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States of Matter
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States of Matter
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25 Questions

1. By what factor does the average velocity of agaseousmoleculeincreasewhen thetemperature (in Kelvin) is doubled? [2011]
2. Van der Waal\'s real gas - act as an ideal gas - at which conditions? [2002]
3. Maximum deviation from ideal gas isexpected from: [2013]
4. Absolute zero is defined as the temperature[1990]
5. A gas is said to behave like an ideal gas whenthe relation PV/T= constantWhen do youexpect a real gas to behave like an ideal gas?[1991]
6. Select one correct statementIn the gasequation - PV= nRT [1992]
7. Under what conditions will a pure sample ofan ideal gas not only exhibit a pressure of 1 atmbut also a concentration of 1 mole litre-“1? (R=0.082 litre atm mol -“1 deg-“ )1 [1993]
8. In a pair of immiscible liquids - a commonsolute dissolves in both and the equilibrium isreachedThen the concentration of the solute inupper layer is [1994]
9. In a closed flask of 5 litres - 1.0 g of H 2 isheated from 300 to 600 KWhich statement isnot correct? [1991]
10. Which is not true in case of an ideal gas?[1992]
11. At which one of the following temperature pressure conditions the deviation of a gas fromideal behaviour is expected to be minimum?[1996]
12. A gaseous mixture contains H 2 and O2 in themolar ratio 8:1 .The ratio of H 2 :O2 by weight inthis mixture would be [1999]
13. When is deviation more in the behaviour ofa gas from the ideal gas equation PV= nRT?[1993]
14. If a gas expands at constant temperature - itindicates that: [2008]
15. The pressure exerted by 6.0g of methane gasin a 0.03 m3 vessel at °129C is (Atomic masses:C= 12.01 - H= 1.01 and R= 8.314 JK-“1 mol -“ )1[2010]
16. Acertain gas takes three times as long toeffuse out as heliumIts molecular mass will be:[2012]
17. At STP - 0.50 mol H 2 gas and 1.0 mol He gas[1993]
18. The root mean square speeds at STPfor thegases H 2 - N 2 - O2 and HBr are in the order: [1991]
19. A closed flask contains water in all its threestates solid - liquid and vapour at °0CIn thissituation - the average kinetic energy of watermolecules will be [1992]
20. A bubble of air is underwater attemperature °15C and the pressure 1.5 barIfthe bubble rises to the surface where thetemperature is °25C and the pressure is 1.0 bar - what will happen to the volume of the bubble?[2011]
21. Pressure remaining the same - the volume of agiven mass of an ideal gas increases for everydegree centigrade rise in temperature bydefinite fraction of its volume at [1989]
22. The surface tension of which of the following liquid is maximum? [2005]
23. The correct value of the gas constant -˜R-™ isclose to: [1992]
24. From a heated mixture of nitrogen - oxygenand carbon - two compounds (out of the manyobtained) are isolatedThe rates of diffusion ofthe two isolated compounds are almostidenticalThe two compounds are [1999]
25. Three moles of an ideal gas expandedspontaneously into vacuumThe work done willbe: [2010]

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