Physical Chemistry Questions
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![Equal volume of 0 2 N Na2SO4 and 0 1 N BaCl2 solutions are mixed together Assume that BaSO4 is completely insoluble If K H O 0 52 K kg mol what would be the normal boiling point of the resulting solution Assume molality molarity 100 15 C 100 75 C 100 091 C 100 175 C](https://media.kunduz.com/media/sug-question-candidate/20210726152039175713-3553355.jpg?w=256)
Physical Chemistry
Chemical kineticsEqual volume of 0 2 N Na2SO4 and 0 1 N BaCl2 solutions are mixed together Assume that BaSO4 is completely insoluble If K H O 0 52 K kg mol what would be the normal boiling point of the resulting solution Assume molality molarity 100 15 C 100 75 C 100 091 C 100 175 C
![9 For real gases van der Waals equation is an V2 where a and b are van der Waals constants Two sets of gases are I 0 CO H and He CH4 O and H II The gases given in set I in increasing order of b and gases given in set II in decreasing order of a are arranged below Select the correct order from the following written as P V nb n RT a I He H CO O II CH4 H O b 1 O He H CO II H O CH4 c 1 H He O CO II CH4 O H d 1 H O He CO II O CH4 H Mains 2012 10 Equal volumes of two monatomic gases A ad ssure](https://media.kunduz.com/media/sug-question-candidate/20210908132902038947-3569937.jpg?w=256)
Physical Chemistry
Surface chemistry9 For real gases van der Waals equation is an V2 where a and b are van der Waals constants Two sets of gases are I 0 CO H and He CH4 O and H II The gases given in set I in increasing order of b and gases given in set II in decreasing order of a are arranged below Select the correct order from the following written as P V nb n RT a I He H CO O II CH4 H O b 1 O He H CO II H O CH4 c 1 H He O CO II CH4 O H d 1 H O He CO II O CH4 H Mains 2012 10 Equal volumes of two monatomic gases A ad ssure
![Consider that the multistep reaction that has the overall reaction 2A 2B C D is obtained by the following mechanism A B I 21 B C X X A D What is the overall order of the reaction 09 05 fast slow fast 012](https://media.kunduz.com/media/sug-question-candidate/20210727064506502128-3288339.jpg?w=256)
Physical Chemistry
Chemical kineticsConsider that the multistep reaction that has the overall reaction 2A 2B C D is obtained by the following mechanism A B I 21 B C X X A D What is the overall order of the reaction 09 05 fast slow fast 012
![66 One of the hazards of nuclear explosion is the generation of Sr90 and Subsequent incorporation in bones This nucleide has half life of 28 1 Suppose one microgram was absorbed by a new born child how much Sr remain in his bones after 20 yr 1995 2M](https://media.kunduz.com/media/sug-question-candidate/20210727071056858274-3489668.jpg?w=256)
Physical Chemistry
Nuclear chemistry66 One of the hazards of nuclear explosion is the generation of Sr90 and Subsequent incorporation in bones This nucleide has half life of 28 1 Suppose one microgram was absorbed by a new born child how much Sr remain in his bones after 20 yr 1995 2M
![M a 40 If degree of dissociation is 0 01 of decimolar solution of weak acid HA then pK of acid is a 2 b 3 Jes 5 d 7 41 What concentration of HCOO is present in 1 8 x 107 a solution of 0 01 M HCOOH Ka](https://media.kunduz.com/media/sug-question-candidate/20210624065747808388-2165751.jpg?w=256)
Physical Chemistry
EquilibriumM a 40 If degree of dissociation is 0 01 of decimolar solution of weak acid HA then pK of acid is a 2 b 3 Jes 5 d 7 41 What concentration of HCOO is present in 1 8 x 107 a solution of 0 01 M HCOOH Ka
![Calculate the enthalpy change on fusion of 1 mol of ice at 5 C to water at 5 C Given AH 6 03 kJ mol at 0 C Cp H O 0 75 3J mol K Cp H O s 36 8 Jmol K 1 6 59 kJ mol 6 59 kJ mol 3 ALLI 3 29 kl mol](https://media.kunduz.com/media/sug-question-candidate/20210727062108643091-2618524.jpg?w=256)
Physical Chemistry
EquilibriumCalculate the enthalpy change on fusion of 1 mol of ice at 5 C to water at 5 C Given AH 6 03 kJ mol at 0 C Cp H O 0 75 3J mol K Cp H O s 36 8 Jmol K 1 6 59 kJ mol 6 59 kJ mol 3 ALLI 3 29 kl mol
![4 they The cations having same size and charge one having n 1 d ns configuration possess more polarising power because is 1 It is d bolock element 3 It has effective shielding of d electrons 2 It has inert gas configuration 4 it has more Zeff due to poor shielding of d electrons MOLECULAR STRUCTURE](https://media.kunduz.com/media/sug-question-candidate/20210624042521085697-3231491.jpg?w=256)
Physical Chemistry
Nuclear chemistry4 they The cations having same size and charge one having n 1 d ns configuration possess more polarising power because is 1 It is d bolock element 3 It has effective shielding of d electrons 2 It has inert gas configuration 4 it has more Zeff due to poor shielding of d electrons MOLECULAR STRUCTURE
![The specific rotation of enantiomer A is 87 3 A mixture of enantiomer A and A the enantiomer of A is subjected to polarimetry and an observed rotation of 34 2 is obtained what is the EE for this mixture 39 2 A 60 8 A 39 2 A](https://media.kunduz.com/media/sug-question-candidate/20210624031612716320-3156303.jpg?w=256)
Physical Chemistry
GeneralThe specific rotation of enantiomer A is 87 3 A mixture of enantiomer A and A the enantiomer of A is subjected to polarimetry and an observed rotation of 34 2 is obtained what is the EE for this mixture 39 2 A 60 8 A 39 2 A
![ow is 2nd statement true 3 pr 9 Function of salt bridge is are a It completes the cell circuit b It allows the movement of ions from one solution to other without mixing of the two solutions c It maintains the electrical neutrality of the solution in two half cells NCERT Pg 66 1 a b 3 Only a 2 a b c 4 b c](https://media.kunduz.com/media/sug-question-candidate/20210624065036514896-3488620.jpg?w=256)
Physical Chemistry
Electrochemistryow is 2nd statement true 3 pr 9 Function of salt bridge is are a It completes the cell circuit b It allows the movement of ions from one solution to other without mixing of the two solutions c It maintains the electrical neutrality of the solution in two half cells NCERT Pg 66 1 a b 3 Only a 2 a b c 4 b c
![If the density of ethanol is 0 78 kg L then volume of ethanol he making 2 L of 0 5 M solution is Options 45 2 mL 58 97 mL 71 4 mL 25 5 mL Solution Answer 2 NCERT Reference Some basic concepts of chemistry XI Part 1 Page No 26](https://media.kunduz.com/media/sug-question-candidate/20210908141157768396-3230348.jpg?w=256)
Physical Chemistry
SolutionsIf the density of ethanol is 0 78 kg L then volume of ethanol he making 2 L of 0 5 M solution is Options 45 2 mL 58 97 mL 71 4 mL 25 5 mL Solution Answer 2 NCERT Reference Some basic concepts of chemistry XI Part 1 Page No 26
![Given O2 g 20 g NO g O3 g NO2 g O2 g 302 g 203 g What is the standard reaction enthalpy for the following reaction NO g O g NO2 g O 355 kJ mol O 555 kJ mol 306 kJ mol 592 kJ mol 306 5 kJ mol AH 498 4 kJ mol AH 200 0 kJ mol AH 285 4 kJ mol](https://media.kunduz.com/media/sug-question-candidate/20210727061326466567-3288339.jpg?w=256)
Physical Chemistry
GeneralGiven O2 g 20 g NO g O3 g NO2 g O2 g 302 g 203 g What is the standard reaction enthalpy for the following reaction NO g O g NO2 g O 355 kJ mol O 555 kJ mol 306 kJ mol 592 kJ mol 306 5 kJ mol AH 498 4 kJ mol AH 200 0 kJ mol AH 285 4 kJ mol
![37 A 0 10 M solution of HF is 8 0 dissociated What is the K a 6 4 x 10 4 b 8 8 x 10 4 c 6 95 x 10 d 7 6 x 10 38 A weak base MOH of 0 1 N concentration shows a pH value of 9 What is the p](https://media.kunduz.com/media/sug-question-candidate/20210624065652871180-2165751.jpg?w=256)
Physical Chemistry
Equilibrium37 A 0 10 M solution of HF is 8 0 dissociated What is the K a 6 4 x 10 4 b 8 8 x 10 4 c 6 95 x 10 d 7 6 x 10 38 A weak base MOH of 0 1 N concentration shows a pH value of 9 What is the p
![61 The following equilibrium are given N 3H 2NH3 K N 0 K H 1 1 20 2 H O K The equilibrium constant of the reaction 2NO 3H O in terms 2NH3 5 2 0 of K K and K is K K A K 2NO B 2 K K K C K K3 K D K K K 1 1](https://media.kunduz.com/media/sug-question-candidate/20210726190333831371-712522.jpg?w=256)
Physical Chemistry
Equilibrium61 The following equilibrium are given N 3H 2NH3 K N 0 K H 1 1 20 2 H O K The equilibrium constant of the reaction 2NO 3H O in terms 2NH3 5 2 0 of K K and K is K K A K 2NO B 2 K K K C K K3 K D K K K 1 1
![Number of atoms in 0 2 g molecule Br308 is molar mass of Br308 is 368 g mol 0 22 NA 2 2 NA 0 2 NA 0 2 368 Read More x11NA only one is correct](https://media.kunduz.com/media/sug-question-candidate/20210727075350824673-2318975.jpg?w=256)
Physical Chemistry
GeneralNumber of atoms in 0 2 g molecule Br308 is molar mass of Br308 is 368 g mol 0 22 NA 2 2 NA 0 2 NA 0 2 368 Read More x11NA only one is correct
![During electrolysis of aq NaCl using Pt electrodes variable source 20 current is used where t Current is passed for 965 second 965 then select the correct statement s Take 1 F 96500 C mol Number of moles of H gas evolved is 0 05 Number of moles of O gas evolved is 0 025 Number of moles of Cl gas evolved is 0 05 Number of moles of Cl gas evolved is 0 025](https://media.kunduz.com/media/sug-question-candidate/20210726163730291401-3549892.jpg?w=256)
Physical Chemistry
ElectrochemistryDuring electrolysis of aq NaCl using Pt electrodes variable source 20 current is used where t Current is passed for 965 second 965 then select the correct statement s Take 1 F 96500 C mol Number of moles of H gas evolved is 0 05 Number of moles of O gas evolved is 0 025 Number of moles of Cl gas evolved is 0 05 Number of moles of Cl gas evolved is 0 025
![During electrolysis of aq CH COONa solution current of 965 A is passed for 10 second using Pt electrodes select the correct statement s Take 1 F 96500 C mol 01 12 L of H gas at STP is evolved at cathode C He gas evolved at anode If the hydrocarbon gas evolved at anode is burnt with excess of O the moles of CO gas evolved is 0 2 During electrolysis total moles of gases evolved in 0 2](https://media.kunduz.com/media/sug-question-candidate/20210727012929391021-2383572.jpg?w=256)
Physical Chemistry
ElectrochemistryDuring electrolysis of aq CH COONa solution current of 965 A is passed for 10 second using Pt electrodes select the correct statement s Take 1 F 96500 C mol 01 12 L of H gas at STP is evolved at cathode C He gas evolved at anode If the hydrocarbon gas evolved at anode is burnt with excess of O the moles of CO gas evolved is 0 2 During electrolysis total moles of gases evolved in 0 2
![In fcc arrangement the distance between adjacent layers of close packing is 81 65 pm then the smallest possible radius of a foreign atom that can be placed in a void is 50 00 pm](https://media.kunduz.com/media/sug-question-candidate/20210726163529089972-3549892.jpg?w=256)
Physical Chemistry
Solid stateIn fcc arrangement the distance between adjacent layers of close packing is 81 65 pm then the smallest possible radius of a foreign atom that can be placed in a void is 50 00 pm
![2 The wavelength of photon obtained by electron transition between two levels in H atom and singly ionised He are and respectively then 1 2 2 3 2 2 2 4 2 4](https://media.kunduz.com/media/sug-question-candidate/20210727065255459615-2917066.jpg?w=256)
Physical Chemistry
Atomic Structure2 The wavelength of photon obtained by electron transition between two levels in H atom and singly ionised He are and respectively then 1 2 2 3 2 2 2 4 2 4
![2FAF5 AF3 For the above change which statement is correct 1 Central atom A belongs to 15th group 2 In each step two coordinate bonds are formed 2F AF7 III 3 Central atom A has five electron in p subshell of its valence she 4 No such change is possible](https://media.kunduz.com/media/sug-question-candidate/20210624064358182321-3231491.jpg?w=256)
Physical Chemistry
General2FAF5 AF3 For the above change which statement is correct 1 Central atom A belongs to 15th group 2 In each step two coordinate bonds are formed 2F AF7 III 3 Central atom A has five electron in p subshell of its valence she 4 No such change is possible
![The low boiling azeotrope is a mixture of two miscible liquids that when boiled produce the same composition in the vapor phase a is a vertical line form the vapor phase to the liquid phase O b OC is a mixture of two miscible liquids that when boiled produce the different composition in the vapor phase O d 1s is a mixture of two immiscible liquids that when heated becomes completely miscible](https://media.kunduz.com/media/sug-question-candidate/20210624050218613969-3484709.jpg?w=256)
Physical Chemistry
SolutionsThe low boiling azeotrope is a mixture of two miscible liquids that when boiled produce the same composition in the vapor phase a is a vertical line form the vapor phase to the liquid phase O b OC is a mixture of two miscible liquids that when boiled produce the different composition in the vapor phase O d 1s is a mixture of two immiscible liquids that when heated becomes completely miscible
![What should be the momentum in gram centimetre per second of a particle if its de Broglie wavelength is 1 and the value of h is 6 6252 x 10 27 erg second 1 6 6252 x 10 19 gcm s 2 6 6252 x 10 21 gcm s 3 6 6252 x 10 24 gcm s 4 6 6252 x 10 27 gcm s](https://media.kunduz.com/media/sug-question-candidate/20210726185516306973-2917066.jpg?w=256)
Physical Chemistry
Surface chemistryWhat should be the momentum in gram centimetre per second of a particle if its de Broglie wavelength is 1 and the value of h is 6 6252 x 10 27 erg second 1 6 6252 x 10 19 gcm s 2 6 6252 x 10 21 gcm s 3 6 6252 x 10 24 gcm s 4 6 6252 x 10 27 gcm s
![A graph is plotted between the vapour pressure and mole fraction of a solution containing benzene and toluene Choose the correct options 80 Liquid L Pressure mmHg 60 40 20 0 0 0 2 L V b Vapour V 0 4 0 6 0 8 1 0 X benzene a At the point a the mole fraction of toluene is 0 80 b b c represents condensation c c d represents vapourization YO d c d represents vapourization as well as condensation](https://media.kunduz.com/media/sug-question-candidate/20210727052412011889-3446409.jpg?w=256)
Physical Chemistry
Chemical kineticsA graph is plotted between the vapour pressure and mole fraction of a solution containing benzene and toluene Choose the correct options 80 Liquid L Pressure mmHg 60 40 20 0 0 0 2 L V b Vapour V 0 4 0 6 0 8 1 0 X benzene a At the point a the mole fraction of toluene is 0 80 b b c represents condensation c c d represents vapourization YO d c d represents vapourization as well as condensation
![7 An ideal gas can t be liquefied because a its critical temperature is always above 0 b its molecules are relatively smaller in size c it solidifies before becoming a liquid d forces operative between its molecules are negligible 1992](https://media.kunduz.com/media/sug-question-candidate/20210908132826996025-3569937.jpg?w=256)
Physical Chemistry
Gaseous and liquid states7 An ideal gas can t be liquefied because a its critical temperature is always above 0 b its molecules are relatively smaller in size c it solidifies before becoming a liquid d forces operative between its molecules are negligible 1992
![In the electrolysis of KI I is formed at the anode by the reaction 2 1 2e After the passage of current of 0 5 ampere for 9650 seconds I formed required 40 ml of 0 2 M Na S O3 5H O solution in the reaction 12 25 03 What is the percentage current efficiency 16 48 32 21](https://media.kunduz.com/media/sug-question-candidate/20210726204102032117-3549892.jpg?w=256)
Physical Chemistry
GeneralIn the electrolysis of KI I is formed at the anode by the reaction 2 1 2e After the passage of current of 0 5 ampere for 9650 seconds I formed required 40 ml of 0 2 M Na S O3 5H O solution in the reaction 12 25 03 What is the percentage current efficiency 16 48 32 21
![2 3 moles of a certain gas are confined in a cylinder Calculate the expansion work when the gas expands isothermally and reversibly from an initial vol of 0 5L to a final volume of 2 5L at 30 C O a 92 03 kJ O b 92 03 kJ Oc 9 3kJ O d 3 7 kJ](https://media.kunduz.com/media/sug-question-candidate/20210624050525275933-3484709.jpg?w=256)
Physical Chemistry
General2 3 moles of a certain gas are confined in a cylinder Calculate the expansion work when the gas expands isothermally and reversibly from an initial vol of 0 5L to a final volume of 2 5L at 30 C O a 92 03 kJ O b 92 03 kJ Oc 9 3kJ O d 3 7 kJ
![If the standard enthalpy of combustion of solid phenol is 3054 kJ mol at 298 K and its standard molar entropy is 144 0 JK 1 mol 1 then the standard Gibbs energy of combustion of phenol is O a A Go 3084 kJ mol Ob A GO Oc A G Od4cG 3077 kJ mol 1 3074 kJ mol 3097 kJ mol 1](https://media.kunduz.com/media/sug-question-candidate/20210624050235314112-3484709.jpg?w=256)
Physical Chemistry
EnergeticsIf the standard enthalpy of combustion of solid phenol is 3054 kJ mol at 298 K and its standard molar entropy is 144 0 JK 1 mol 1 then the standard Gibbs energy of combustion of phenol is O a A Go 3084 kJ mol Ob A GO Oc A G Od4cG 3077 kJ mol 1 3074 kJ mol 3097 kJ mol 1
![Assuming the vapour pressure of water is increased from 30 to 31 mm Hg at 25 C against an external pressure of 10 atm If the vapour pressure is to be maintained at 30 mm Hg for 1 L of water 55 5 moles at 25 C and 10 atm pressure how much NaCl in moles is to be added to the water 0 765](https://media.kunduz.com/media/sug-question-candidate/20210726163317800637-3549892.jpg?w=256)
Physical Chemistry
SolutionsAssuming the vapour pressure of water is increased from 30 to 31 mm Hg at 25 C against an external pressure of 10 atm If the vapour pressure is to be maintained at 30 mm Hg for 1 L of water 55 5 moles at 25 C and 10 atm pressure how much NaCl in moles is to be added to the water 0 765
![13 10 Suppose you need to know the number of moles of a gas from measurements of its pressure temperature and volume We assume that the gas is ideal a possible source of systematic error Perhaps our measurements of P V and T are P 0 268 0 012 atm V 1 26 0 05 L T 294 2 0 3 K R 0 082058 L atm K mol Report the number of moles of gas with uncertainty Use the calculus based approach](https://media.kunduz.com/media/sug-question-candidate/20210908160123360791-3522319.jpg?w=256)
Physical Chemistry
Atomic Structure13 10 Suppose you need to know the number of moles of a gas from measurements of its pressure temperature and volume We assume that the gas is ideal a possible source of systematic error Perhaps our measurements of P V and T are P 0 268 0 012 atm V 1 26 0 05 L T 294 2 0 3 K R 0 082058 L atm K mol Report the number of moles of gas with uncertainty Use the calculus based approach
![ic species 5 Which is incorrect statement 1 N has greater dissociation energy than N 2 O has lower dissociation energy than 0 O 3 Bond length in N is less than N 4 Bond length in NO is less than in NO](https://media.kunduz.com/media/sug-question-candidate/20210908122344597604-3495227.jpg?w=256)
Physical Chemistry
Generalic species 5 Which is incorrect statement 1 N has greater dissociation energy than N 2 O has lower dissociation energy than 0 O 3 Bond length in N is less than N 4 Bond length in NO is less than in NO
![d P is the pressure of the gas when only one mole of gas is present Pure hydrogen sulphide is stored in a tank of 100 litre capacity at 20 C and 2 atm pressure The mass of the gas will be a 34 g b 340 g c 282 68 g d 28 24 g A weather balloon filled with hydrogen at 1 atm and 27 C has volume equal to 12000 litres On](https://media.kunduz.com/media/sug-question-candidate/20210727035159750652-2497626.jpg?w=256)
Physical Chemistry
Energeticsd P is the pressure of the gas when only one mole of gas is present Pure hydrogen sulphide is stored in a tank of 100 litre capacity at 20 C and 2 atm pressure The mass of the gas will be a 34 g b 340 g c 282 68 g d 28 24 g A weather balloon filled with hydrogen at 1 atm and 27 C has volume equal to 12000 litres On
![Calculate the heat produced in kJ when 224 gm of CaO is completely converted to CaCO3 by reaction with CO at 27 C in a container of fixed volume Given AH CaCO3 s 1207 kJ mol AH CaO s 635 kJ mol AH CO g 394 kJ mol Use R 8 3 J K mol 85 702 04 kJ 2 721 96 kJ 3 712 kJ](https://media.kunduz.com/media/sug-question-candidate/20210727062049872516-2618524.jpg?w=256)
Physical Chemistry
EnergeticsCalculate the heat produced in kJ when 224 gm of CaO is completely converted to CaCO3 by reaction with CO at 27 C in a container of fixed volume Given AH CaCO3 s 1207 kJ mol AH CaO s 635 kJ mol AH CO g 394 kJ mol Use R 8 3 J K mol 85 702 04 kJ 2 721 96 kJ 3 712 kJ
![The decomposition of a certain mass of CaCO3 gave 11 2 dm of CO gas at STP The mass of KOH required to complete neutralise the gas is 1 28 g 2 56 g 3 14g 4 1 2 g The Vividh Bharti Station of All Indian Radio](https://media.kunduz.com/media/sug-question-candidate/20210727062120212574-2618524.jpg?w=256)
Physical Chemistry
GeneralThe decomposition of a certain mass of CaCO3 gave 11 2 dm of CO gas at STP The mass of KOH required to complete neutralise the gas is 1 28 g 2 56 g 3 14g 4 1 2 g The Vividh Bharti Station of All Indian Radio
![Equal volume of 0 2 N Na SO4 and 0 1 N BaCl solutions are mixed together Assume that BaSO4 is completely insoluble If Ku H O 0 52 K kg mol what would be the normal boiling point of the resulting solution Assume molality molarity O 100 15 C O100 75 C 100 091 C 100 175 C](https://media.kunduz.com/media/sug-question-candidate/20210727011330454281-2383572.jpg?w=256)
Physical Chemistry
GeneralEqual volume of 0 2 N Na SO4 and 0 1 N BaCl solutions are mixed together Assume that BaSO4 is completely insoluble If Ku H O 0 52 K kg mol what would be the normal boiling point of the resulting solution Assume molality molarity O 100 15 C O100 75 C 100 091 C 100 175 C
![During electrolysis of H SO4 aq with high charge density Marshall s acid formed as a by product In such electrolysis 22 4 L H g and 5 6 L O g liberated at STP at electrode The number of moles of Marshall s acid formed is x the value of x is 1 0 25 2 0 5](https://media.kunduz.com/media/sug-question-candidate/20210726204255535750-3549892.jpg?w=256)
Physical Chemistry
GeneralDuring electrolysis of H SO4 aq with high charge density Marshall s acid formed as a by product In such electrolysis 22 4 L H g and 5 6 L O g liberated at STP at electrode The number of moles of Marshall s acid formed is x the value of x is 1 0 25 2 0 5
![35 Four lowest energy levels of H atom are shown in the figure The number of emission lines could be 1 3 2 4 3 5 4 6 4 432 95 n 1 In the above problem the number of absorption lines could be t 1 3 2 4 3 5 4 6](https://media.kunduz.com/media/sug-question-candidate/20210726191021089561-2917066.jpg?w=256)
Physical Chemistry
Atomic Structure35 Four lowest energy levels of H atom are shown in the figure The number of emission lines could be 1 3 2 4 3 5 4 6 4 432 95 n 1 In the above problem the number of absorption lines could be t 1 3 2 4 3 5 4 6
![16 The energy absorbed by each molecule A 23 The of a substance is 4 4 x 10 19 J and bond energy per molecule is 4 0 10 19 J The kinetic energy of the molecule per atom will be a 2 2 10 9 J c 4 0 10 20 J b 2 0 10 9 J d 2 0 10 20 J 2009 7 If a gas expands at constant temperature it per r a c 24 At w N w at 50](https://media.kunduz.com/media/sug-question-candidate/20210908132838777014-3569937.jpg?w=256)
Physical Chemistry
General16 The energy absorbed by each molecule A 23 The of a substance is 4 4 x 10 19 J and bond energy per molecule is 4 0 10 19 J The kinetic energy of the molecule per atom will be a 2 2 10 9 J c 4 0 10 20 J b 2 0 10 9 J d 2 0 10 20 J 2009 7 If a gas expands at constant temperature it per r a c 24 At w N w at 50
![When equal volumes of methanol CH3OH and water are mixed the temperature increases a What does this observation tell you about the value of H of mixing b Let s assume that hydrogen bonding is the only energetically significant non covalent interaction in both the pure liquids and in the mixture Based on your answer in part a will the total number of hydrogen bonds in the mixture be higher or lower than in the separate liquids Explain c If we have infinite time to observe the mixture will we ever see it revert to the](https://media.kunduz.com/media/sug-question-candidate/20210908155003544978-1884794.jpg?w=256)
Physical Chemistry
EnergeticsWhen equal volumes of methanol CH3OH and water are mixed the temperature increases a What does this observation tell you about the value of H of mixing b Let s assume that hydrogen bonding is the only energetically significant non covalent interaction in both the pure liquids and in the mixture Based on your answer in part a will the total number of hydrogen bonds in the mixture be higher or lower than in the separate liquids Explain c If we have infinite time to observe the mixture will we ever see it revert to the
![A monatomic ideal gas is the working substance for a refrigerator that undergoes the cyclic process ABCDA shown in the PV diagram The processes are all isochoric or isobaric with pressures between P and 2P and volumes between V and 2V What is the coefficient of performance for this refrigerator P 2P Po](https://media.kunduz.com/media/sug-question-candidate/20210623144502038671-3520581.jpg?w=256)
Physical Chemistry
EnergeticsA monatomic ideal gas is the working substance for a refrigerator that undergoes the cyclic process ABCDA shown in the PV diagram The processes are all isochoric or isobaric with pressures between P and 2P and volumes between V and 2V What is the coefficient of performance for this refrigerator P 2P Po
![37 At 727 C N g 3H g 2NH g AH 123 77 N NH 3 5R 4R Substance H 3 5R C The heat of formation of ammonia at in kJ mol at 270 a 44 42 b 44 42 c 88 85 d 88 85 a a C 45 C](https://media.kunduz.com/media/sug-question-candidate/20210908121116557909-3607514.jpg?w=256)
Physical Chemistry
General37 At 727 C N g 3H g 2NH g AH 123 77 N NH 3 5R 4R Substance H 3 5R C The heat of formation of ammonia at in kJ mol at 270 a 44 42 b 44 42 c 88 85 d 88 85 a a C 45 C
![5 What is the correct representation of reaction occurring when HCI is heated with MnO 1 MnO4 5CI 8H 2 MnO 2Cl 4H 3 2MnO 4Cl 8H 4 MnO 4HCI Mn2 5Cl 5H 0 Mn2 Cl 2H O 2Mn 2Cl 4H O MnCl4 Cl H O](https://media.kunduz.com/media/sug-question-candidate/20210727020322360328-3553077.jpg?w=256)
Physical Chemistry
Atomic Structure5 What is the correct representation of reaction occurring when HCI is heated with MnO 1 MnO4 5CI 8H 2 MnO 2Cl 4H 3 2MnO 4Cl 8H 4 MnO 4HCI Mn2 5Cl 5H 0 Mn2 Cl 2H O 2Mn 2Cl 4H O MnCl4 Cl H O
![c AG 0 AS 0 d AG 0 AS 0 52 The enthalpy of formation of ammonia is 46 0 kJ mol The enthalpy for the reaction 2N g 6H g 4 NH3 g is equal to a 46 0 kJ b 46 0 kJ c 184 0 kJ d 184 0 kJ](https://media.kunduz.com/media/sug-question-candidate/20210908120954054232-3607514.jpg?w=256)
Physical Chemistry
Energeticsc AG 0 AS 0 d AG 0 AS 0 52 The enthalpy of formation of ammonia is 46 0 kJ mol The enthalpy for the reaction 2N g 6H g 4 NH3 g is equal to a 46 0 kJ b 46 0 kJ c 184 0 kJ d 184 0 kJ
![gives the energy of the electron in orbital d Both a b 39 Consider the following sets of quantum number 1 0 ii iii iv v n 3 2 4 1 3 2 3 0 2 m 0 1 2 1 3 S 1 2 1 2 1 2 1 2 1 2 Which of the following sets of quantum number is not possible a i ii iii and iv b ii iv and v c i and iii d ii iii and iv](https://media.kunduz.com/media/sug-question-candidate/20210908075231395876-2662149.jpg?w=256)
Physical Chemistry
Generalgives the energy of the electron in orbital d Both a b 39 Consider the following sets of quantum number 1 0 ii iii iv v n 3 2 4 1 3 2 3 0 2 m 0 1 2 1 3 S 1 2 1 2 1 2 1 2 1 2 Which of the following sets of quantum number is not possible a i ii iii and iv b ii iv and v c i and iii d ii iii and iv
![33 When is deviation more in the behaviour of a gas from the ideal gas equation PV nRT a At high temperature and low pressure b At low temperature and high pressure c At high temperature and high pressure d At low temperature and low pressure 1993 A closed flack contains water in all its three](https://media.kunduz.com/media/sug-question-candidate/20210908132803999889-3569937.jpg?w=256)
Physical Chemistry
Gaseous and liquid states33 When is deviation more in the behaviour of a gas from the ideal gas equation PV nRT a At high temperature and low pressure b At low temperature and high pressure c At high temperature and high pressure d At low temperature and low pressure 1993 A closed flack contains water in all its three
![60 Al O is reduced by electrolysis at low potential and high current If 4 0 x 104 amperes of current is passed through molten Al O for 6 hours what mass of aluminium is produced Assume 100 current efficiency At mass of Al 27g mol A 1 3 x 104 g C 8 1 x 104 g B 9 0 x 10 g D 2 4 x 105 g](https://media.kunduz.com/media/sug-question-candidate/20210726190308112392-712522.jpg?w=256)
Physical Chemistry
General60 Al O is reduced by electrolysis at low potential and high current If 4 0 x 104 amperes of current is passed through molten Al O for 6 hours what mass of aluminium is produced Assume 100 current efficiency At mass of Al 27g mol A 1 3 x 104 g C 8 1 x 104 g B 9 0 x 10 g D 2 4 x 105 g
![a mixture that possesses chiral center s and is optically active a mixture that possesses chiral center s but is optically inactive None of the above a pure compound that possesses chiral center s but is optically inactive](https://media.kunduz.com/media/sug-question-candidate/20210624013241246749-3156303.jpg?w=256)
Physical Chemistry
Generala mixture that possesses chiral center s and is optically active a mixture that possesses chiral center s but is optically inactive None of the above a pure compound that possesses chiral center s but is optically inactive
![What is the change in chemical potential of a perfect gas when its pressure is increased isothermally from 92 0 kPa to 252 0 kPa at 50 C 2 71 kJ mol a b c d 4 5 kJ mol 3 1 kJ mol 71 kJ mol](https://media.kunduz.com/media/sug-question-candidate/20210624051130601732-3484709.jpg?w=256)
Physical Chemistry
EnergeticsWhat is the change in chemical potential of a perfect gas when its pressure is increased isothermally from 92 0 kPa to 252 0 kPa at 50 C 2 71 kJ mol a b c d 4 5 kJ mol 3 1 kJ mol 71 kJ mol
![ecre CI O S O OPCI O P O 4 g oxygen expand at STP to its original volume Then work don 1 260 cal 2 180 cal 3 130 cal 4 272 8 cal 7 Which of the following is displaced by Fe 2 Zn 4 All of these Which of the following will not give ether as product 1 Ag 3 Na 68 CH CH I CU ZONS CH 00 ONa JONa CH CH CH So](https://media.kunduz.com/media/sug-question-candidate/20210908110313030766-3495227.jpg?w=256)
Physical Chemistry
Generalecre CI O S O OPCI O P O 4 g oxygen expand at STP to its original volume Then work don 1 260 cal 2 180 cal 3 130 cal 4 272 8 cal 7 Which of the following is displaced by Fe 2 Zn 4 All of these Which of the following will not give ether as product 1 Ag 3 Na 68 CH CH I CU ZONS CH 00 ONa JONa CH CH CH So
![Name the substance oxidized and redu ced and also identify the oxidizing agen ts and reducing agents in the following reaction 1 Fe203 3Co 2Fe 3Co2 2 3MnO2 4AI 3Mn 2Al203 3 H2S SO2 S H2O](https://media.kunduz.com/media/sug-question-candidate/20210624051906225912-3514195.jpg?w=256)
Physical Chemistry
Atomic StructureName the substance oxidized and redu ced and also identify the oxidizing agen ts and reducing agents in the following reaction 1 Fe203 3Co 2Fe 3Co2 2 3MnO2 4AI 3Mn 2Al203 3 H2S SO2 S H2O
![1 Pro Madical 2021 TT 4 19 08 2021 2 For an elementary reaction A 2B C the initial pressure of A and B are 0 5 and 1 0 atm respectively if after time t the pressure of A becomes 0 2 atm what is the ratio of rate I G 1 16 250 2 25 16 5 3 16 16 4 5](https://media.kunduz.com/media/sug-question-candidate/20210908113616769117-3495227.jpg?w=256)
Physical Chemistry
Chemical kinetics1 Pro Madical 2021 TT 4 19 08 2021 2 For an elementary reaction A 2B C the initial pressure of A and B are 0 5 and 1 0 atm respectively if after time t the pressure of A becomes 0 2 atm what is the ratio of rate I G 1 16 250 2 25 16 5 3 16 16 4 5
![Column I contains different lattice types and column II different operations and properties of lattice Match the column I with column II Column I Q1 NaCl type lattice Q2 CsCl type lattice Q3 Na O type lattice Q4 CaF2 type lattice Column II A1 If all the ions along one of the C 4 axis are removed then the formula of lattice will be AB A2 If all the ions along one of the C 4 axis are removed then the lattice will lose all the cations A3 a 2 3 r r A4 Coordination number of at least one ion is 4 A5 If all the ions along one of the C 4 axis are removed then the lattice will become positively](https://media.kunduz.com/media/sug-question-candidate/20210726204612633660-3553355.jpg?w=256)
Physical Chemistry
Solid stateColumn I contains different lattice types and column II different operations and properties of lattice Match the column I with column II Column I Q1 NaCl type lattice Q2 CsCl type lattice Q3 Na O type lattice Q4 CaF2 type lattice Column II A1 If all the ions along one of the C 4 axis are removed then the formula of lattice will be AB A2 If all the ions along one of the C 4 axis are removed then the lattice will lose all the cations A3 a 2 3 r r A4 Coordination number of at least one ion is 4 A5 If all the ions along one of the C 4 axis are removed then the lattice will become positively