The possible molecular mass of MgSO 4 in its dilute solution can be
Two solutions of KNO 3 and CH 3 COOH are prepared separately. The molarity of both is 0.1 M and osmotic pressure is P 1 and P 2 respectively. The correct relationship between the osmotic pressures is
Which solution will show maximum elevation in boiling point?
Increasing order of Van’t Hoff factor. I. NaNO 3 II. BaCl 2 III. K 3 [Fe(CN) 6 ] IV. C 6 H 12 O 6 V. HCl
Isotonic solutions are those which have
The osmotic pressure of a non-aqueous solution is measured by
Which of the following solutions has the maximum freezing point?
Osmosis is the spontaneous flow through a semi-permeable membrane of
The osmotic pressure of a sugar solution at 24 ° C is 2.5 atm. The concentration of the solution in mole per litre is
A solution containing 8.6 g urea in 1 L was found to be isotonic with a 5% (weight/volume) solution of an organic non-volatile solute. The molecular weight of latter is
pH of a 0.1 M monobasic acid is found to be 2. Hence, its osmotic pressure at a given temperature T K is
A 5% solution of cane sugar (molecular weight = 342) is isotonic with 1% solution of substance X. The molecular weight of X is
According to Henry’s law, the solubility of a gas in given volume of liquid increases with increase in :
CD: Fixed wall, EF : SPM, Fixed wall : allows the pressure transfer but no mass transfer. If 16 gm Helium present in ABCD chamber calculate the length of this chamber in cm if no osmosis takes place through SPM EF. Assume 75% ionization of K 4 F e ( C N ) 6 . ( R = 0 . 0821 L – a t m / m o l – R )
100 g of C 6 H 12 O 6 (aq) solution has vapour pressure is equal to 40 torr at certain temperature. Vapour pressure of H 2 O(1) is 40.18 torr at same temperature. If this solution is cooled to -0.93 ° C, what mass of ice will be separeted out? (K f = 1.86 kg mol -1 )
Equimolal solutions of KCI and compound X in water show depression in freezing point in the ratio of 4:1 . Assuming KCI to be completely ionized, the compound X in solution must
The use of common salts, e.g., NaCl or CaCl 2 anhydrous, is made to clear snow on the roads. This causes:
Which salt shows maximum osmotic pressure in its 1 m solution?
Increasing order of osmotic pressure. I. 0.1 M glucose II.1% urea solution III. 0.1 M common salt
Increasing amount of solid HgI 2 is added to 1 L of an aqueous solution containing 0.1 mol KI. Which of the following graphs do represent the variation of freezing point of the resulting solution with the amount of HgI 2 added?
Which statement is/are correct about osmotic pressure ( π ), volume (V) and temperature (T)?
The freezing point of 1% aqueous solution of calcium nitrate will be
Boiling point elevation is
Semi-permeable membrane is chemically
The vapour pressure (VP) of a dilute solution of non-volatile solute is P and the VP of a pure solvent is P ° . The lowering of the VP is
The Van’t Hoff factor of NaCl assuming 100% dissociation is
The value of K f for water is 1.86 K .Kg/mole, calculated from glucose solution. The value of K f for water calculated for NaCl solution is
What will be the molecular weight of NaCl determined experimentally following elevation in the boiling point or depression in freezing point method?
The factor ∆ T f K f represents
Which of the following solutions will have the highest boiling point?
Which of the following solutions has the minimum freezing point?
The freezing point of a 0.05 molal solution of non-electrolyte in water is (K f =1.86 K m -1 )
The molal elevation constant of water = 0.52 K m -1 . The boiling point of 1.0 molal aqueous KCI solution (assuming complete dissociation of KCI) should be
The molal elevation constant of water = 0.52 K m -1 . The boiling point of 1.0 molal aqueous KCI solution (assuming complete dissociation of KCI) should be
An aqueous solution freezes at -0.186 ° C (K f = 1.86 ° ; K b = 0.512 ° ).What is the elevation in boiling point?
For a given value of degree of dissociation, which of the following have correct Van’t Hoff factor?
1 mole of urea is dissolved in 1 kg of each of solvent A, B,C and D seperately and different solutions are prepared. Solvent Solution Boiling point (K) A I T p B II T q C III T x D IV T y Boiling point order is T q <T y <T p <T x . Identify the correct statement(s). Assume boiling points of solvents are almost same.
1 lit of ideal solution containing 1 mole of non – volatile non – electrolyte at 273 k exerts osmotic pressure equal to
Identify the correct statements
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.
The azeotropic solution of two miscible liquids:
A very small amount of a non-volatile solute (that does not dissociate) is dissolved in 56.8 c m 3 of benzene (density = 0.889 g c m – 3 ). At room temperature vapour pressure of this solution is 98.88 mm Hg while that of benzene is 100mm Hg. Find the molality of this solution. If the freezing temperature of this solution is 0.73 degree lower than that of benzene, what is the value of molal freezing point depression constant of benzene? (1997-3 Marks)
In the given diagram CD : Fixed wall, EF : SPM, Fixed wall : allows the pressure transfer but no mass transfer. If 16 gm Helium present in ABCD chamber calculate the length of this chamber in cm if no osmosis takes place through SPM EF. Assume 75% ionization of K 4 [ F e ( C N ) 6 ] . ( R = 0.0821 L − a t m / m o l − R )
The ratio of mole fraction of A at point P and point Q in following graph is:
10 ml of F e C 2 O 4 solution requires 30 ml of 0.4 M K M n O 4 solution in acidic medium for titration. 25 ml of the same F e C 2 O 4 solution is mixed in some water to make a solution containing 900g of water. Which of the following is/are true for this solution? K f for water = 1 . 8 / Kkg / mol )
20 g of napthoic acid C 11 H 8 O 2 . Dissolves in 50 g of benzene K f = 1 .72 K kg mol − 1 shows a depression in freezing point of 2K. The Van’t Hoff factor is
Liquids A and B form ideal solution for all compositions of A and B at 25°C. Two such solutions with 0.25 and 0.50 mole fractions of A have the total vapor pressures of 0.3 and 0.4 bar, respectively. What is the vapor pressure of pure liquid B in bar?
A compound has the empirical formula C 10 H 8 Fe. A solution of 0.26g of the compound in 11.2 g of benzene (C 6 H 6 ) boils at 80.26°C. The boiling point of benzene is 80.10°C; the K b is 2.53°C/molal. What is the molecular formula of the compound?
At 20°C, the vapor pressure of 0.1 molal aqueous solutions of urea is 0.03 mm less than that of water, and the vapor pressure of 0.1 molal solutions of KCl is 0.0594 mm less than that of water. The apparent percentage dissociation of KCl in water at the given temperature is (Neglect the moles of solute particles in comparison to the moles of water in both solutions).
When 0.01 moles of solid HgI 2 is completely dissolved in a solution containing 0.02moles of KI in 100g of H 2 O, the depression in the freezing point of the solution is (K f for H 2 O is 1.86 K.Kg mol -1 )
30 mL of CH 3 OH (d = 0.8 g/cm3) is mixed with 60 mL of C 2 H 5 OH (d = 0.92 g/cm 3 ) at 25°C to form a solution of density 0.88 g/cm 3 . Select the correct option(s) :
Boiling point composition diagram of the liquid-vapour equilibrium for A and ^B is shown in the figure. If a binary liquid mixture of A and B is distilled fractionally, which of the following would be correct observation?
Two components A and B form an ideal solution. The mole fraction of A and B in ideal solution are X A and X B while that of in vapour phase, these components have their mole fractions as Y A and Y B . Then, the slope and intercept of plot of 1 Y A vs 1 X A will be:
The relative decrease in VP of an aqueous glucose dilute solution is found to be 0.018. Hence, the elevation in boiling point is X 0 C,the value of X is (it is given 1 molal aqueous urea solution boils at 100. 54 ° C at 1 atm pressure)
The molal boiling point constant for water is 0.5 13 K m -1 . When 0.1 mole of sugar is dissolved in 200.0 g of water, the solution boils under a pressure 1.0 atm at
From a measurement of the freezing point depression of benzene, the molecular weight of acetic acid in a benzene solution was determined to be 100. The percentage association of acetic acid is
Increasing order freezing points. I. 0.1 M ethanol II. 0.1 M Ba 3 (PO 4 ) 2 III. 0.1 M Na 2 SO 4
If a thin slice of sugar beet is placed in concentrated solution of NaCl, then
When common salt is dissolved in water
A teacher one day pointed out to his students the peculiar fact that water is a unique liquid which freezes exactly at 0 ° C and boils exactly at 100 ° C. He asked the students to find the correct statement based on this fact.
A perfectly semi-permeable membrane when used to separate a solution from its solvent permits through it the passage of
Which is a colligative property?
The osmotic pressure of a dilute solution is not given by
The correct relationship between the boiling points of very dilute solutions of AlCl 3 (t 1 ) and CaCl 2 (t 2 ),having the same molar concentration, is
The osmotic pressure of a solution increases if
Equimolal solutions A and B show depression in freezing point in the ratio 2 : 1. A remains in the normal state in solution. B will be
The solutions in which the blood cells retain their normal shape, with regard to the blood, are
What would be the freezing point of aqueous solution containing 17 g of C 2 H 5 OH in 1000 g of water. K fH2O =1.86 K m-1.
The osmotic pressure of 40% (weight/volume) urea solution is 1.64 atm and that of 3 .42% (weight/volume) cane sugar is 2.46 atm. When equal volumes of the above two solutions are mixed, the osmotic pressure of the resulting solution is
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 molecular weight of solute is
The molal elevation constant of water = 0.52 K m -1 . The boiling point of 1.0 molal aqueous KCI solution (assuming complete dissociation of KCI) should be
If a 6.84% (weight/volume) solution of cane sugar (molecular weight – 342) is isotonic with 1.52% (weight/ volume) solution of thiocarbamide, then the molecular weight of thiocarbamide is
The Van’t Hoff factor of very dilute solution of Ca(NO 3 ) 2 is
Lowering in vapour pressure is highest for
Which of the following will have the highest boiling point at I atm pressure?
The molal depression constant for water is 1.86 ° C. The freezing point of a 0.05-molal solution of a non-electrolyte in water is
The freezing point of a solution prepared from 1.25 g of non-electrolyte and 20 g of water is 271.9 K. If the molar depression constant is 1.86 K mol -1 , then molar mass of the solute will be
The osmotic pressure of blood is 7.40 atm at 27 ° C. The number of mol of glucose to be used per litre for an intravenous injection that is to have the same osmotic pressure as blood is
The osmotic pressure of blood is 7.40 atm at 27 ° C. The number of mol of glucose to be used per litre for an intravenous injection that is to have the same osmotic pressure as blood is
PtCI 4 .6H 2 O can exist as a hydrated complex; 1 m aqueous solution has the depression in freezing point of 3.72 K. Assume 100% ionization and K f (H 2 O) = 1.86 Km -1 , then the complex is
Which of the following solutions (1 molal) will have the maximum freezing point, assuming equal ionization in each case?
The depression in freezing point of 0.01 m aqueous CH 3 COOH solution is 0.02046 ° . 1 m urea solution freezes at -1 .86 ° C. Assuming molality equal to molarity, pH of CH 3 COOH solution is
The lowering of vapour pressure due to a solute in a 1 m aqueous solution at 100 ° C is
Which has the maximum osmotic pressure at temperature T?
FeCl 3 on reaction with K 4 [Fe(CN) 6 ] in aqueous solution gives blue colour. These are separated by a semi-permeable membrane AB as shown. Due to osmosis, there is
12.2 g of benzoic acid (Mw = 122) in 100 g benzene has depression in freezing point 2.6 ° ; K f = 5.2 ° kg mol -1 . If there is 100% polymerzation, the number of molecules of benzoic acid in associated state is
25 mL of an aqueous solution of KCI was found to require 20 mL of 1 M AgNO 3 solution when titrated using a K 2 CrO 4 as indicator. The depression in freezing point of KCI solution with 100% ionization will be: [K f = 2.0 ° C mol -1 kg and molarity = molality]
X 3 Y 2 (i = 5) when reacted with A 2 B 3 (i = 5) in aqueous solution gives brown colour. These are separated by a semipermeable membrane AB as shown. Due to osmosis there is:
According to henry’s law, the partial pressure of gas (P g ) is directly proportional to mole fraction of gas in liquid solution, P gas = K H . X gas , where K H is Henry’s constant. Select incorrect statement?
1 kg of water under a nitrogen pressure of 1 atmosphere dissolves 0.02 gm of nitrogen at 293 K. Calculate Henry’s law constant:
For an ideal binary liquid system
A certain mass of a substance when dissolved in 100 g C 6 H 6 lowers the freezing point by 1.28°C. The same mass of solute dissolved in 100 g of water lowers the freezing point by 1.40°C. If the substance has normal molecular mass in benzene and is completely dissociated in water, into how many ions does it dissociate in water? K f for H 2 O and C 6 H 6 are 1.86 and 5.12 K mol -1 kg respectively.
The van’t Hoff factor of NaCl assuming 100% dissociation is :
The van’t Hoff factor (i) for a dilute aqueous solution of glucose is :
The van’t Hoff factor (i) for a dilute solution of K 3 [Fe(CN) 6 ] is:
The ratio of the value of any colligative property for KCl solution to that of sugar solution is
Which of the following statement(s) is/are correct, if intermolecular forces in liquids A, B and C are in the order of A < B< C?
For a non-volatile solute
1 mol benzene (P ° benzene = 42 mm) and 2 mol toluene (P ° toulene = 36 mm) will have
Osmotic pressure of a solution is
Consider the following solutions: I. 1 M sucrose II. 1 M KCI III. 1 M benzoic acid in benzene IV. 1 M (NH 4 ) 3 PO 4 Which of the following is/are true?
The osmotic pressure of a solution depends on
A graph showing variation of osmotic pressure (n) versus molar concentration (C) of an aqueous solution at temperature T is given below: The slope of the line doesn’t represent:
The azeotropic solutions of two miscible liquids:
A solution containing 500 g of a protein per litre is isotonic with a solution containing 3.42g sucrose per litre. The molecular mass of protein in 5 x 10 x , hence x is.
0.2 M aq. solution of KCl is isotonic with 0.2 M K 2 SO 4 at same temperature. What is the van’t Hoff factor of K 2 SO 4 ?
Identify cirrect statement. With dilution vant hoff factor for
