States of Matter
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States of Matter
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25 Questions

1. 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]
2. If P - V - M - Tand Rare pressure - Volume - molarmass - temperatureandgasconstantrespectively - then for an ideal gas - the density isgiven by [1989]
3. At which one of the following temperature pressure conditions the deviation of a gas fromideal behaviour is expected to be minimum?[1996]
4. 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]
5. Van der Waal\'s real gas - act as an ideal gas - at which conditions? [2002]
6. Acertain gas takes three times as long toeffuse out as heliumIts molecular mass will be:[2012]
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. 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]
9. 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]
10. Three moles of an ideal gas expandedspontaneously into vacuumThe work done willbe: [2010]
11. In a pair of immiscible liquids - a commonsolute dissolves in both and the equilibrium isreachedThen the concentration of the solute inupper layer is [1994]
12. 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]
13. When is deviation more in the behaviour ofa gas from the ideal gas equation PV= nRT?[1993]
14. 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]
15. 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]
16. Dipole-induced dipole interactions arepresent in which of the following pairs: [2013]
17. At STP - 0.50 mol H 2 gas and 1.0 mol He gas[1993]
18. Absolute zero is defined as the temperature[1990]
19. What is the density of N 2 gas at 227°C and5.00 atm pressure? (R= 0.0821 atm K -“1 mol-“1)[2013]
20. Root mean square velocity of a gas molecule isproportional to [1990]
21. If a gas expands at constant temperature - itindicates that: [2008]
22. The correct value of the gas constant -˜R-™ isclose to: [1992]
23. 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]
24. 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]
25. By what factor does the average velocity of agaseousmoleculeincreasewhen thetemperature (in Kelvin) is doubled? [2011]

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