CHEMISTRY WORKSHEET. 1. Anything that occupies space and has weight. 2. The state of matter having maximum compressibility.
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1 CH.1 Q.1:- Name the Following:- 1. Anything that occupies space and has weight. 2. The state of matter having maximum compressibility. 3. The state which has maximum intermolecular space. 4. The process of conversion of solids directly to vapour state. 5. State of matter having maximum number of free surfaces. 6. The state of matter having definite shape and volume. 7. The process of conversion of liquid into vapour at constant temperature. 8. A compound which on heating does not leave behind any residue. 9. The state of matter which has no free surfaces. 10. The process of conversion of vapour into liquid. 11. The constant temperature at which liquid converts into vapour state. 12. The state of matter which flows from higher to lower level. 13. The state of matter which does not have definite shape but have definite volume. 14. The process of formation of clouds. 15. Name the process where the following takes place:- 1) Heating of camphor. 2) Water into steam by heating at constant temperature. 3) Water to ice by reducing temperature or cooling. 1
2 4) Water vapour to water by cooling. 5) Formation of distilled water. 6) Heating Iodine crystals. 7) Level of nail polish remover in bottle decreases when exposed to air. 16. What do you observe when:- 1) Ammonium chloride is heated. 2) Iodine crystals are heated. 3) Naphthalene balls are exposed to air at room temperature. 17. Arrange solid, liquid and gas in order of:- a) Intermolecular force of attraction. b) Intermolecular space. Q.2:- True or false:- 1) On addition of impurities, boiling point of liquid increases. 2) Pure water boils at 99 under 4 atmospheric pressure. 3) Solids have definite volume but do not have definite shape. 4) On heating, the particles looses Kinetic Energy. 5) Gaseous form of water is called water vapour. Q.3:- Complete the following:- 1. Gases are fluids because 2
3 2. During boiling, temperature remains constant because 3. Liquids flow from higher to lower level because 4. Gases flow in all direction because 5. Gases have maximum compressibility because 6. Solids have definite shape because 7. Gases diffuse (mix) rapidly because CH.2 Q.1:- Answer very shortly:- 1. State Charles Law. 3
4 2. State Boyle s law. 3. What is ideal gas? 4. What is absolute zero or Kelvin scale? 5. What is Kelvin scale of temperature? 6. Name the law which gives relationship between volume and temperature of an enclosed gas at constant temperature. 7. Write value of standard temperature in ) ; ) ). 8. What is boiling point of water at Kelvin scale when water boils at 100? (Answer with method) 9. Name the laws illustrated by following relationship:- 1) = Ans:- 2) = Ans:- 10. Convert the following as indicated:- a) 30 : b) 30 : 11. What are three states of matter? 4
5 12. Give Boyle s law equation. 13. Give Charles law equation. 14. State Gas law equation. 15. Mention unit of pressure. 16. Mention unit of volume. 17. Mention unit of temperature. 18. Why gases exert pressure? 19. What will happen if absolute temperature of gas is doubled? 20. What is Melting point of ice? 21. What is Boiling point of water? 22. Define diffusion. 5
6 23. Why gases are highly compressible. 24. Derive an expression of Charles law. Q.2:- Numericals:- 1. Two litre contains of Nitrogen and a pressure of 3.2 Atms what volume would be necessary to decrease the pressure to 1 Atms at same temperature. Solution:- 2. A gas occupies 255 ml volume at 3.2 Atms and 27. Calculate the pressure needed to reduce Volume to 160 ml at 300. Solution:- 6
7 3. Four litre of is kept at 27. Calculate its volume if temperature is lowered to 110 at same pressure. Solution:- 4. A gas occupies 150 of volume at 57 assuming that the pressure remains constant. Find the temperature to which gas must b heated so that volume triples. Solution:- 7
8 Q.3:- Do as directed:- 1. Explain graphically the Boyle s law. Ans:- 8
9 Q.4. Prove that temperature of 273 cannot be achieved. Ans:- Q.5. What is absolute temperature of gas at 0. Ans:- Q.6. Define Charles law based on Kelvin zero. Ans:- Q.7. If the initial volume of enclosed gas is 273 cc at 0 then find its volume at 1. Ans:- 9
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