporation.
2. On what factors the process of evaporation depend?
3. Why does evaporation cause cooling?
4. Why do wet clothes dry faster in the sun than in shade?
5. Why do wet clothes dry faster when spread in open?
6. Why should we wear cotton clothes during summers?
7. Is evaporation an exothermic or endothermic process?
8. Why does the water kept in an earthen pot (matka) during hot summer days become cold?
9. Under what condition of humidity no evaporation is possible?
Assignment on matter in our surrounding based on topic change of state boiling, melting, latent heat
1. What is meant by the change of state?
2. Name the physical states in which matter can exist under normal conditions.
3. How can matter change its state?
4. Name the factors which decide whether a given substance would be in solid, liquid or gaseous state.
5. Describe the two temperature scales, (i) used in our everyday life, and (ii) used mainly in scientific/research work.
6. Melting point of ice on the celsius scale is 0°C. Express this temperature on the Kelvin scale.
7. Give one example each of the following.
(i) Vaporisation (ii) Sublimation (iii) Condensation (iv) Evaporation.
8. Name the process by which dry ice can be converted into carbon dioxide gas.
9. Define the following terms; (i) Melting, (ii) Boiling, (iii) Freezing, (iv) Condensation.
10. Define (a) Latent heat of fusion of ice.
(b) Latent heat of vaporisation of water.
Assignment 2
1. What is evaporation? Give one example of evaporation.
2. On what factors the process of evaporation depend?
3. Why does evaporation cause cooling?
4. Why do wet clothes dry faster in the sun than in shade?
5. Why do wet clothes dry faster when spread in open?
6. Why should we wear cotton clothes during summers?
7. Is evaporation an exothermic or endothermic process?
8. Why does the water kept in an earthen pot (matka) during hot summer days become cold?
9. Under what condition of humidity no evaporation is possible?
