Solutions Questions and Answers

The boiling point in C of 0 1 molal aqueous solution of CuSO 5H 0 at 1 bar is closest to Given Ebullioscopic molal boiling point elevation constant of water K 0 512 K Kg mol A 100 36 B 99 64 C 100 10 D 99 90

When equimolar aqueous solutions of glucose sodium chloride and barium nitrate are compared the vapour pres the solutions will be in the following order A B Glucose NaCl Ba NO3 2 Glucose NaCl Ba NO3 2 Ba NO3 2 NaCl Glucose NaCl Ba NO3 2 Glucose

300K 400K Vapour pressure of liquid at 300 K is 20 mm of Hg and 400 K is 40 mm of Hg Very long time after opening the stopper the total pressure will be 1 A Question Type Single Correct Type 2 3 20 mm of Hg B 40 mm of Hg 30 mm of Hg

MODELLING SATURATED and UNSATURATED SOLUTIONS 1 Draw small circles inside each beaker to represent particles of solute Beaker A should represent a model of Unsaturated Solution while Beaker B is for Saturated Solution Color them 2 Explain briefly how Saturated and Unsaturated Solution differs from each other using the model you draw above Write your answer inside the box Saturated Solution vs Unsaturated Solution

A drop of a patient s blood is placed in pure water and the red blood cells RBCs rise to the top of the beaker This is likely due to the patient suffering from which illness and what does this say about the specific gravity of their RBCs Dehydrated 1 01 Anemia 1 05 Anemia 1 05 Anemia 1 05 Dehydrated 1 01

On the basis of information given below mark the correct option Information i In bromoethane and chloroethane mixture intermolecular interaction of A A and B B type are nearly same as A B type interactions ii In ethanol and acetone mixture A A or B B type intermolecular interactions are stronger than A B type interactions iii In chloroform and acetone mixture A A or B B type intermolecular interactions are weaker than A B type interactions A Solution ii and iii will follow Raoult s law B Solution i will follow Raoult s law C Solution ii will show negative deviation from Raoult s law

A doctorders 20 mg of morphine The vial of morphine on hand is 40 mg per 4 0 ml How many militers of morphine should you administer to the patient Express your answer to two significant figures and include the appropriate units A

d volume of solution is different from sum of volume of solute and solvent 2002 34 A solution contains non volatile solute of molecular mass M Which of the following can be used to calculate the molecular mass of solute in terms of osmotic pressure a M VR TU m RT b M 1 2 4 TC m c M 1 TR 2 V m TC d M Vous vegale rough m

c 0 1 M Mole fraction of solute in an aqueous solution which 12 0 004 m d 0 996 255 5 it 0 10 4 0 Luilo colute is dissolved in two mole Mast boils at 100 104 Kb for H O 0 52 K molality 3 6x10 3 c 5 6 10 3 m x X 1000 1

28 A solution containing 10 g per dm of urea molecular mass 60 g mol is isotonic with a 5 solution of a nonvolatile solute is b 250 g mol 1 d 350 g mol 1 2006 a 200 g mol 1 c 300 g mol 29 The mole fraction of the solute in one molal aqueous solution is a 0 009 b 0 018

32 A solution of urea mol mass 56 g mol boils at 100 18 C at the atmospheric pressure If K and K for water are 1 86 and 0 512 K kg mol respectively the above solution will freeze at a 0 654 C c 6 54 C b 0 654 C d 6 54 C 2005 33 A solution containing components A and B follows Raoult s law a 4 A Rattraction for in

a c 2 d 3 NEET II 2016 4 Which one of the following is incorrect for ideal solution a AH 0 c AP P P obs d AG 0 b AU 0 calculated by Raoult s law NEET II 2016 9 5 Which of the following statements about the an ideal 1

molecular mass Which one of the following electrolytes has the same value of van t Hoff factor i as that of Al2 SO4 3 if all are 100 ionised a AI NO c K SO b K Fe CN d K Fe CN 2015 Cancelled 10 Which of them is not equal to zero for an ideal solution

7 What is the mole fraction of the solute in a 1 00 m aqueous solution a 1 770 c 0 0177 b 0 0354 d 0 177 2015 2011

AP EAMCET 2020 Room temperature phase diagram of CO is given below If at 3 8 atm the temperature of the system is decreased from 57 C to 78 C what type of phase transformation will the system undergo Sassu sg sy ardy Dad Options 2 P 3 CO atus ado de ara dar gau dros gados 3 8 atm aa 57 C 78 C 50 03 od A Solid Didde 5 2 atm 1 Condensation 1 BOSS Bodu T Sublimation 1 78 C 57 C C Liquid u Bodi Gas Jadi T Deposition reverse sublimation 5 856 60 Bow D Condensation then solidification Diagram not drawn to scale dong Speus habudas

Which of the following solutions have the same molar concentration K 39 20 g of NaOH in 200 mL of solution O 0 5 mol of KCI in 200 mL of solution 40 g of NaOH in 100 mL of solution 20 g of KOH in 200 mL of solution

Question Number 156 Question Id 8135612236 Question Type MCQ Display Question Number Yes Is Question Mandatory No Single Line Question Option No Option Orientation Vertical Among the following which statement is incorrect regarding mole fraction x 3rd arno x 50 Dowodow sode 58 58 500 Options 1 0 2 x 1 3 0 x 1 2 x 2

A solution of H SO4 in water is found to have a density of 1 0245 g ml A 20 ml sample from the stock solution required 1 2 g NaOH for complete neutralisation Then which of the given concentration term approx value is not correct about the stock solution The molarity of the stock solution is 0 75 M The molality of the stock solution is 0 79 m The mole fraction of H SO4 in the stock solution is 0 014 The mass percent of H SO4 in the stock solution is 23 7

3 5 moles of A 6 moles of Z are mixed with sufficient amount of C to finally produce F Then find the maximum moles of F which can be produced Assuming that the product formed can also be reused Reactions are A 2Z B B C Z F A 3 moles i ii B 4 5 moles L R n S C

Question Number 126 Question Id 7512365246 Question Type MCQ Option Shuffling Yes Display Question Number Yes Single Line Question Option No Option Orientation Vertical In which of the following molecules the central atom has expanded octet 1 3 800 3 0 365rok v Dyje sudo Options a SCI b CO c PF d e b c d c d H SO4 BCI d e b d e

Consider following cases 1 2M CH3COOH solution in benzene at 27 C where there is dimer formation to the extent of 100 II 0 5 M KCI aqueous solution at 27 C which ionises 100 Which is are true statement s Question Type Single Correct Type 1 Both are isotonic 2 I is hypertonic 3 Il is hypertonic

An aqueous salt solution is formed by adding 53 1 g sodium sulfate to 18 9 mol water What is the boiling point in C of this salt solution this is NOT the AT Kb H O 0 51 C m Recall that ionic solutes can form 1 2 3 or more ions when dissolved in a solvent

6 Following is the titration curve of two weak acids HA and HB 5 millimoles each titrated against strong base NaOH 0 1M pH 12 10 8 654 2 1 1 H Het 1 1 50ml 75ml volume of NaOH The pK of HB acid is a 1 3 2 4 3 5 1 25ml

Vapour pressure of a pure solvent at 90 C is 1020 torr A solution of 0 1 m concentration has a vapour pressure of 1000 torr What is the molecular weight of solvent 1 100 2 200 3 150 4 250

30 A solution has a 1 4 mole ratio of pentane to hexane tandThe vapour pressure of the pure hydrocarbons at 20 C are 440 mm of Hg for pentane and 120mm of Hg for hexane The mole fraction of pentane in the vapour phase would be mone AIPMT Prelims 2005 1 0 549 L 2 0 200 3 0 786 4 0 478 L S S

c 1 2 25 Which of the given solutions has highest osmotic pressure d 1 3 disz b 1 N Ba NO3 2 1 N Th NO3 4 a 1 N NaNO3 c 1 N AI NO3 3 26 The amount of ice that will separate out on cooling a glycol in 200 g t

Mass of non volatile solute X which should be dissolved in 58 g of acetone to reduce its vapour pressure to 90 will be Atomic mass of X 4 0 8 g 4 g 0 4 g

Under the same conditions how many mL of 1 M KOH and 0 5 M H SO solutions respectively when mixed for a total volume of 100 mL produce the highest rise in temperature O 67 33 O 33 67 O 40 60

90 180 Mark for Review Solubility of gas in liquid increases with Increase in temperature Decrease in temperature Increase in pressure Both 2 and 3

Solubility of a metal M sulphide MS in water is 10 10 The pH of the medium needed to prevent precipitation of this sulphide using 0 1 M H S KaxKaz a XK of H S 10 20 from 0 1 M solution of M is 1 1 3 3 2 2 4 4

undergoes a reversible trimerization when dissolved in a certain solvent The boiling point elevation of its 0 1 molal solution was found to be identical to the boiling point elevation in case of a 0 08 molal solution of a solute which neither undergoes association nor dissociation To what percent had the solute S undergone trimerization 1 30 3 50ST 2 40 502

The vapor pressures of pure acetone and pure water at 25 C are 230 and 23 8 mmHg respectively Which of the below ideal solutions made by mixing different ratios of acetone and water has the lowest total vapor pressure at 25 C a 2 1 acetone to water b 10 1 acetone to water C 1 1 acetone to water d 1 2 acetone to water e 1 10 acetone to water

is in 500 mL of 6 w V urea solution is mixed with 500 mL of 18 w V glucose solution and final volume of mixture becomes 2 L after addition of water The osmotic pressure of final 2 L solution at 27 C is 5yR The value of y is R universal qas constant 20 colution

Equimolar solutions of the following were prepared in water separately Which one of the solutions will 4 SrCl record the highest pH 1 BaCl 2 MgCl 3 CaCl

A thermocouple is placed in a large heated duct to measure the temperature of the gas flowing through the duct The duct walls are at 425 C and the thermocouple indicates a temperature of 170 C The heat transfer coefficient from the gas to the thermocouple is 150 W m C The emissivity of the thermocouple material is 0 43 What is the temperature of the gas

13 The boiling point of 0 2 mol kg solution of Xin water is greater than equimolal solution of Y in water Which one of the following statements is true in this case 2015 a Molecular mass of X is greater than the molecular mass of Y b Molecular mass of X is less than the molecular mass of Y c Y is undergoing undergoes no change d X is undergoing dissociation in water dissociation in water while X

21 21 A solution containing 4 g of a non volatile organic solute per 100 mL was found to have an osmotic pressure equal to 500 cm of mercury at 27 C The molar mass of solute is a 14 97 c 1697 149 7 d 1 407

17 0 Which of the following has been arranged in order of decreasing freezing point A 0 05 M KNO3 0 04 M CaCl2 0 140 M sugar 0 075 M CuSO4 B 0 04 M BaCl2 0 140 M sucrose 0 075 M CuSO4 0 05 M KNO3 C 0 075 M CuSO4 0 140 M sucrose 0 04 M BaCl2 0 05 M KNO3 0 075 M CUSO4 0 05 M NaNO3 0 140 M sucrose 0 04 M BaCl2

21 22 1 S S S3 S4 2 S S3 S4 3 S S3 S S4 4 S4 S S3 S The solubility products of MA MB MC and MD are 1 8 10 10 4 x 10 3 4 10 5 and 6 x 10 5 respectively If a 0 01 M solution of MX is added dropwise to a mixture containing A B C and D ions then the one to be precipitated first will be 1 MA 2 MB 3 MC 4 MD The addition of NaCl to AgCl decreases the solubility of AgCl because 1 solubility product decreases S

Select the incorrect statement O For solid liquid equilibrium there is only one temperature at 1 atm at which both the phases can coexist O Vapour pressure depends on temperature For dissolution of solids in liquids the solubility is constant at a given temperature For dissolution of gases in liquids the concentration of a gas in liquid is independent to the pressure of the gas over the liquid

The vapour pressures of pure liquids A and B are 400 and 600mmHg respectively at 298K on mixing the two liquids the sum of their initial volumes is equal to the volume of the final mixture The mole fractional of liquid B is 0 5 in the mixture The vapour pressure of the final solution the mole fraction of components A and B in vapour phase respectively are 1 500mm Hg 0 5 0 5 3 450mm Hg 0 5 0 5 2 450mm Hg 0 4 0 6 4 500mm Hg 0 4 0 6

The solution of 2 5g of a non volatile substance in 100g of benzene boiled at a temperature 0 42 C higher than the b p of pure benzene Calculate mol wt of the substance K of benzene is 2 67 K kg mole polving 10g of urea in 90g water at 303K

Relative lowering of vapour pressure is independent of the nature of the solute and the solvent The relative lowering of vapour pressure is a colligative property Vapour pressure of a solution is lower than the vapour pressure of the solvent The relative lowering of vapour pressure is directly proportional to the original pressure

3 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 amount of solute is much lower than the amount of solvent the vapour pressure mm of Hg of the solution is take K 0 76 K kg mol 1 724 2 740 3 710 4 718

Solid cobalt II sulfate is slowly added to 50 0 ml of a ammonium carbonate solution until the concentration of cobalt II ion is 0 0116 M The maximum amount of carbonate remaining in solution is M

a directly proportional to the mole fraction of the solute b inversely proportional to the mole fraction of the solute c inversely proportional to the mole fraction of the solvent d directly proportional to the mole fraction of the solvent

release more energy upon electron gain are 1 CI S and Li 2 F S and Li 55 5g of zinc is treated separately with an excess of 1 dilute hydrochloric acid and 2 aqueous sodium hydroxide The ratio of the volumes of H evolved in these two reactions is 1 1 4 2 1 1 3 1 2 3 CI Se and Na 4 F Se and Na 4 2 1

States of Matter 133 Equal volume of two gases A B diffuse through a porous pot in 40 and 10 seconds respectively If the molar mass of A is 100 then calculate the molar mass of gas B 1 10 g mol 3 6 25 g mol 2 8 5 g mol 4 4 g mol

A solution contains 0 20 M Ag and 0 20 M Cu You then add concentrated Kl solution i e ignore volume changes What is the concentration of iodide ion I that causes the MORE soluble species to begin precipitating Ksp for Agl 4 22 x 10 17 Ksp for Cul 1 39 x 10 12 the answer should be entered with 3 significant figures do not enter units give answer in scientific notation valid notation examples include 1 23e 8 and 1 23e8 and 1 23e 4 and 1 23e0 Selected Answer ice

0 004 molar solution of Na2SO4 is isotonic with 0 01 molar solution of glucose at same temperature then calculate degree of dissociation of Na2SO4 Question Type Single Correct Type 1 100 2 75 2 25