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States of Matter
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States of Matter
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25 Questions

1. 50 mL of each gas Aand of gas Btakes 150and 200 seconds respectively for effusingthrough a pin hole under the similar conditionIfmolecular mass of gas Bis 36 - the molecularmass of gas Awill be: [2012]
2. Aliquid can exist only: [1994]
3. Select one correct statementIn the gasequation - PV= nRT [1992]
4. 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]
5. By what factor does the average velocity of agaseousmoleculeincreasewhen thetemperature (in Kelvin) is doubled? [2011]
6. At constant temperature - for a given mass ofan ideal gas [1991]
7. 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]
8. The correct value of the gas constant -˜R-™ isclose to: [1992]
9. In a pair of immiscible liquids - a commonsolute dissolves in both and the equilibrium isreachedThen the concentration of the solute inupper layer is [1994]
10. 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]
11. Three moles of an ideal gas expandedspontaneously into vacuumThe work done willbe: [2010]
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. In a closed flask of 5 litres - 1.0 g of H 2 isheated from 300 to 600 KWhich statement isnot correct? [1991]
14. 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]
15. What is the density of N 2 gas at 227°C and5.00 atm pressure? (R= 0.0821 atm K -“1 mol-“1)[2013]
16. The root mean square speeds at STPfor thegases H 2 - N 2 - O2 and HBr are in the order: [1991]
17. 500 ml of nitrogen at °27C is cooled to -“°5Cat the same pressureThe new volume becomes[1995]
18. 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]
19. Maximum deviation from ideal gas isexpected from: [2013]
20. 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]
21. When is deviation more in the behaviour ofa gas from the ideal gas equation PV= nRT?[1993]
22. Root mean square velocity of a gas molecule isproportional to [1990]
23. At STP - 0.50 mol H 2 gas and 1.0 mol He gas[1993]
24. 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]
25. The surface tension of which of the following liquid is maximum? [2005]

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