States of Matter
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States of Matter
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25 Questions

1. The surface tension of which of the following liquid is maximum? [2005]
2. 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]
3. At STP - 0.50 mol H 2 gas and 1.0 mol He gas[1993]
4. Three moles of an ideal gas expandedspontaneously into vacuumThe work done willbe: [2010]
5. Aliquid can exist only: [1994]
6. 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]
7. When is deviation more in the behaviour ofa gas from the ideal gas equation PV= nRT?[1993]
8. At which one of the following temperature pressure conditions the deviation of a gas fromideal behaviour is expected to be minimum?[1996]
9. Root mean square velocity of a gas molecule isproportional to [1990]
10. 600 c.cof a gas at a pressure of 750 mm iscompressed to 500 c.cTaking the temperatureto remain constant - the increase in pressure - is[1995]
11. Absolute zero is defined as the temperature[1990]
12. In a pair of immiscible liquids - a commonsolute dissolves in both and the equilibrium isreachedThen the concentration of the solute inupper layer is [1994]
13. 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]
14. An ideal gas can-™t be liquefied because[1992]
15. 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]
16. Acertain gas takes three times as long toeffuse out as heliumIts molecular mass will be:[2012]
17. Cyclopropane and oxygen at partialpressures 170 torr and 570 torr respectively aremixed in a gas cylinderWhat is the ratio of thenumber of moles of cyclopropane to the numberof moles of oxygen (nC 3H6/ nO2) ? [1996]29If 500 ml of gas Aat 400 torr and 666.6 ml ofBat 600 torr are placed in a 3 litre flask - thepressure of the system will be [1999]
18. By what factor does the average velocity of agaseousmoleculeincreasewhen thetemperature (in Kelvin) is doubled? [2011]
19. Dipole-induced dipole interactions arepresent in which of the following pairs: [2013]
20. 500 ml of nitrogen at °27C is cooled to -“°5Cat the same pressureThe new volume becomes[1995]
21. If a gas expands at constant temperature - itindicates that: [2008]
22. The correct value of the gas constant -˜R-™ isclose to: [1992]
23. If P - V - M - Tand Rare pressure - Volume - molarmass - temperatureandgasconstantrespectively - then for an ideal gas - the density isgiven by [1989]
24. Which is not true in case of an ideal gas?[1992]
25. Agaseous mixture was prepared by takingequal mole of CO and N 2 .If the total pressure ofthe mixture was found 1 atmosphere - the partialpressure of the nitrogen (N 2) in the mixture is:[2011]

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