States of Matter
I. MCQ - Choose Appropriate Alternative
1. __________ was the first scientist who expressed a relation between pressure and the volume of a gas. (Charles, Boyle, Avogadro)
2. If the pressure upon a gas confined in a vessel varies, the temperature remaining same, the volume will __________. (Vary directly as the pressure, Vary inversely as the temperature, Vary inversely as the pressure)
3. The statement concerning the relation of temperature to the volume of a gas under fixed pressure was first synthesized by __________. (Boyle, Charles, Avogadro)
4. Absolute Zero is __________. (273°C, -273°C, -273°K)
5. Gases intermix to form __________. (Homoge\= ous mixture, Heterogenous mixture, compound)
6. Water can exists in __________ physical states at a certain condition of temperature pressure. (One, Two, three)
7. The temperature at which the volume of a gas theoretically becomes zero is called __________. (Transition temperature, Critical Temperature, Absolute Zero)
8. Gases deviate from ideal behaviour at __________ pressure and __________ temperature. (Low, High, Normal)
9. Very low temperature can by produced by the __________ of gases. (Expansionn, Contraction, Compression)
10. Boiling point of a liquid __________ with increase in pressure. (increases, decreases, remains same)
11. 273°K = __________ (100°C, 273°C, 0°C)
12. -273°C is equal to __________. (0°K, 273°K, 100°K)
13. Evaporation takes place at __________. (All temperatures, At constant temperature, at 100°C)
14. __________ is the temperature at which the vapour pressure of a liquid becomes equal to atmospheric pressure.
15. The freezing point of water in Fahrenheit scale is __________. (0°F, 32°F, 212°F)
16. All gases change to solid before reaching to __________. (-100°C, 0°C, -273°C)
17. Pressure of the gas is due __________ of the molecules on the wall of the vessel. (Collisionns, Attraction, Repulsion)
18. Boiling point of water in absolute scale is __________. (212°K, 100°K, 373°K)
19. Boyle’s Law relates __________. (Pressure and volume, Temperature and volume, Pressure and temperature)
20. Charles Law deals with __________ relationship. (temperature and volume, pressure and volume, temperature and pressure)
21. Effusion is the escape of gas through __________. (A small pin hole, Semi permeable membrane, porous container)
22. The expression P = P1 + P2 + P3 represents __________ mathematically. (Graham’s Law, Avogadro’s Law, Dalton’s law of partial Pressure)
23. According to __________ equal volumes of all gases at the same temperature and pressure contain equal number of molecules. (Graham’s Law, Avogadro’s Law, Dalton’s Law)
24. The boiling point of pure water is __________. (32°C, 100°F, 373°K)
25. The internal resistance of a liquid to flow is called __________. (Surface tension, Capillary action, Viscosity)
26. The existence of different crystals forms of the same substance is called __________.(Isomorphism, Polymorphism, Isotopes)
27. Rate of Evaporation __________ on increasing temperature.(Increases, Decreases, Remains same)
28. The temperature at which more than one crystalline forms of a substance coexist is called the __________.(Critical Temperature, Transition Temperature, Absolute Temperature)
29. The gases which strictly obey the gas laws are called __________.(Ideal gases, Permanent gases, Absolute gases)
30. Lighter gas diffuse __________ than the heavier gases.(More readily, Less readily, Very slowly)
II. Fill in the Blank
1. The intermixing of gases or liquids in a container irrespective of their densities, is called __________.
2. At constant temperature, if the pressure of a given mass of a gas is decreased, its volume will __________.
3. A volume of __________ dm3 will hold 128 gms of SO2.
4. At constant temperature of a given mass of a gas, the product of its __________ and __________ is constant.
5. The rates of diffusion of gases are __________ proportional to the square root of their densities.
6. Gases deviate from ideal behaviour more markedly at high __________.
7. Liquid diffuse __________ than gases.
8. An imaginary line passing through the centre of a crystal is called __________.
9. The temperature at which more than one crystalline forms of a substance coexist in equilibrium is called __________.
10. Two or more substances crystallizing in the same form is called __________.
11. The existence of solid substances in more than one crystalline form is known as __________.
12. Rate of diffusion of gases is __________ as compared to liquids.
13. Boiling point of a liquid __________ with the pressure.
14. Mercury in a glass tube forms __________ curvature.
15. Gases can be compressed to __________ extent.
16. Viscosity of a liquid __________ with the increase of temperature.
17. Surface tension of water __________ by adding soap solution into it.
18. The internal resistance to the flow of a liquid is called __________.
19. The rise or the fall of a liquid in a capillary tube is called __________.
20. Matter exists in __________ states.
21. The freezing point of water in Fahrenheit scale is __________.
22. Boiling point of water is __________ °K.
23. SI unit for measurement of pressure is __________.
24. The value of gas law constant R = __________ dm3 atm/°K/mole.
25. The absolute Zero is equal to __________.
26. If P is plotted against 1/V at constant temperature a __________ is obtained.
27. Gases __________ in heating.
28. The pressure of air __________ at higher altitude.
29. Standard temperature means __________.
30. Standard pressure means __________.
31. Cooling is caused by __________ of gases.
32. Rate of diffusion of O2 is __________ times more than H2.
33. H2O has __________ viscosity than CH3OH.
34. Mercury does not wet the glass surface due to its higher __________.
35. Surface tension of mercury is __________ than water.
36. Viscosity can be easily measured by an instrument called __________.
37. The pressure exerted by the vapours when these vapours are in equilibrium with the liquid is called __________.
38. Vapour pressure __________ at high temperature.
39. Boyle’s Law and Charles Law can be combined into the mathematical expression __________.
40. Equal volumes of all gases at the same temperature and pressure contain __________ number of molecules.
41. The average Kinetic energy of a gas is proportional to its __________ temperature.
42. Kinetic equation may be mathematically written as __________.
43. The temperature at which two crystalline forms of a substance can coexist in equilibrium is called __________.
44. Lighter gases diffuse __________ than heavier gases.
45. Rain drops are __________ in shape.
46. Due to surface tension, the surface area of the liquid is __________.
47. Water __________ in the capillary tube.
48. Viscosity of a solution at 10°C is __________ than at 20°C.
49. Shape of NaCl crystal is __________.
50. Pressure of a dry gas is __________ than the pressure of a moist gas.
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