Solutions Questions and Answers
![S E 22 M m m nim n m 20x 80 00 40x 2000 20x600 30x20000 40 x 30 30x60 2X4x4x 12 36 108 x 10 6 12 18 X 105 43 333 gram Answer 23 46 Answer rated as Satisfied Contact Tutor option is selected sir why did we have square in nume dear student this is actually a formula for polymers four kind of average molecular weight number average weight average viscosity average atc are thoro ach have different](https://media.kunduz.com/media/sug-question-candidate/20210324103320930198-2588121.jpg?w=256)
Physical Chemistry
SolutionsS E 22 M m m nim n m 20x 80 00 40x 2000 20x600 30x20000 40 x 30 30x60 2X4x4x 12 36 108 x 10 6 12 18 X 105 43 333 gram Answer 23 46 Answer rated as Satisfied Contact Tutor option is selected sir why did we have square in nume dear student this is actually a formula for polymers four kind of average molecular weight number average weight average viscosity average atc are thoro ach have different
![The enthalpy of vaporization for water is 186 5 kJ mol the entropy of its vaporization will be 1 0 5 kJK mol 3 1 5 kJ K mole 2 1 0 kJK mole 8 4 2 0 kJK mole](https://media.kunduz.com/media/sug-question-candidate/20201016175252553826-1255588.jpg?w=256)
Physical Chemistry
SolutionsThe enthalpy of vaporization for water is 186 5 kJ mol the entropy of its vaporization will be 1 0 5 kJK mol 3 1 5 kJ K mole 2 1 0 kJK mole 8 4 2 0 kJK mole
![The inactivation of a viral preparation in a chemical bath is found to be a first order reaction The rate constant for the viral inactivation if the beginning 1 5 of the virus is inactivated per minute is Given In 100 0 01511 AAJ KA TOPPER 98 5 2 2 5 10 sec 1 1 25x10 sec 3 5 10 sec 4 2 5x10 min Consider the following standard electrode potentials in volts in aqueous solution](https://media.kunduz.com/media/sug-question-candidate/20210321152015677293-2662149.jpg?w=256)
Physical Chemistry
SolutionsThe inactivation of a viral preparation in a chemical bath is found to be a first order reaction The rate constant for the viral inactivation if the beginning 1 5 of the virus is inactivated per minute is Given In 100 0 01511 AAJ KA TOPPER 98 5 2 2 5 10 sec 1 1 25x10 sec 3 5 10 sec 4 2 5x10 min Consider the following standard electrode potentials in volts in aqueous solution
![29 How many g of dibasic acid mol weight 200 should be present in 100 ml of the aqueous solution to give strength of 0 1 N 1 10 g 3 19 2 2 g 4 20 g](https://media.kunduz.com/media/sug-question-candidate/20210319085553817961-2662149.jpg?w=256)
Physical Chemistry
Solutions29 How many g of dibasic acid mol weight 200 should be present in 100 ml of the aqueous solution to give strength of 0 1 N 1 10 g 3 19 2 2 g 4 20 g
![Which among the following statements is false 1 The correct order of osmotic pressure for 0 01 M aqueous solution of each compound is BaCl KCI CH COOH Sucrose 2 The osmotic pressure of a solution is given by the equation MRT where M is the molarity of the solution 3 Raoult s law states that the vapour pressure of a component over a solution is proportional to it s mole fraction 4 Two sucrose solutions of the same molaltiy prepared in different solvents will have the same freezing point depression](https://media.kunduz.com/media/sug-question-candidate/20210323121731580401-2662149.jpg?w=256)
Physical Chemistry
SolutionsWhich among the following statements is false 1 The correct order of osmotic pressure for 0 01 M aqueous solution of each compound is BaCl KCI CH COOH Sucrose 2 The osmotic pressure of a solution is given by the equation MRT where M is the molarity of the solution 3 Raoult s law states that the vapour pressure of a component over a solution is proportional to it s mole fraction 4 Two sucrose solutions of the same molaltiy prepared in different solvents will have the same freezing point depression
![n M Which phenomenon occurs when an electric field is applied to a colloidal solution and electrophoresis is prevented by some suitable means Reverse osmosis takes place Electrosmosis takes place Dispersion medium begins to move Dispersion medium becomes stationary](https://media.kunduz.com/media/sug-question-candidate/20210321100301097531-1229757.jpg?w=256)
Physical Chemistry
Solutionsn M Which phenomenon occurs when an electric field is applied to a colloidal solution and electrophoresis is prevented by some suitable means Reverse osmosis takes place Electrosmosis takes place Dispersion medium begins to move Dispersion medium becomes stationary
![A semipermeable membrane separates a 0 2 M glucose solution from a 0 4 M glucose solution The solvent water will flow from the solution to the solution The volume of the 0 4 M solution will 0 4 M 0 2 M decrease 0 2 M 0 4 M decrease 0 2 M 0 4 M increase Click the answer you think is right Do you know the answer](https://media.kunduz.com/media/sug-question-candidate/20210323160546796901-3154027.jpg?w=256)
Physical Chemistry
SolutionsA semipermeable membrane separates a 0 2 M glucose solution from a 0 4 M glucose solution The solvent water will flow from the solution to the solution The volume of the 0 4 M solution will 0 4 M 0 2 M decrease 0 2 M 0 4 M decrease 0 2 M 0 4 M increase Click the answer you think is right Do you know the answer
![A certain amount of a metal whose equivalent m is 28 displaces 0 7 L of H at S T P from an hence mass of the element is 1 1 75 g 2 0 875 g 3 3 50 g 4 7 00 g Number of Fe atoms in 100 g Haemoglobin](https://media.kunduz.com/media/sug-question-candidate/20210319100305478580-2662149.jpg?w=256)
Physical Chemistry
SolutionsA certain amount of a metal whose equivalent m is 28 displaces 0 7 L of H at S T P from an hence mass of the element is 1 1 75 g 2 0 875 g 3 3 50 g 4 7 00 g Number of Fe atoms in 100 g Haemoglobin
![Id The rate constant for the second order reaction 2NO g 2NO g O g is 0 54 M s at 300 C How long in seconds would it take for the concentration of NO to de 0 62 M to 0 28 M 3 pts](https://media.kunduz.com/media/sug-question-candidate/20210321080053503224-1905812.jpg?w=256)
Physical Chemistry
SolutionsId The rate constant for the second order reaction 2NO g 2NO g O g is 0 54 M s at 300 C How long in seconds would it take for the concentration of NO to de 0 62 M to 0 28 M 3 pts
![48 If the osmotic pressure of a 0 010 M aqueous solution of sucrose at 27 C is 0 25 atm then the osmotic pressure of a 0 010 M aqueous solution of NaCl at 27 C is 3 0 25 atm 1 0 062 atm 2 0 12 atm 4 0 50 atm](https://media.kunduz.com/media/sug-question-candidate/20210323035626651587-2662149.jpg?w=256)
Physical Chemistry
Solutions48 If the osmotic pressure of a 0 010 M aqueous solution of sucrose at 27 C is 0 25 atm then the osmotic pressure of a 0 010 M aqueous solution of NaCl at 27 C is 3 0 25 atm 1 0 062 atm 2 0 12 atm 4 0 50 atm
![4 Acetone chloroform 490 Benzene and toluene form nearly ideal solutions At 20 C the vapour pressure of benzene is 75 torr and that of toluene is 22 torr The partial pressure of benzene at 20 C for a solution containing 78 g of benzene and 46 g of toluene in torr is 1 25 3 53 5 2 50 4 37 5 ans](https://media.kunduz.com/media/sug-question-candidate/20201020024641241494-2007559.jpg?w=256)
Physical Chemistry
Solutions4 Acetone chloroform 490 Benzene and toluene form nearly ideal solutions At 20 C the vapour pressure of benzene is 75 torr and that of toluene is 22 torr The partial pressure of benzene at 20 C for a solution containing 78 g of benzene and 46 g of toluene in torr is 1 25 3 53 5 2 50 4 37 5 ans
![How many times more soluble is AgCl when added to a solution of NaCN A colorless complex ion Ag CN 2 results from this addition Ksp for AgCl is 1 8 x 10 10 and Kf for Ag CN 2 is 1 0 x 1021 A 8 1 x 10 7 B 1 0 x 1021 C 1 8 x 10 10 D 1 8 x 1011 O A B A](https://media.kunduz.com/media/sug-question-candidate/20210318134013070021-2420399.jpg?w=256)
Physical Chemistry
SolutionsHow many times more soluble is AgCl when added to a solution of NaCN A colorless complex ion Ag CN 2 results from this addition Ksp for AgCl is 1 8 x 10 10 and Kf for Ag CN 2 is 1 0 x 1021 A 8 1 x 10 7 B 1 0 x 1021 C 1 8 x 10 10 D 1 8 x 1011 O A B A
![A solution of acetone in ethanol 1 Obeys Raoult s law 2 Shows a negative deviation from Raoult s law 3 Shows a positive deviation from Raoult s law 4 Behaves like a near ideal solution HO OH incomplete](https://media.kunduz.com/media/sug-question-candidate/20210322164806242944-2662149.jpg?w=256)
Physical Chemistry
SolutionsA solution of acetone in ethanol 1 Obeys Raoult s law 2 Shows a negative deviation from Raoult s law 3 Shows a positive deviation from Raoult s law 4 Behaves like a near ideal solution HO OH incomplete
![The system N O 2 NO maintained in a closed vessel at 60 C a pressure of 5 atm has an average i e observed molecular weight of 69 calculate K At what pressure at the same temperature would the observed molecular weight be 230 3](https://media.kunduz.com/media/sug-question-candidate/20210321043908382417-2336372.jpg?w=256)
Physical Chemistry
SolutionsThe system N O 2 NO maintained in a closed vessel at 60 C a pressure of 5 atm has an average i e observed molecular weight of 69 calculate K At what pressure at the same temperature would the observed molecular weight be 230 3
![When 5 litres of a gas mixture of methane a propane is perfectly combusted at 0 C ar 1 atmosphere 16 litre of oxygen at the san temperature and pressure is consumed TI amount of heat released from this combustion in AH comb CH 890 kJ mot AH comb C h 2220 kJ mol is 1 32 3 317 2 38 4 477](https://media.kunduz.com/media/sug-question-candidate/20210318133102084482-2662149.jpg?w=256)
Physical Chemistry
SolutionsWhen 5 litres of a gas mixture of methane a propane is perfectly combusted at 0 C ar 1 atmosphere 16 litre of oxygen at the san temperature and pressure is consumed TI amount of heat released from this combustion in AH comb CH 890 kJ mot AH comb C h 2220 kJ mol is 1 32 3 317 2 38 4 477
![1 1 1 1 2 1 2 3 3 3 2 1 01 3 1 At a constant temperature which of the following aqueous solutions will have the maximum vapour pressure Mol wt NaCl 58 5 H SO 98 0 g mol 3 1 molal H SO aq 1 1 molal NaCl aq 2 1 molar NaCl aq 4 1 molar H SO aq When two reactants A and B are mixed to give products C and D the reaction quotient Q at](https://media.kunduz.com/media/sug-question-candidate/20210322151706862820-2662149.jpg?w=256)
Physical Chemistry
Solutions1 1 1 1 2 1 2 3 3 3 2 1 01 3 1 At a constant temperature which of the following aqueous solutions will have the maximum vapour pressure Mol wt NaCl 58 5 H SO 98 0 g mol 3 1 molal H SO aq 1 1 molal NaCl aq 2 1 molar NaCl aq 4 1 molar H SO aq When two reactants A and B are mixed to give products C and D the reaction quotient Q at
![An azeotropic solution of two liquids has boiling point lower than either of them when i 1 shows negative deviation from Raoult s law 2 shows no deviation from Raoult s law 3 shows negative deviation from Raoult s law 4 is saturated](https://media.kunduz.com/media/sug-question-candidate/20210320175046335246-2662149.jpg?w=256)
Physical Chemistry
SolutionsAn azeotropic solution of two liquids has boiling point lower than either of them when i 1 shows negative deviation from Raoult s law 2 shows no deviation from Raoult s law 3 shows negative deviation from Raoult s law 4 is saturated
![Latent heat of vaporization of water is 9 72 kcal mol at 373 15 K calculate molal boiling point elevation constant of water a 5 2 c 52 2 b 0 052 d 0 52](https://media.kunduz.com/media/sug-question-candidate/20201023104305844289-1711005.jpg?w=256)
Physical Chemistry
SolutionsLatent heat of vaporization of water is 9 72 kcal mol at 373 15 K calculate molal boiling point elevation constant of water a 5 2 c 52 2 b 0 052 d 0 52
![3 At a temperature under high pressure Kw H O 1x10 10 A solution of pH 5 4 under these conditions is said to b a acidic c neutral b basic d amphoteric 12](https://media.kunduz.com/media/sug-question-candidate/20210322123942178735-2252856.jpg?w=256)
Physical Chemistry
Solutions3 At a temperature under high pressure Kw H O 1x10 10 A solution of pH 5 4 under these conditions is said to b a acidic c neutral b basic d amphoteric 12
![The molality of a sulphuric acid solution is 0 2 mol kg The total weight of the solution containing 1 mol H SO4 O 1000g O 1098 g O 5000 g O 5098 g](https://media.kunduz.com/media/sug-question-candidate/20210318091349384572-1978248.jpg?w=256)
Physical Chemistry
SolutionsThe molality of a sulphuric acid solution is 0 2 mol kg The total weight of the solution containing 1 mol H SO4 O 1000g O 1098 g O 5000 g O 5098 g
![14 What is the pH of 10 6 M HCI at 25 C NCERT 1 6 3 60H eil 2 7 4 7 beng ins](https://media.kunduz.com/media/sug-question-candidate/20201013170738768080-2123265.jpg?w=256)
Physical Chemistry
Solutions14 What is the pH of 10 6 M HCI at 25 C NCERT 1 6 3 60H eil 2 7 4 7 beng ins
![The total number of electrons present in 18 mL of water 1 6 02 x 1022 2 6 02 x 1023 3 6 02 x 1024 4 6](https://media.kunduz.com/media/sug-question-candidate/20200805160622509146-1875176.jpg?w=256)
Physical Chemistry
SolutionsThe total number of electrons present in 18 mL of water 1 6 02 x 1022 2 6 02 x 1023 3 6 02 x 1024 4 6
![21 Ammonia gas is passed into water yielding a solution of density 0 93 g cm and containing 18 6 NH by weight The mass of NH3 per cc of the solution is 1 0 17 g cm 3 0 51 g cm 2 0 34 g cm 4 0 68 g cm](https://media.kunduz.com/media/sug-question-candidate/20200805142432015819-1897906.jpg?w=256)
Physical Chemistry
Solutions21 Ammonia gas is passed into water yielding a solution of density 0 93 g cm and containing 18 6 NH by weight The mass of NH3 per cc of the solution is 1 0 17 g cm 3 0 51 g cm 2 0 34 g cm 4 0 68 g cm
![Estimate the lowering of vapour pressure due to the solute glucose in a 1 0 M aqueous solution at 100 C a 10 torr b 18 torr c 13 45 torr d 24 torr](https://media.kunduz.com/media/sug-question-candidate/20200803051902389107-1890936.jpg?w=256)
Physical Chemistry
SolutionsEstimate the lowering of vapour pressure due to the solute glucose in a 1 0 M aqueous solution at 100 C a 10 torr b 18 torr c 13 45 torr d 24 torr
![1 An aqueous solution of 6 3g of oxalic acid dihydrate is made 13 upto 250 mL The volume of 0 1 N NaOH required to completely neutralise 100mL of this solution is 2 20mL 4 4mL 1 40mL 3 10mL 1](https://media.kunduz.com/media/sug-question-candidate/20201019181014137254-2045019.jpg?w=256)
Physical Chemistry
Solutions1 An aqueous solution of 6 3g of oxalic acid dihydrate is made 13 upto 250 mL The volume of 0 1 N NaOH required to completely neutralise 100mL of this solution is 2 20mL 4 4mL 1 40mL 3 10mL 1
![34 When Hgl is added in KI solution The freezing point of solution 1 increases 2 decreases 3 Remains unchanged 4 Can t predict wol sv](https://media.kunduz.com/media/sug-question-candidate/20201019173417831311-2007559.jpg?w=256)
Physical Chemistry
Solutions34 When Hgl is added in KI solution The freezing point of solution 1 increases 2 decreases 3 Remains unchanged 4 Can t predict wol sv
![451 P The vapour pressure of pure A is 10 torr and the same temperature when 1 g of B is dissolved in 20 gm of A its vapour pressure is reduced to 9 0 torr If the molecular mass of A is 200 amu then the molecular mass of B is 1 100 amu 3 75 amu 2 90 amu 4 120 amu](https://media.kunduz.com/media/sug-question-candidate/20201020131732493564-2007559.jpg?w=256)
Physical Chemistry
Solutions451 P The vapour pressure of pure A is 10 torr and the same temperature when 1 g of B is dissolved in 20 gm of A its vapour pressure is reduced to 9 0 torr If the molecular mass of A is 200 amu then the molecular mass of B is 1 100 amu 3 75 amu 2 90 amu 4 120 amu
![At 300 K the two solutions of glucose A and B with respective concentrations 0 1 M and 0 01 M are separated by semipermeable membrane How much external pressure need to be applied and on which solution so as to preven osmosis 1 0 2463 atm pressure is applied on solution B 2 2 217 atm pressure is applied on solution A 3 0 0246 atm pressure is applied on solution B 4 0 0217 atm pressure is applied on solution A](https://media.kunduz.com/media/sug-question-candidate/20200802202948261316-1895367.jpg?w=256)
Physical Chemistry
SolutionsAt 300 K the two solutions of glucose A and B with respective concentrations 0 1 M and 0 01 M are separated by semipermeable membrane How much external pressure need to be applied and on which solution so as to preven osmosis 1 0 2463 atm pressure is applied on solution B 2 2 217 atm pressure is applied on solution A 3 0 0246 atm pressure is applied on solution B 4 0 0217 atm pressure is applied on solution A
![A mixture contains 1 mole of volatile liquid A P 100 mm Hg and 3 moles of volatile liquid B P 80 mm Hg If solution behaves ideally the total vapour pressure of the distillate is a 85 mm Hg c 90 mm Hg b b 85 88 mm Hg d 92 mm Hg](https://media.kunduz.com/media/sug-question-candidate/20201008033925836390-2191807.jpg?w=256)
Physical Chemistry
SolutionsA mixture contains 1 mole of volatile liquid A P 100 mm Hg and 3 moles of volatile liquid B P 80 mm Hg If solution behaves ideally the total vapour pressure of the distillate is a 85 mm Hg c 90 mm Hg b b 85 88 mm Hg d 92 mm Hg
![8 The amount of energy released when 10 2 atoms of Cl vapours are converted to CI ions according to the equation Cl g e Cl g is 58 10 10 J Calculate the AH of Cl atom in kJ mol and eV atom a 0 036 eV atom b 3 48 eV atom e 0 038 eV atom d 0 361 eV atom](https://media.kunduz.com/media/sug-question-candidate/20201017180629512450-2186700.jpg?w=256)
Physical Chemistry
Solutions8 The amount of energy released when 10 2 atoms of Cl vapours are converted to CI ions according to the equation Cl g e Cl g is 58 10 10 J Calculate the AH of Cl atom in kJ mol and eV atom a 0 036 eV atom b 3 48 eV atom e 0 038 eV atom d 0 361 eV atom
![37 The lowering of vapour pressure of a solvent by addition of a non volatile solute to it is directly proportional to 1 The strength of the solution 2 The nature of the solute in the solution 3 The atmospheric pressure 4 All](https://media.kunduz.com/media/sug-question-candidate/20200929095726678444-2117610.jpg?w=256)
Physical Chemistry
Solutions37 The lowering of vapour pressure of a solvent by addition of a non volatile solute to it is directly proportional to 1 The strength of the solution 2 The nature of the solute in the solution 3 The atmospheric pressure 4 All
![The indicator phenol red is half in the ionic form when pH is 7 2 If the ratio of the undissociated form to the ionic form is 1 5 find the pH of the solution With the same pH for solution if indicator is altered such that the ratio of undissociated form to dissociated form becomes 1 4 find the pH when 50 of the new indicator is in ionic form](https://media.kunduz.com/media/sug-question-candidate/20200920062324680667-1448524.jpg?w=256)
Physical Chemistry
SolutionsThe indicator phenol red is half in the ionic form when pH is 7 2 If the ratio of the undissociated form to the ionic form is 1 5 find the pH of the solution With the same pH for solution if indicator is altered such that the ratio of undissociated form to dissociated form becomes 1 4 find the pH when 50 of the new indicator is in ionic form
![solut mole fraction of M the following figure Here XL and XM represent mole fractions of L and M respectively in the solution The correct statement s applicable to this system is are c PL 1 Z 0 the deviath XM A Attractive intermolecular interactions between L L in pure liquid L and M M in pure liquid M are stronger than those between L M when mixed in solution B The point Z represents vapour pressure of pure liquid M and Raoult s law is obeyed when XL O C The point Z represents vapour pressure of pure liquid L and Raoult s law is obeyed when XL 1 D The point Z represents vapour pressure of pure liquid M and Raoult s law is obeyed from 2017 XL 0 to XL 1 019](https://media.kunduz.com/media/sug-question-candidate/20200731015718475760-1702037.jpg?w=256)
Physical Chemistry
Solutionssolut mole fraction of M the following figure Here XL and XM represent mole fractions of L and M respectively in the solution The correct statement s applicable to this system is are c PL 1 Z 0 the deviath XM A Attractive intermolecular interactions between L L in pure liquid L and M M in pure liquid M are stronger than those between L M when mixed in solution B The point Z represents vapour pressure of pure liquid M and Raoult s law is obeyed when XL O C The point Z represents vapour pressure of pure liquid L and Raoult s law is obeyed when XL 1 D The point Z represents vapour pressure of pure liquid M and Raoult s law is obeyed from 2017 XL 0 to XL 1 019
![Gold number of gum arabic is 0 15 The amount of gum arabic required to protect 100 ml of gold sol from coagulation by 10 ml of 10 NaCl solution is A 0 15 millimoles B 0 15 mg C 1 5 millimoles D 1 5 mg](https://media.kunduz.com/media/sug-question-candidate/20200731151156242478-1650131.jpg?w=256)
Physical Chemistry
SolutionsGold number of gum arabic is 0 15 The amount of gum arabic required to protect 100 ml of gold sol from coagulation by 10 ml of 10 NaCl solution is A 0 15 millimoles B 0 15 mg C 1 5 millimoles D 1 5 mg
![Equimolar solutions of KCl and compound X in H O show depressions in freezing point in the ratio of 4 1 Assuming KCl to be completely ionized the compound X in solution must A Dissociate to the extent of 50 B Hydrolyse to the extent of 80 C Dimerize to the extent of 50 mi of D Trimerize to the extent of 75](https://media.kunduz.com/media/sug-question-candidate/20200730025935540696-1650131.jpg?w=256)
Physical Chemistry
SolutionsEquimolar solutions of KCl and compound X in H O show depressions in freezing point in the ratio of 4 1 Assuming KCl to be completely ionized the compound X in solution must A Dissociate to the extent of 50 B Hydrolyse to the extent of 80 C Dimerize to the extent of 50 mi of D Trimerize to the extent of 75
![An element X of atomic mass 25 g exists as X4 in benzene to the extent of 100 When 10 30 g of saturated solution of X in benzene is added to 20 0 g of benzene the depression in freezing point of the resulting solution is 0 51 K IfK of benzene is 5 1 K kg mol the solubility of X in 100 g of benzene will be A 2 9 g B 3 0 gute eet brom C 0 7 g bD 0 3 g](https://media.kunduz.com/media/sug-question-candidate/20200730030014859207-1650131.jpg?w=256)
Physical Chemistry
SolutionsAn element X of atomic mass 25 g exists as X4 in benzene to the extent of 100 When 10 30 g of saturated solution of X in benzene is added to 20 0 g of benzene the depression in freezing point of the resulting solution is 0 51 K IfK of benzene is 5 1 K kg mol the solubility of X in 100 g of benzene will be A 2 9 g B 3 0 gute eet brom C 0 7 g bD 0 3 g
![Partial pressure needed to dissolve 21 mg of CO in 100 g of H O at 298 K is K of CO is 2 937 K Pa m mol 1 14 0 kpa 2 7 0 kpa DE THE OPT 3 121 0 kpa S 4 79 0 kpa](https://media.kunduz.com/media/sug-question-candidate/20200729183839507169-1650131.jpg?w=256)
Physical Chemistry
SolutionsPartial pressure needed to dissolve 21 mg of CO in 100 g of H O at 298 K is K of CO is 2 937 K Pa m mol 1 14 0 kpa 2 7 0 kpa DE THE OPT 3 121 0 kpa S 4 79 0 kpa
![The vapour pressure of pure benzene at 50 C is 268 Torr How many moles of non volatile solute per mol of benzene is required to prepare a solution of benzene having a vapour pressure of 167 Torr at 50 C A 0 377 pe C 0 623 D 0 395 B 0 605 29705110CESIA](https://media.kunduz.com/media/sug-question-candidate/20200730025824457627-1650131.jpg?w=256)
Physical Chemistry
SolutionsThe vapour pressure of pure benzene at 50 C is 268 Torr How many moles of non volatile solute per mol of benzene is required to prepare a solution of benzene having a vapour pressure of 167 Torr at 50 C A 0 377 pe C 0 623 D 0 395 B 0 605 29705110CESIA
![At 47 C the vapour pressure of pure ethyl bromide C H Br is 10 Torr and that of pure ethyl chloride C H Cl is 40 Torro Assuming ideal behaviour mole fraction of C H Cl in the liquid state is A 0 20 D 0 25 OUE EN B 0 50 and liathy A C 0 75](https://media.kunduz.com/media/sug-question-candidate/20200730025903317398-1650131.jpg?w=256)
Physical Chemistry
SolutionsAt 47 C the vapour pressure of pure ethyl bromide C H Br is 10 Torr and that of pure ethyl chloride C H Cl is 40 Torro Assuming ideal behaviour mole fraction of C H Cl in the liquid state is A 0 20 D 0 25 OUE EN B 0 50 and liathy A C 0 75
![The freezing point of a dilute solution of acetamide in glacial acetic acid is 298 K This is the value when crystals of 1 ice first appears acetic acid first appears 2 acetamide first appears 4 both appear together](https://media.kunduz.com/media/sug-question-candidate/20200729183738186478-1650131.jpg?w=256)
Physical Chemistry
SolutionsThe freezing point of a dilute solution of acetamide in glacial acetic acid is 298 K This is the value when crystals of 1 ice first appears acetic acid first appears 2 acetamide first appears 4 both appear together
![When mercuric iodide is added to the aqueous solution of potassium iodide then Freezing point is increased Boiling point is increased 3 Freezing point does not change 4 Boiling point does not change](https://media.kunduz.com/media/sug-question-candidate/20200729183639385048-1650131.jpg?w=256)
Physical Chemistry
SolutionsWhen mercuric iodide is added to the aqueous solution of potassium iodide then Freezing point is increased Boiling point is increased 3 Freezing point does not change 4 Boiling point does not change
![11 Methanol and C H OH form an ideal solution Solution is prepared by mixing 32 gm of CH C and 23 gm of C H OH at 300K At 300K Po 90 mm of Hg and Po 51 mm of Calculate methanol ethanol S i partial vapour pressure of its constitutents and total vapour pressure of solution ii Mole fraction of each component in vapour phase](https://media.kunduz.com/media/sug-question-candidate/20200729174312676374-1892076.jpg?w=256)
Physical Chemistry
Solutions11 Methanol and C H OH form an ideal solution Solution is prepared by mixing 32 gm of CH C and 23 gm of C H OH at 300K At 300K Po 90 mm of Hg and Po 51 mm of Calculate methanol ethanol S i partial vapour pressure of its constitutents and total vapour pressure of solution ii Mole fraction of each component in vapour phase
![An aqueous solution contains an unknown concentration of Ba When 50 mL of a 1 M solution of Na SO4 is added BaSO4 just begins to precipitate The final volume is 500 mL The solubilit product of BaSO is 1 x 10 What is the original concentration of Ba 10 M 1 1 0 10 10 3 2 10 M 2 5 x 10 M 4 1 1 x 109 M MAINS 2018](https://media.kunduz.com/media/sug-question-candidate/20200728131112041242-1892241.jpg?w=256)
Physical Chemistry
SolutionsAn aqueous solution contains an unknown concentration of Ba When 50 mL of a 1 M solution of Na SO4 is added BaSO4 just begins to precipitate The final volume is 500 mL The solubilit product of BaSO is 1 x 10 What is the original concentration of Ba 10 M 1 1 0 10 10 3 2 10 M 2 5 x 10 M 4 1 1 x 109 M MAINS 2018
![etermine What is the boiling point of 1 molal aqueous solution of NaCl K 0 52 K molal 1 99 48 C 2 98 96 C 3 100 52 C 4 101 04 C](https://media.kunduz.com/media/sug-question-candidate/20200728132923231722-675498.jpg?w=256)
Physical Chemistry
Solutionsetermine What is the boiling point of 1 molal aqueous solution of NaCl K 0 52 K molal 1 99 48 C 2 98 96 C 3 100 52 C 4 101 04 C
![Which of the following solutions will have pH A 2 0 g of NaOH in 500 cm solution C 100 cm solution of 0 1 N Ca OH 13 assuming complete dissociation B 100 cm solution of 0 05 M Ca OH D 4 0 g of NaOH in 500 cm solution](https://media.kunduz.com/media/sug-question-candidate/20200728035438859487-1854014.jpg?w=256)
Physical Chemistry
SolutionsWhich of the following solutions will have pH A 2 0 g of NaOH in 500 cm solution C 100 cm solution of 0 1 N Ca OH 13 assuming complete dissociation B 100 cm solution of 0 05 M Ca OH D 4 0 g of NaOH in 500 cm solution
![For a dilute solution containing 2 5 g of a non volatile non electrolyte solute in 100 g of water the elevation in boiling point at 1 atm pressure is 2 C Assuming concentration of solute is much lower than the concentration of solvent the vapour pressure mm of Hg of the solution is take K 0 76 K kg mol A 724 C 736 B 740 D 718 2012 Fe CN Mol Wt 329 in 100 g of](https://media.kunduz.com/media/sug-question-candidate/20200728131022912526-1892241.jpg?w=256)
Physical Chemistry
SolutionsFor a dilute solution containing 2 5 g of a non volatile non electrolyte solute in 100 g of water the elevation in boiling point at 1 atm pressure is 2 C Assuming concentration of solute is much lower than the concentration of solvent the vapour pressure mm of Hg of the solution is take K 0 76 K kg mol A 724 C 736 B 740 D 718 2012 Fe CN Mol Wt 329 in 100 g of
![S rhombic O g SO g AH 297 5 kJ S monoclinic O g SO g AH 300 kJ The above data can predict that 1 Rhombic sulphur is yellow in colour 2 Monoclinic sulphur has metallic lustre 3 Monoclinic sulphur is more stable 4 AH Transition process of S R to S M is endothermic](https://media.kunduz.com/media/sug-question-candidate/20200727184358617621-1664747.jpg?w=256)
Physical Chemistry
SolutionsS rhombic O g SO g AH 297 5 kJ S monoclinic O g SO g AH 300 kJ The above data can predict that 1 Rhombic sulphur is yellow in colour 2 Monoclinic sulphur has metallic lustre 3 Monoclinic sulphur is more stable 4 AH Transition process of S R to S M is endothermic
![4 Solute flows from low concentration to high concentration 1 mole glucose is added to 1 L of water K H O 0 512 K kg mole 1 boiling point of 1 373 512 C 3 99 488 C 2 100 512 C 4 372 488 C tion will be nivod If solution has vapour pressure 340 mm Hg](https://media.kunduz.com/media/sug-question-candidate/20200728130715498899-675498.jpg?w=256)
Physical Chemistry
Solutions4 Solute flows from low concentration to high concentration 1 mole glucose is added to 1 L of water K H O 0 512 K kg mole 1 boiling point of 1 373 512 C 3 99 488 C 2 100 512 C 4 372 488 C tion will be nivod If solution has vapour pressure 340 mm Hg
![18 Liquids A p 360 mm Hg and B pg 320 mm Hg are mixed If solution has vapour pressure 340 mm mole fraction of B in the solution will be 1 3 33 34 2 34 1 4](https://media.kunduz.com/media/sug-question-candidate/20200728125728660467-675498.jpg?w=256)
Physical Chemistry
Solutions18 Liquids A p 360 mm Hg and B pg 320 mm Hg are mixed If solution has vapour pressure 340 mm mole fraction of B in the solution will be 1 3 33 34 2 34 1 4
![A sample of steel weighing 0 30 g was subjected to a chemical reaction to convert its sulphur impurity to H S g The evolved gas required 2 40 ml 0 02 N iodine solution Which of the following statement s is are true A B C A lodine is reduced to iodide B H S is oxidized to S C Steel contain 0 256 of S by weight D The reaction of H S with I is a precipitation reaction rather than a redox reaction](https://media.kunduz.com/media/sug-question-candidate/20201011140755221507-1962451.jpg?w=256)
Physical Chemistry
SolutionsA sample of steel weighing 0 30 g was subjected to a chemical reaction to convert its sulphur impurity to H S g The evolved gas required 2 40 ml 0 02 N iodine solution Which of the following statement s is are true A B C A lodine is reduced to iodide B H S is oxidized to S C Steel contain 0 256 of S by weight D The reaction of H S with I is a precipitation reaction rather than a redox reaction