General Questions and Answers
![3 A mixture of 0 5 mole of CO and 0 5 mole of CO is taken in a vessel and allowed to effuse out through a pinhole into another vessel which has vacuum If a total of A mole has effused out in time t show that M A M 1 A 36 where M and M are mean molar masses of the mixture that has effused out and the mixture still remaining in vessel respectively](https://media.kunduz.com/media/sug-question-candidate/20200712121437996894-1648442.jpg?w=256)
Physical Chemistry
General3 A mixture of 0 5 mole of CO and 0 5 mole of CO is taken in a vessel and allowed to effuse out through a pinhole into another vessel which has vacuum If a total of A mole has effused out in time t show that M A M 1 A 36 where M and M are mean molar masses of the mixture that has effused out and the mixture still remaining in vessel respectively
![In victor Mayer s method 0 2 g of a volatile compound on volatilisation gave 56 mL of vapour at STP Its molecular weight is 1 40 2 60 3 80 4 120](https://media.kunduz.com/media/sug-question-candidate/20200829220520535359-668842.jpg?w=256)
Physical Chemistry
GeneralIn victor Mayer s method 0 2 g of a volatile compound on volatilisation gave 56 mL of vapour at STP Its molecular weight is 1 40 2 60 3 80 4 120
![of its low solubility and K Cr O7 is separated What weight of chromate ore having 20 purity should be used to produce 1Kg potassi dichromate crystals A 3 81kg C 2 80kg B 1kg D 7 62kg The composition of air which is passed in Isten is 80 N and 30 For th 294](https://media.kunduz.com/media/sug-question-candidate/20200630155406870384-1866818.jpg?w=256)
Physical Chemistry
Generalof its low solubility and K Cr O7 is separated What weight of chromate ore having 20 purity should be used to produce 1Kg potassi dichromate crystals A 3 81kg C 2 80kg B 1kg D 7 62kg The composition of air which is passed in Isten is 80 N and 30 For th 294
![108 510 mg of a liquid on vapourisation in Victor Mayer s apparatus displaces 67 2 cc of dry air at NTP The molecular weight of liquid is 1 130 2 17 3 1700 4 170](https://media.kunduz.com/media/sug-question-candidate/20200829220402776750-668842.jpg?w=256)
Physical Chemistry
General108 510 mg of a liquid on vapourisation in Victor Mayer s apparatus displaces 67 2 cc of dry air at NTP The molecular weight of liquid is 1 130 2 17 3 1700 4 170
![15 A vessel of volume 8 0 x 103 m 3 contains ideal gas at 300 K and 200 kPa The gas is allowed to leak till the pressure falls to 125 kPa Calculate the mole of gas leaked out if temperature remains constant Assume ideal nature](https://media.kunduz.com/media/sug-question-candidate/20200712114206011623-1648442.jpg?w=256)
Physical Chemistry
General15 A vessel of volume 8 0 x 103 m 3 contains ideal gas at 300 K and 200 kPa The gas is allowed to leak till the pressure falls to 125 kPa Calculate the mole of gas leaked out if temperature remains constant Assume ideal nature
![Acetic acid dissociates 1 3 What will be the pH of N 10 solution of the acid A 2 066 B 1 300 C 2 086 D 2 886](https://media.kunduz.com/media/sug-question-candidate/20200807033911731574-1907219.jpg?w=256)
Physical Chemistry
GeneralAcetic acid dissociates 1 3 What will be the pH of N 10 solution of the acid A 2 066 B 1 300 C 2 086 D 2 886
![5g of pure MgO obtained by reaction of metallic magnesium with oxygen contains 3g of Mg Again 8 5 g of pure MgO obtained by heating MgCO contains 5 1g of Mg Show that these results are in accordance with the law of constant proportions](https://media.kunduz.com/media/sug-question-candidate/20200902073812507338-1978652.jpg?w=256)
Physical Chemistry
General5g of pure MgO obtained by reaction of metallic magnesium with oxygen contains 3g of Mg Again 8 5 g of pure MgO obtained by heating MgCO contains 5 1g of Mg Show that these results are in accordance with the law of constant proportions
![a Derive a relationship between molality molarity of a solution in which w g of solute of molar mass M g mol is dissolved in W g solvent density of resulting solution d g ml 1 4 g mL b Calculate molality of 1 2 M H SO4 solution If its p](https://media.kunduz.com/media/sug-question-candidate/20200807103326038496-1657489.jpg?w=256)
Physical Chemistry
Generala Derive a relationship between molality molarity of a solution in which w g of solute of molar mass M g mol is dissolved in W g solvent density of resulting solution d g ml 1 4 g mL b Calculate molality of 1 2 M H SO4 solution If its p
![24 Oxidation state of Fe in Fe3O4 is 1 1 1 IN N 2 2 3 2 2 2 3 4 4 2](https://media.kunduz.com/media/sug-question-candidate/20200711021302015372-1809176.jpg?w=256)
![Calculate wt of urea which must be dissolved in 400 g of water so final solutions has V P 2 less than V P of pure water Let V P be V of water P P 02 V](https://media.kunduz.com/media/sug-question-candidate/20200807103823662092-1657489.jpg?w=256)
Physical Chemistry
GeneralCalculate wt of urea which must be dissolved in 400 g of water so final solutions has V P 2 less than V P of pure water Let V P be V of water P P 02 V
![2 Which of the following is intermolecular redox reaction CHO i OH CH OH CHO ii HgO COOH 1 1 OH ii H O 3 4CrO5 6H SO4 2Cr SO4 3 6H O 702 2 2C H CHO CH5COOH CH CH OH](https://media.kunduz.com/media/sug-question-candidate/20200807000806318814-1903025.jpg?w=256)
Physical Chemistry
General2 Which of the following is intermolecular redox reaction CHO i OH CH OH CHO ii HgO COOH 1 1 OH ii H O 3 4CrO5 6H SO4 2Cr SO4 3 6H O 702 2 2C H CHO CH5COOH CH CH OH
![4 9 47 m 7100 gm of a mixture of CaCO3 and Na CO was ignited strongly which forms 11 2 L of CO at STP Then the mass ratio of Na CO3 and Caco in the mixture will be 1 1 4 3 2 1 2 4 1 4 1 1 llowing has maximum number o](https://media.kunduz.com/media/sug-question-candidate/20200709143540344534-675498.jpg?w=256)
Physical Chemistry
General4 9 47 m 7100 gm of a mixture of CaCO3 and Na CO was ignited strongly which forms 11 2 L of CO at STP Then the mass ratio of Na CO3 and Caco in the mixture will be 1 1 4 3 2 1 2 4 1 4 1 1 llowing has maximum number o
![29 28 30 31 32 1 33 B 1 litre Which of the following has the highest mass A 1 g atom of C B mole of CH4 10 2 D 3 01 x 1016 condensed to water occupies an approximate volume of C 1 ml D 18 ml C 10 ml of water A person adds 1 71 gram of sugar C12H22011 in order to sweeten his tea The number of carbon atoms added D 3 011 1023 atoms of oxygen are mol mass of sugar 342 A 3 6 1022 B 7 2 x 1021 C 0 05 D 6 6 10 2 500 ml of a gaseous hydrocarbon when burnt in excess of O gave 2 5 It of CO and 3 0 It of water vapours under same conditions Molecular formula of the hydrocarbon is A C4H8 B C4H10 C C5H10 D C5H12 On analysis a certain compound was found to contain iodine and oxygen in the ratio of 254 80 The formula of the compound is At mass I 127 O 16 A 10 B 1 0 C 1502 D 1 05 A compound contains 38 8 C 16 0 H and 45 2 N The empirical formula of the compound would be A CH3NH C C H5CN D CH2 NH 2 B CH3CN A giant molecule contains 0 25 of a metal whose atomic weight is 59 Its molecule contains one atom of that metal Its minimum molecular weight is A 5900 B 23600 C 11800 D 100 59 0 4 Element A reacts with oxygen to form a compound A O3 If 0 359 gram of A react to give 0 559 gram of the tomic weight of A will be D 47 9](https://media.kunduz.com/media/sug-question-candidate/20200718105340291853-1884543.jpg?w=256)
Physical Chemistry
General29 28 30 31 32 1 33 B 1 litre Which of the following has the highest mass A 1 g atom of C B mole of CH4 10 2 D 3 01 x 1016 condensed to water occupies an approximate volume of C 1 ml D 18 ml C 10 ml of water A person adds 1 71 gram of sugar C12H22011 in order to sweeten his tea The number of carbon atoms added D 3 011 1023 atoms of oxygen are mol mass of sugar 342 A 3 6 1022 B 7 2 x 1021 C 0 05 D 6 6 10 2 500 ml of a gaseous hydrocarbon when burnt in excess of O gave 2 5 It of CO and 3 0 It of water vapours under same conditions Molecular formula of the hydrocarbon is A C4H8 B C4H10 C C5H10 D C5H12 On analysis a certain compound was found to contain iodine and oxygen in the ratio of 254 80 The formula of the compound is At mass I 127 O 16 A 10 B 1 0 C 1502 D 1 05 A compound contains 38 8 C 16 0 H and 45 2 N The empirical formula of the compound would be A CH3NH C C H5CN D CH2 NH 2 B CH3CN A giant molecule contains 0 25 of a metal whose atomic weight is 59 Its molecule contains one atom of that metal Its minimum molecular weight is A 5900 B 23600 C 11800 D 100 59 0 4 Element A reacts with oxygen to form a compound A O3 If 0 359 gram of A react to give 0 559 gram of the tomic weight of A will be D 47 9
![9 A mixture of N and H is caused to react in a closed container to form NH3 The reaction ceases before any of the reactant has been totally consumed At this stage 4 moles each of N H and NH3 are present Then the weight of N and H present originally were respectively 1 224 g and 16 g 3 168 g and 16 g 2 168 g and 20 g 4 224 g and 20 g](https://media.kunduz.com/media/sug-question-candidate/20200612141853894092-675498.jpg?w=256)
Physical Chemistry
General9 A mixture of N and H is caused to react in a closed container to form NH3 The reaction ceases before any of the reactant has been totally consumed At this stage 4 moles each of N H and NH3 are present Then the weight of N and H present originally were respectively 1 224 g and 16 g 3 168 g and 16 g 2 168 g and 20 g 4 224 g and 20 g
![Oxidation of succinate ion produces ethylene and carbon dioxide gases On passing 0 2 Faraday electricity through on aqueous solution of potassium succinate the total volume of gases at both cathode and anode at STP 1 atm and 273 K is JEE MAINS ONLINE 2016 1 8 96 L 2 2 24 L 3 4 48 L 4 6 72 L](https://media.kunduz.com/media/sug-question-candidate/20200616113258773475-1338864.jpg?w=256)
Physical Chemistry
GeneralOxidation of succinate ion produces ethylene and carbon dioxide gases On passing 0 2 Faraday electricity through on aqueous solution of potassium succinate the total volume of gases at both cathode and anode at STP 1 atm and 273 K is JEE MAINS ONLINE 2016 1 8 96 L 2 2 24 L 3 4 48 L 4 6 72 L
![KTRA CREDIT It was found that 16 g SO were formed from the reaction of iron IV sulfide and](https://media.kunduz.com/media/sug-question-candidate/20200623165540140562-1849134.jpg?w=256)
Physical Chemistry
GeneralKTRA CREDIT It was found that 16 g SO were formed from the reaction of iron IV sulfide and
![CaCO3 decomposes to give CaO and CO if the masses of CaO and CO produced are 5 6 g and 4 4 g respectively by heating 12 g of an impure CaCO3 sample then the impurity of the sample will be 1 33 33 2 16 67 3 83 33](https://media.kunduz.com/media/sug-question-candidate/20200714182711774675-1280819.jpg?w=256)
Physical Chemistry
GeneralCaCO3 decomposes to give CaO and CO if the masses of CaO and CO produced are 5 6 g and 4 4 g respectively by heating 12 g of an impure CaCO3 sample then the impurity of the sample will be 1 33 33 2 16 67 3 83 33
![1 2 g mixture of two divalent metals A at wt 30 and B at wt 15 on reacting with dilute HCI of dide KEY o tosolution gives 2 24 L H gas at NTP then 2 composition of A in g 1 1 2 0 5 La 3 1 5 08 4 1 2 22 2 8](https://media.kunduz.com/media/sug-question-candidate/20200612133339239832-709854.jpg?w=256)
Physical Chemistry
General1 2 g mixture of two divalent metals A at wt 30 and B at wt 15 on reacting with dilute HCI of dide KEY o tosolution gives 2 24 L H gas at NTP then 2 composition of A in g 1 1 2 0 5 La 3 1 5 08 4 1 2 22 2 8
![A mixture of potassium chlorate oxalic acid and sulphuric acid is heated During the reaction which element undergoes maximum change in the oxidation number a S c Cl b H d C Prelims 2012](https://media.kunduz.com/media/sug-question-candidate/20200613054340000599-1642118.jpg?w=256)
Physical Chemistry
GeneralA mixture of potassium chlorate oxalic acid and sulphuric acid is heated During the reaction which element undergoes maximum change in the oxidation number a S c Cl b H d C Prelims 2012
![Yellow light emitted from a sodium lamp has a wavelength A of 580 nm Calculate the frequency v wave number and energy of yellow light photon](https://media.kunduz.com/media/sug-question-candidate/20200713030640791646-1648442.jpg?w=256)
Physical Chemistry
GeneralYellow light emitted from a sodium lamp has a wavelength A of 580 nm Calculate the frequency v wave number and energy of yellow light photon
![102 NaOH then nature of resulting solution and 0 6 N CAN normality of excess of reactant left is D 0501 M 10 1 Acidic N 5 N blom 2 Basic M N 5 mi of N](https://media.kunduz.com/media/sug-question-candidate/20200715180531391403-1280819.jpg?w=256)
Physical Chemistry
General102 NaOH then nature of resulting solution and 0 6 N CAN normality of excess of reactant left is D 0501 M 10 1 Acidic N 5 N blom 2 Basic M N 5 mi of N
![c 500 500 A sample of an alloy of silver weighing 0 50 g and containing 90 silver was dissolved in conc HNO3 and silver was analysed by Volhard method A volume of 25 ml of a KCNS solution was required for complete precipitation The normality of KCNS solution is Ag 108 a 4 167 c 3 136 b 0 167 d 0 125](https://media.kunduz.com/media/sug-question-candidate/20200703162134731943-1655732.jpg?w=256)
Physical Chemistry
Generalc 500 500 A sample of an alloy of silver weighing 0 50 g and containing 90 silver was dissolved in conc HNO3 and silver was analysed by Volhard method A volume of 25 ml of a KCNS solution was required for complete precipitation The normality of KCNS solution is Ag 108 a 4 167 c 3 136 b 0 167 d 0 125
![19 For the reaction 2NO g 2NO g O g K 1 8x10 6 at 185 C The value of K for the reaction NO g NO g O g at the same temperature is S a 1 34 10 b 1 8 10 6 09x 10 3 d 1 8 106](https://media.kunduz.com/media/sug-question-candidate/20200619140650203802-698013.jpg?w=256)
Physical Chemistry
General19 For the reaction 2NO g 2NO g O g K 1 8x10 6 at 185 C The value of K for the reaction NO g NO g O g at the same temperature is S a 1 34 10 b 1 8 10 6 09x 10 3 d 1 8 106
![The most stable complex among the following is 2 Co NH3 2 4 Mn NH3 2 1 Fe NH3 612 3 Ni NH3](https://media.kunduz.com/media/sug-question-candidate/20200630161914810086-675498.jpg?w=256)
Physical Chemistry
GeneralThe most stable complex among the following is 2 Co NH3 2 4 Mn NH3 2 1 Fe NH3 612 3 Ni NH3
![When an ideal gas undergoes unrestricted expansic no cooling takes place because the molecules a Exert no attractive forces on each other b Do work equal to loss of KE c Collide without loss of energy d Are above the inversion temperature](https://media.kunduz.com/media/sug-question-candidate/20200714032727722778-1648442.jpg?w=256)
Physical Chemistry
GeneralWhen an ideal gas undergoes unrestricted expansic no cooling takes place because the molecules a Exert no attractive forces on each other b Do work equal to loss of KE c Collide without loss of energy d Are above the inversion temperature
![5 Tyndall effect is more pronounced in a hydrophilic sols c lyophilic sols b hydrophobic sols d Both a and c](https://media.kunduz.com/media/sug-question-candidate/20200606140016089949-1694569.jpg?w=256)
Physical Chemistry
General5 Tyndall effect is more pronounced in a hydrophilic sols c lyophilic sols b hydrophobic sols d Both a and c
![An equilibrium mixture at 700 K of 0 50 M N 3 00 M H and 2 00 M NH is present in a container Now if this equilibrium is disturbed by adding N so that its concentration becomes 1 50 M just after addition then which of the following graphs represents the above situation more appropriately Initial og Now oq Initial og Now oq A 2 0 1 0 C 3 0 2 0 1 0 Time Initial eq New eq Time NH NH B D 1 conc Conc M 2 0 1 0 3 0 2 0 1 0 Time Intial og New oq NH H N NH H N Timo 050 M N 3 00 MH 2 00 M NH fer](https://media.kunduz.com/media/sug-question-candidate/20200720143915428402-1362708.jpg?w=256)
Physical Chemistry
GeneralAn equilibrium mixture at 700 K of 0 50 M N 3 00 M H and 2 00 M NH is present in a container Now if this equilibrium is disturbed by adding N so that its concentration becomes 1 50 M just after addition then which of the following graphs represents the above situation more appropriately Initial og Now oq Initial og Now oq A 2 0 1 0 C 3 0 2 0 1 0 Time Initial eq New eq Time NH NH B D 1 conc Conc M 2 0 1 0 3 0 2 0 1 0 Time Intial og New oq NH H N NH H N Timo 050 M N 3 00 MH 2 00 M NH fer
![Which of the following changes with increase in temperature AIEEE 2002 a Molality b Weight fraction of solute c Fraction of solute present in water d Mole fraction](https://media.kunduz.com/media/sug-question-candidate/20200711042654707007-1648442.jpg?w=256)
Physical Chemistry
GeneralWhich of the following changes with increase in temperature AIEEE 2002 a Molality b Weight fraction of solute c Fraction of solute present in water d Mole fraction
![n moles of an ideal triatomic linear gas undergoes a process in which the temperature changes with volum as T k V where k is a constant Choose incorrect alternative 5 A At normal temperature C R BAt any temperature C C R C At normal temperature molar heat capacity C 3R DAt any temperature molar heat capacity C 3R](https://media.kunduz.com/media/sug-question-candidate/20200716065236849409-693813.jpg?w=256)
Physical Chemistry
Generaln moles of an ideal triatomic linear gas undergoes a process in which the temperature changes with volum as T k V where k is a constant Choose incorrect alternative 5 A At normal temperature C R BAt any temperature C C R C At normal temperature molar heat capacity C 3R DAt any temperature molar heat capacity C 3R
![is due to adsorption of a H b S c OH 72 At CMC the surfactant molecules a decompose c associate 3 d 0 74 d b become completely soluble d dissociate and 5 itsad Arsenic sulphide in mering sol The reagent with least is negative](https://media.kunduz.com/media/sug-question-candidate/20200606135713398613-1694569.jpg?w=256)
Physical Chemistry
Generalis due to adsorption of a H b S c OH 72 At CMC the surfactant molecules a decompose c associate 3 d 0 74 d b become completely soluble d dissociate and 5 itsad Arsenic sulphide in mering sol The reagent with least is negative
![Given X Na HASO Y NaBrO ZHCl NaBr H AsO NaCl The values of X Y and Z in the above redox reaction are respectively 2 3 1 6 1 2 1 3 3 2 1 2 JEE Main o 4 3 1 4](https://media.kunduz.com/media/sug-question-candidate/20200615061737692983-1826338.jpg?w=256)
Physical Chemistry
GeneralGiven X Na HASO Y NaBrO ZHCl NaBr H AsO NaCl The values of X Y and Z in the above redox reaction are respectively 2 3 1 6 1 2 1 3 3 2 1 2 JEE Main o 4 3 1 4
![21 1 4 g of an organic compound was digested according to Kjeldahl s method and the ammonia evolved was absorbed in 60 mL of M 10 H SO4 solution The excess sulphuric acid required 20 mL of M 10 NaOH solution for neutralization The percentage of nitrogen in the compound is 1 3 2 5 3 10 4 24](https://media.kunduz.com/media/sug-question-candidate/20200607180832795352-1681262.jpg?w=256)
Physical Chemistry
General21 1 4 g of an organic compound was digested according to Kjeldahl s method and the ammonia evolved was absorbed in 60 mL of M 10 H SO4 solution The excess sulphuric acid required 20 mL of M 10 NaOH solution for neutralization The percentage of nitrogen in the compound is 1 3 2 5 3 10 4 24
![6 02 x 1020 molecules of a substance weigh 44 mg What is the molar mass of the substance](https://media.kunduz.com/media/sug-question-candidate/20200702061437046257-1868846.jpg?w=256)
Physical Chemistry
General6 02 x 1020 molecules of a substance weigh 44 mg What is the molar mass of the substance
![2 molecules ions 1 XeF4 4 SiF4 2 BF AIEEE 2006 The decreasing values of bond angles from NH3 1069 to SbH3 919 down group 15 of the periodic table is due are all the bonds not equal 3 SF4 to 1 decreasing lp bp repulsion 3 increasing bp bp repulsion 2 increasing electronegativity 4 increasing p orbital character in sp In which of the following ionization process the bond order has increased and the magnetic behaviour has changed AIEEE 2007](https://media.kunduz.com/media/sug-question-candidate/20200618123729192247-1513740.jpg?w=256)
Physical Chemistry
General2 molecules ions 1 XeF4 4 SiF4 2 BF AIEEE 2006 The decreasing values of bond angles from NH3 1069 to SbH3 919 down group 15 of the periodic table is due are all the bonds not equal 3 SF4 to 1 decreasing lp bp repulsion 3 increasing bp bp repulsion 2 increasing electronegativity 4 increasing p orbital character in sp In which of the following ionization process the bond order has increased and the magnetic behaviour has changed AIEEE 2007
![If 100 mL of 0 100 M Na SO is added to 200 mL of 0 150 M NaCl what is the concentration of Na ions in the final solution Assume that the volume are additive A 0 133 M B 0 167 M C 0 250 M D 0 350 M illilitan of 0 300 M phosphoris](https://media.kunduz.com/media/sug-question-candidate/20200710164548689512-1759662.jpg?w=256)
Physical Chemistry
GeneralIf 100 mL of 0 100 M Na SO is added to 200 mL of 0 150 M NaCl what is the concentration of Na ions in the final solution Assume that the volume are additive A 0 133 M B 0 167 M C 0 250 M D 0 350 M illilitan of 0 300 M phosphoris
![No of oxalic acid molecules in 100 mL of 0 02 N oxalic acid are a 6 023 1020 c 6 023x1022 b 6 023x1021 d 6 023 x 1023](https://media.kunduz.com/media/sug-question-candidate/20200710152314025847-1648442.jpg?w=256)
Physical Chemistry
GeneralNo of oxalic acid molecules in 100 mL of 0 02 N oxalic acid are a 6 023 1020 c 6 023x1022 b 6 023x1021 d 6 023 x 1023
![If uncertainty of position of electron is zero the uncertainty in its momentum would be a Zero b h 2n c h 4 d x 8](https://media.kunduz.com/media/sug-question-candidate/20200711084454772732-1648442.jpg?w=256)
Physical Chemistry
GeneralIf uncertainty of position of electron is zero the uncertainty in its momentum would be a Zero b h 2n c h 4 d x 8
![A beam of specific kind of particles of velocity 2 1 x 107 m s is scattered by a gold nuclei Find out specific charge charge mass of this particle if the distance of approach is 2 5 10 4 m a 4 84 107 C kg b 4 84 x 10 7 C kg c 2 42 x 107 C kg d 3x10 12 C](https://media.kunduz.com/media/sug-question-candidate/20200611071814089005-1519193.jpg?w=256)
Physical Chemistry
GeneralA beam of specific kind of particles of velocity 2 1 x 107 m s is scattered by a gold nuclei Find out specific charge charge mass of this particle if the distance of approach is 2 5 10 4 m a 4 84 107 C kg b 4 84 x 10 7 C kg c 2 42 x 107 C kg d 3x10 12 C
![The composition What percentage III of a sample of wustite is Fe 0 9301 of iron is present in the form of IIT 199](https://media.kunduz.com/media/sug-question-candidate/20200713130757988766-1648442.jpg?w=256)
Physical Chemistry
GeneralThe composition What percentage III of a sample of wustite is Fe 0 9301 of iron is present in the form of IIT 199
![Number of atoms in 558 5 g Fe at wt 55 85 is AIEEE 2002 a Twice that in 60 g carbon b 6 023x1022 c Half in 8 g He 5022x 1023](https://media.kunduz.com/media/sug-question-candidate/20200711042643448076-1648442.jpg?w=256)
Physical Chemistry
GeneralNumber of atoms in 558 5 g Fe at wt 55 85 is AIEEE 2002 a Twice that in 60 g carbon b 6 023x1022 c Half in 8 g He 5022x 1023
![4 Select the incorrect 1 Extensive properties are additive in nature 2 Intensive properties are mass independent 3 Vapour pressure is an extensive property 4 Pressure is an intensive property](https://media.kunduz.com/media/sug-question-candidate/20200720161932430949-1835984.jpg?w=256)
Physical Chemistry
General4 Select the incorrect 1 Extensive properties are additive in nature 2 Intensive properties are mass independent 3 Vapour pressure is an extensive property 4 Pressure is an intensive property
![The density of 3M solution of sodium thiosulphate Na S O is 1 58 g ml Calculate amount of Na S O in w w i mole fraction of Na S O iii molality of Na and S O2 ions Calculat](https://media.kunduz.com/media/sug-question-candidate/20200606113711087998-1681262.jpg?w=256)
Physical Chemistry
GeneralThe density of 3M solution of sodium thiosulphate Na S O is 1 58 g ml Calculate amount of Na S O in w w i mole fraction of Na S O iii molality of Na and S O2 ions Calculat
![51 Which of the following is not primary standard a Na CO3 10H 0 b Oxalic acid 10H 0 d NaOH 52 c Na B407 The mole](https://media.kunduz.com/media/sug-question-candidate/20200711023600671990-1648442.jpg?w=256)
Physical Chemistry
General51 Which of the following is not primary standard a Na CO3 10H 0 b Oxalic acid 10H 0 d NaOH 52 c Na B407 The mole
![100 ml of 3 mol H SO reacts with 100 ml of 3 mol NaOH Enthalpy of neutralisation of reaction will be 1 57 1 kJ mol 3 0 3 x 57 1 kJ 2 2 x 57 1 kJ 4 3 57 1 kJ](https://media.kunduz.com/media/sug-question-candidate/20200614070755405956-1793800.jpg?w=256)
Physical Chemistry
General100 ml of 3 mol H SO reacts with 100 ml of 3 mol NaOH Enthalpy of neutralisation of reaction will be 1 57 1 kJ mol 3 0 3 x 57 1 kJ 2 2 x 57 1 kJ 4 3 57 1 kJ
![Which has minimum number of atoms of oxygen Kame X10 ml H 0 e 2 0 1 mol of V 05 s Begr 3 12 gm O g 4 12 04 x 1022 molecules of CO I male 1](https://media.kunduz.com/media/sug-question-candidate/20200716122342604354-1448338.jpg?w=256)
Physical Chemistry
GeneralWhich has minimum number of atoms of oxygen Kame X10 ml H 0 e 2 0 1 mol of V 05 s Begr 3 12 gm O g 4 12 04 x 1022 molecules of CO I male 1
![16 In aqueous solution the ionization constants for carbonic acid are K 4 2 107 and K 4 8 10 1 Select the correct statement for a saturated 0 034 M solution of the carbonic acid 2 1 The concentration of H is double that of CO 2 The concentration of CO2 is 0 034 M 2 3 The concentration of CO3 is greater than that of HCO3 4 The concentrations of H and HCO3 are approximately equal AIEEE 2010 I will Motions start precipitating](https://media.kunduz.com/media/sug-question-candidate/20200621190939791798-1338864.jpg?w=256)
Physical Chemistry
General16 In aqueous solution the ionization constants for carbonic acid are K 4 2 107 and K 4 8 10 1 Select the correct statement for a saturated 0 034 M solution of the carbonic acid 2 1 The concentration of H is double that of CO 2 The concentration of CO2 is 0 034 M 2 3 The concentration of CO3 is greater than that of HCO3 4 The concentrations of H and HCO3 are approximately equal AIEEE 2010 I will Motions start precipitating
![From the following bond energies H H bond energy 431 37 kJ mol C C bond energy 606 10 kJ mol C C bond energy 336 49 kJ mol C H bond energy 410 50 kJ mol Enthalpy for the reaction H H H H C C H HH C C H H H will be 1 553 0 kJ mol 1 OH H 2 1523 6 kJ mo](https://media.kunduz.com/media/sug-question-candidate/20200707084658618743-1864899.jpg?w=256)
Physical Chemistry
GeneralFrom the following bond energies H H bond energy 431 37 kJ mol C C bond energy 606 10 kJ mol C C bond energy 336 49 kJ mol C H bond energy 410 50 kJ mol Enthalpy for the reaction H H H H C C H HH C C H H H will be 1 553 0 kJ mol 1 OH H 2 1523 6 kJ mo
![526 3 mL of 0 5 m HCl is shaken with 0 5 g of activated charcoal and filtered The concentration of the filtrate is reduced to 0 4 m The amount of adsorption x m is](https://media.kunduz.com/media/sug-question-candidate/20200614102112823357-1339674.jpg?w=256)
Physical Chemistry
General526 3 mL of 0 5 m HCl is shaken with 0 5 g of activated charcoal and filtered The concentration of the filtrate is reduced to 0 4 m The amount of adsorption x m is
![5 Chloride samples are prepared for analysis by using NaCl KCl and NH4Cl separately or as mixture What minimum volume of 5 by weight AgNO3 solution sp gr 1 04g mL must be added to a sample of 0 3g in order to ensure complete precipitation of chloride in every possible case](https://media.kunduz.com/media/sug-question-candidate/20200710165952352696-1648442.jpg?w=256)
Physical Chemistry
General5 Chloride samples are prepared for analysis by using NaCl KCl and NH4Cl separately or as mixture What minimum volume of 5 by weight AgNO3 solution sp gr 1 04g mL must be added to a sample of 0 3g in order to ensure complete precipitation of chloride in every possible case
![c 90 a 0470 0 10 g of a sample containing CuCO and some inert impurity was dissolved in dilute sulphuric acid and volume made up to 50 mL This solution was added into 50 mL of 0 04 M KI solution where copper precipitates as Cul and I is oxidized into I3 A 10 mL portion of this solution is taken for analysis filtered and made up free I3 and then treated with excess of acidic permanganate solution Liberated iodine required 20 mL of 2 5 mM sodium thiosulphate solution to reach the end point Determine mass percentage of CuCO3 in the original sample a 7 41 c 61 75 b 74 1 d None of these](https://media.kunduz.com/media/sug-question-candidate/20200715095735080150-693813.jpg?w=256)
Physical Chemistry
Generalc 90 a 0470 0 10 g of a sample containing CuCO and some inert impurity was dissolved in dilute sulphuric acid and volume made up to 50 mL This solution was added into 50 mL of 0 04 M KI solution where copper precipitates as Cul and I is oxidized into I3 A 10 mL portion of this solution is taken for analysis filtered and made up free I3 and then treated with excess of acidic permanganate solution Liberated iodine required 20 mL of 2 5 mM sodium thiosulphate solution to reach the end point Determine mass percentage of CuCO3 in the original sample a 7 41 c 61 75 b 74 1 d None of these