Solutions Questions and Answers

3 What are the necessary conditions for an element to dissolve in a metal and form a solid solution accordingly Are the following alloys are soluble or insoluble Explain this with the reasons a Cu Ni b Cu Zn c Cu Pb

Which of the following aqueous solution will have the highest freezing point NCERT Pg 58 1 0 1 m NaCl solution 2 0 1 m Sugar solution 3 0 1 m MgCl solution 4 0 1 m AICI solution

The correct option that represents an ideal solution formed upon mixing two liquids is A Amix H 0 Amix V 0 Amix G 0 Amix V 0 Amix B Amix H 0 G 0 C Amix H 0 Amix V 0 Amix G 0 D Amix H 0 Amix V 0 Amix G 0

Mass of solvent 13 467 g Mass of solute 2 064 g Freezing Point of solvent 43 4 degrees Celsius Freezing Point of solute 41 5 degrees Celsius Kf freezing point depression constant 4 53 degree Celsius m Questions a Find Delta T using the freezing points b Find molality of solution w unknown solute already dissolved into solvent c Find moles of unknown solute in solution d Find the molar mass of unknown solute

f Both KCl and acetic acid have values of AT b and AT in water which deviate from the values obtained from the constants K and K and the value of molality of the solutions as the interactions of the two solutes with water are different For the same molality of the solutions of KCl and acetic acid you expect A AT KCI AT acetic acid B AT KC1 AT acetic acid C AT KCI AT acetic acid b D AT KCI AT acetic acid

A solution containing 0 1 mole of glucose in water freezes at 0 2 C The amount of water present in this solution is K H O 1 86K molal O930 g O 1000 g O 90 g 210 g

You could add solid KCl to the solution to precipitate out AgCl s What mass of KCl is needed to precipitate the silver ions from 12 0 mL of 0 240 M AgNO3 solution Express your answer with the appropriate units V

The boiling point elevation constant for toluene is 3 32 k kg mol 1 The normal boiling point of toluene is 110 7 C The enthalpy of vaporization of toluene would be nearly 17 0 kJ mol 1 34 0 kJ mol 1 50 1 kJ mol 1 68 0 kJ mol 1

In the process of reverse osmosis the concentrations of inlet water pure water and discarded water are C C and C3 respectively Which of the following represents the correct relation between them O C C C3 O C C C3 O C3 C C

mass taken as 120 solution of silver is g 2 is 22 The acid ionization hydrolysis constant of Zn 1 0 10 What is the pH of 0 001 M solution of ZnCl 23 If 50 ml of 0 2 M NaCN is mixed with 50 ml of 0 2 M

examples of homogeneous mixtures In contrast to this in a heterogeneous mixture the composition is not uniform throughout and sometimes different components are visible For example mixtures of salt and sugar grains and pulses along with some dirt often stone pieces are heterogeneous mixtures You can think of gasy many more examples of mixtures which you id come across in the daily life It is worthwhile to to a ges Placeg are ons of mixture can be separated by using physical simple such mention here that the components of a Homo SAILLAL CAMERA ethods 2 as Neres

A Solution is prepared in a cold room 4 degree c by dissolving 175 7 g of potassium nitrate in exactly 750 ml of water The resulting solution had a volume of 745 ml 1 Calculate the molarity of the resulting solution

Q 29 4 1 00 26 On addition of 1mL solution of 10 NaCl to 10mL gold solution in the presence of 0 025 g of starch the coagulation is prevented because starch has the following gold numbers O 25

The depression in freezing point of 0 01m aqueous CH3COOH solution is 0 02046 1m urea solution freezes at 1 86 C Assuming molality equal to molarity pH of CH3COOH solution is 1 2 3 3 2 2 3 4 4 2

Lowering of vapour pressure for 1m aqueous solution is 1 08 mm of Hg at 25 C The vapour pressure of pure liquid at 25 C is 10x mm of Hg The value of x will be assuming very dilute solution 2 6 1 4 3 8 4 3

d 0 1 form a pentamer The value of van t Hoff factor i A solute X when dissolved in a solvent associates to for the solute will be a 0 5 c 0 2 b 5 d 0 1 the freezing point of a 0 5 m KC

All on No 26 versible reaction A B 2 C the equilibrium concentrations of A B and C are 2 M 2 M and 4 M respectively then Kc for

Equivalent conductivity BaCl2 H SO4 and HCl are x x2 and x3 Scm eq at infinite dilution If conductivity of saturated BaSO4 solution is x Scm then Ksp of BaSO is 2 3 4 500x x1 x3 2x3 10 x1 82 2x 2 5x10x x x 2x 0 25x of 1

27 How many grams of concentrated nitric acid solution should be used to prepare 250 mL of 2 0M HNO3 The concentrated acid is 70 HNO3 2013 a 90 0 g conc HNO3 b 70 0 g conc HNO3 c 54 0 g conc HNO3 450 g conc HNO

0 A For an ideal binary liquid solution with P Po which relation between X mole fraction of A in liquid phase and YA mole fraction of A in vapour phase is correct YA YB XA XB YAYB XA XB Y Nos X XD

ne 64 x ch 2 Sovent VISON Manna 1 x P x P 0 P P P 9 x 1 Following conclusions can be drawn from equation 2 16 Total vapour pressure over the solution can be related to the r fraction of any one component ft PT P P ii Total vapour pressure over the solution varies linearly with th mole fraction of component 2 By Jaur SOVENT SOTOTE ALO Mole fraction III IF Sater x 0 P 2 1 iii Depending on the vapour pressure of the pure components I and total vapour pressure over solution decreases or increases with the increase of the mole fraction component 1 A plot of p or p versus the mole fractions x and x for a solution gives a linear plot as shown in Fig 2 3 These lines I and II pass through the points for which x and x are equal to unity Similarly the plot line III of Ptotal versus CORRECTION Moles of Moles of Total n XCH CL XCHCH Usin ii U f 2021 06 2100

39 A current of dry air was passed first through a series of bulbs containing a solution of C6H5 NO in ethanol of molality 0 725 and then through a series of bulbs containing pure ethanol T 284 K loss in weight of the solvent bulbs was 0 0685 g Calculate the loss in weight of the solution bulbs A 4 60 g C 2 50 g B 5 20 g D 2 05 g

Which one of the following has greater active mass 1 200 gm of lime stone in 2 lit vessel 2 90 gm of CS liquid in 100 ml vessel 3 56 gm of N gas in 0 5 lit vessel 2 4 1 mole of O gas at STP

4 A solution of sucrose molar mass 342 g mol has 64 been prepared by dissolving 68 5 g of sucrose in 1000 g of water The freezing point of the solution obtained will be K for water 1 86 K kg mol 1 0 570 C 3 0 520 C 68 5 g 1000g FICK HE 342 g mol anya facer ariel Glyen facer GHIA for 68 5 342 X You 2 0 372 C 01 1 86 x 62S 2 0 372 C 342 T T 4 0 372 C 4 0 372 C For the reaction 2A B 3C D which of the following 65 3fff 2A B 3C D K 1 86 K kg mol 1 0 570 C 3 0 520 C

A student prepares four 0 10 molal aqueous solutions each containing one of the solutes given below Which solution has the lowest freezing point K4 Fe CN 6 KOH CH3COOH

The conductivity of a saturated solution of Ag PO4 is 9 x 10 6 S m and its equivalent conductance is 1 50 10 4 Sxm equivalent The K of Ag3PO4 is A 4 32 10 18 C 8 64 10 13 B 1 8 10 9 D 4 32 10 13

19 25 3 g of sodium carbonate Na CO3 is dissolved in enough water to make 250 mL of solution If sodium carbonate dissociates completely molar concentration of sodium ion Na and carbonate ions CO are respectively Molar mass of Na CO3 106 g mol 1 0 477 M and 0 477 M 2 0 955 M and 1 910 M 3 1 910 M and 0 955 M 4 1 90 M and 1 910 M

A dilute aqueous solution of an organic compound soluble in water is formed by dissolving 2 35 g of the compound in water to form 0 250 L of solution The resulting solution has an osmotic pressure of 0 605 atm at 25 C Assuming that the organic compound is a nonelectrolyte what is its molar mass 380 g mol 360 g mol 180 g mol

dissolves like When a solid solute is added to the solvent some solute dissol and its concentration increases in solution This process is known dissolution Some solute particles in solution collide with the solid sol particles and get separated out of solution This process is known crystallisation A stage is reached when the two processes occur att same rate Under such conditions number of solute particles go into solution will be equal to the solute particles separating out a a state of dynamic equilibrium is reached Solute Solvent Solution 2 1

Mole fraction of component A in vapour phase is X and mole fraction of component A in liquid mixture is x2 P vapour pressure of pure A Po vapour pressure of pure B then the vapour pressure of liquid mixture is Question Type Single Correct Type 1 2 3 P X2 X PX1 X2 PBX1 X2

Which of the following aq solution will have highest boiling point 0 1 m Sucrose 0 1 m Glucose 0 1 m NaCl 0 1 m CaCl

Total vapour pressure of mixture of 1 mol P 150 torr and 2 mol Y P 300 torr is 24 torr In this case 1 There is a negative deviation from Raoult s law 2 There is a positive deviation from Raoult s law 3 There is no deviation from Raoult s law 4 Can not be decided

8 9 11 100 ml of its 0 05 N solution is a 2 9424 g c 1 4712g 12 a 2 N c 39 6 N 10 Molarity of 0 2N H SO4 is a 0 2 c 0 6 36g water and 828g ethyl alcohol form an ideal solution The mole fraction of water in it is MP PMT 2003 a 1 0 c 0 4 Conc H SO4 has a density of 1 98 gm ml and is 98 H SO4 by weight Its normality is MP PET 2002 c 77 68 JIPMER 2002 b 0 4904 g d 0 2452 g 20 80 d b 0 7 d 0 1 The mole fraction of water in 20 aqueous solution of H O is EAMCET 1993 a b 19 8 N d 98 N b 0 4 d 0 1 68 77 80 20 prepare How many gm of H SO is present in 0 25 gm mole of H SO4 CPMT 1990 a 24 5 c 0 25 b 2 45 d 0 245 13 1 0 gm of pure calcium carbonate was found to require 50 ml of dilute HCl for complete reaction The strength of the HCl solution is given by CPMT 1986 a 4 N c 0 4 N b 2 N d 0 2 N 14 10 grams of a solute is dissolved in 90 grams of a solvent Its mass percent in solution is a 0 01 b 11 1

The above set up has been repeated four times wit 4 different aqueous solution of same non volati solute with different concentrations The loss weight of solution in container is in order D B C A Arrange A B C D in terms of concentrati of solute 1 D B C A 3 U 1 C Moist Air 2 A B C D 1

101 A bottle of H PO solution contains 70 w w acid If the density of the solution is 1 54 g cm the volume of the H3PO4 solution required to prepare 1 L of 1 N solution is 1 90mL 2 45 mL 3 30 mL 4 23 mL

Calculate the volume of H g at 273 K and 2 00 atm that will be formed when 475 mL of 0 725 M HC1 olution reacts with excess Mg to give hydrogen gas and aqueous magnesium chloride 0 56 L II V 7 1 12 L 1 93 L 2 24 L 3 86 L 22 49

100 ml of 0 1 M acetic acid is completely neutralized using a standard solution of NaOH The volume of ethane obtained at STP after the complete electrolysis of the resulting solution is A 112 ml C 224 ml B 56 ml decomposition by coment D 560 ml

In a reversible reaction A B 2 C the equilibrium concentrations of A B and C are 2 M 2 M and 4 M respectively then Kc for the reaction is 1 2 4

4 Calculate the concentration of Ni in the solution prepared by mixing a 50 mL 0 03 M Ni with 50 0 mL 0 05 M EDTA b 50 mL 0 03 M Ni with 30 0 mL 0 05 M EDTA The mixture is buffered to pH 3 0 Kr 4 2x10 8 pH 3 04 2 5x10

Ex 25 a Calculate the strength of 20 V of H O in terms of i normality ii grams per litre iii molarity and iv percentage b Calculate the volume strength of 3 58 N H O solution

37 For the first order reaction 1 Degree of dissociation equals to 1 ekt 2 A straight line is obtained by the graph between reciprocal of conc and time 3 Time take of 75 completion of the reaction is three times of t 2 4 Dimension of pre exponenational factor in Arrhenious equation is T 37 4 16 da 1 fari 2 atat teffen fag a El 1 ek fic ad de 844 F 42 4G Y FATE M 3 3 75 1 2 44 ya 4 right pics at fault T

1 0593 g of solid metallic copper is fully reacted with nitric acid to produce copper II nitrate Copper II nitrate reacts with sodium hydroxide according to the following reaction Cu NO3 2 2 NaOH Cu OH 2 some not important side products What volume in mL of 6 0 M sodium hydroxide is required to fully react with the copper II nitrate produced Molar mass of copper 63 546 g mol Report your answer in mL with the correct number of significant digits Number Units

In water saturated air the mole fraction of water vapour is 0 02 If the total pressure of the saturated air is 1 2 atm the partial pressure of dry air is 1 1 17 atm 2 1 76 atm 3 1 27 atm 4 0 98 atm

32 The vapour pressures of pure liquids A and B respectively are 600 torr and 500 torr In a binary solution of A and B mole fraction of A is 0 25 then total pressure of the solution in torr will be 1 625 2 530 3 525 4 575

solution containing 30 g of non volatile solute exactly in 90 g of water has vapour pressure of 2 8 kPa at 298 K Further 18 g of water is then added the solution and the new vapour pressure becomes 2 9 kPa at 298 K Calculat i molar mass of the solute ii vapour pressure of water at 298 K

Osmotic pressure of toluene solution that contains different concentrations of polystyrene is studied at 300K to determine the molecular mass of the polymer It is observed that the osmatic pressure being colligative property changes according to the equation 11 1 2x10 C 24x10 c where osmotic pressure is measured in units of atmospheres concentration C is measured in units of g L For al Calculations R 0 082 atm L mol K Hence molecular mass is obtained as ax10 What is the value of a b to nearest integer

Two beakers of capacity 500 ml were taken One of these beakers labelled as A was filled with 400 mL water whereas the beaker labelled B was filled with 400 ml of 2 M solution of NaCl At the same temperature both the beakers were placed In closed containers of the same material and same capacity as shown in figure A B A C Water At a given temperature which of the following statement is correct about the vapour pressure of pure water and that of NaCl solution B NaCl solution Vapour pressure In container B is more than that in container A Vapour pressure in container B is less than that In container A Vapour pressure Is equal in both ers

A B C Piston A Fresh water A SPM Piston B Concentrated sodium chloride solution in water B Water will move from side A to side B if a pressure lower than osmotic pressure is applied on piston B Water will move from side B to side A if a pressure greater than osmotic pressure is applied on piston B Water will move from side B to side A if a pressure equal to osmotic pressure is applied on piston B

If 40 ml of N reacts with 60 ml of H to form NH3 and if 10 ml of NH3 is produced then find percentage yield in the reaction Question Type Single Correct Type 1 2 3 10 25 50

3 226 4 g mol 4 445 9 g mol 9 Which of the following aqueous solution have highest freezing point 1 0 1 m NaCl 3 0 2 m Sucrose INCERT Pg 58 2 0 3 m Na SO4 4 0 1 m urea