187 + Interview Questions in DILUTE-SOLUTION IN GENERAL AWARENESS Page 2 InterviewSolution

51.	6.0 g of urea (molecules mass = 60)was dissolved in 9.9 moles of water. If the vspour presssure of pure water is `P^(@)`, the vapour pressure of solution is :A. 0.10 `P^(@)`B. 1.10 `P^(@)`C. 0.90 `P^(@)`D. 0.99 `P^(@)`
Answer» Correct Answer - d

Discussion

52.	Which solution has the highert vapour presssure ?A. 0.02 M NaCl at `50^(@)`CB. 0.03 M sucrose at `15^(@)`CC. 0.005 m CaCl_(2) at `500 ^(@)C`D. 0.005 M` CaCl_(2) "at" 25^(@)C`
Answer» Correct Answer - c

Discussion

53.	One mole of a soulte A is dissolved in a given volume of a solvent. The association of the solute take place as folloes:A. I = 1 - aB. `i=1+a/n`C. `i=(1-a+(a)/(n))/1`D. I = 1
Answer» Correct Answer - c

Discussion

54.	`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 oxmosis there is `:` A. brown colour formation in side XB. brown colour formation in side YC. formation in both of the sides X and YD. no brown colour formation
Answer» Correct Answer - d

Discussion

55.	Each question contains STATEMENT-I(Assertion) and STATEMENT-2(Reason).the statement carefully and mark the correct answer accoring to the instrution given below: STATEMENT - 1 : Osmotic involves movement of solvent molecules from lower concentration to higher concentration. STATEMENT - 2 : Solutions having the same osmotic pressure are called isotonic solutions.A. If both the statements are TURE and STATEMENT-2 is the correct explanation STATEMENT-1B. If both the statements are TURE but STATEMENT-2 is NOT the correct explanation STATEMENT-1C. If STATEMENT-1 is TURE and STATEMENT-2 is FALSED. If STATEMENT-1 is FA,SE and STATEMENT-2 is TRUE
Answer» Correct Answer - B

Discussion

56.	Each question contains STATEMENT-I(Assertion) and STATEMENT-2(Reason).the statement carefully and mark the correct answer accoring to the instrution given below: STATEMENT - 1 : Osmotic pressure is a colligative property. STATEMENT - 2 : Osmotic pressure is developed in a column due to osmosis.A. If both the statements are TURE and STATEMENT-2 is the correct explanation STATEMENT-1B. If both the statements are TURE but STATEMENT-2 is NOT the correct explanation STATEMENT-1C. If STATEMENT-1 is TURE and STATEMENT-2 is FALSED. If STATEMENT-1 is FA,SE and STATEMENT-2 is TRUE
Answer» Correct Answer - B

Discussion

57.	Each question contains STATEMENT-I(Assertion) and STATEMENT-2(Reason).the statement carefully and mark the correct answer accoring to the instrution given below: STATEMENT - 1 : addition of ethylene glycol to water lowers the freezing point of water, therefore, used as antifreeze substance. STATEMENT - 2 : Ethylene glycol is soluble in water.A. If both the statements are TURE and STATEMENT-2 is the correct explanation STATEMENT-1B. If both the statements are TURE but STATEMENT-2 is NOT the correct explanation STATEMENT-1C. If STATEMENT-1 is TURE and STATEMENT-2 is FALSED. If STATEMENT-1 is FA,SE and STATEMENT-2 is TRUE
Answer» Correct Answer - B

Discussion

58.	Statement For iostomic solutions `C_(1) = C_(2)`. Explanation For isotomic solutions `pi_(1) = pi_(2)`.A. `S` is correct but `E` is wrong.B. `S` is wrong but `E` is correct.C. Both `S` and `E` are correct and `E` is correct explanation of `S`.D. Both `S` and `E` are correct but `E` is not correct explanation of `S`.
Answer» Correct Answer - B For isotomic solutions osmotic pressures are same. Concentration are same only when solute neither dissociates nor associates.

Discussion

59.	In the case of asmosis, solvent molecules move from :A. higher vapour pressure to lower vapour pressureB. higher concentration to lower concentrationC. lower vapour pressure to higher vopour pressureD. higher osmotic pressure to lower osmotic pressure
Answer» Correct Answer - a

Discussion

60.	A semipermeable membrane used in the measurement of osmotic pressure of a solution allows the passage ofA. solute molecular through itB. solvent molecules though itC. both solvent and solute moleculesD. either solvent or solute
Answer» Correct Answer - b

Discussion

61.	The empirical formula of a non-electrolyte is `CH_(2)O`. A solution containing 3 g `L^(-1)` of the compound exerts the same osmotic pressure as that of 0.05 M glucose solution. The molecules formula of the compound is :A. `CH_(2)O`B. `C_(2)H_(4)O_(2)`C. `C_(4)H_(8)O_(4)`D. `C_(3)H_(6)O_(3)`
Answer» Correct Answer - b

Discussion

62.	A solution containing 500 g of a protein per liter is isotonic with a solution containing 3.42 g sucrose per liter. The molecular mass of protein in 5 x `10^(x)`, hence x is.
Answer» Correct Answer - 4

Discussion

63.	An aqueous solution of glucose containing `12 g` in `100 g` of water was found to boil at `100.34^(@)C`. Calculate of `K_(b)` for water in `K mol^(-1)Kg`.
Answer» Given, `b.pt.` of water `= 100^(@)C` `b.pt.` of solution`=100.34^(@)C` Elevation in `b.pt., DeltaT= 0.34^(@)C`, `w=12 g, w= 100 g, m=180` `DeltaT=(1000K_(b)w)/(mW)` or `0.34=(1000xxK_(b)xx12)/(180xx100)` `k_(b)= 0.51 mol^(-1)kg`

Discussion

64.	Water will boil at `101.5^(@)C` at which of the following pressure:A. (a) `76 cm` of `Hg`B. (b) `76 mm` of `Hg`C. (c ) `gt 76 cm` of `Hg`D. (d) `lt 76 cm` of `Hg`
Answer» Correct Answer - C Water boils at higher temperature than its b.pt if atmosphere pressrue is more than `1 atm`.

Discussion

65.	The fish living in sea use the oxygen that is:A. (a) Part of `H_(2)O`B. (b) Dissolved in `H_(2)O`C. ( c) Part of saltD. (d) None of these
Answer» Correct Answer - B It is fact.

Discussion

66.	`15 g` of a solute in `100 g` of water makes a solution of freeze at `-1^(@)C.30g` of a solute in `100 g` of water will give a depression in `f.pt.` equal to:A. (a) `-2^(@)C`B. (b) `0.5^(@)C`C. (c ) `2^(@)C`D. (d) `1^(@)C`
Answer» Correct Answer - C `Delta T prop w` if other factors are constant, Thus `(Delta T)/(1) = (30)/(15)`, `:. Delta T = 2`

Discussion

67.	Why does the use of pressure cooker reduce cooking time ?A. (a) Heat is more evenly distributedB. (b) b.pt. of water inside the cooker is increasedC. ( c) The high pressure tenderises the foodD. (d) All of these
Answer» Correct Answer - B The temperature at which a liquid boils increases with increase in pressure.

Discussion

68.	The boiling point of `C_(6)H_(6) , CH_(3)OH , C_(6)H_(5)NH_(2) "and"C_(6)H_(5)NO_(2) "are" 80^(@)C, 65^(@)C, 184^(@)C "and"212^(@)C` respectively. Which will show highest vapour pressure at room temperature :A. `C_(6)H_(6)`B. `CH_(3)OH`C. `C_(6)H_(5)NH_(2)`D. `C_(6)H_(5)NO_(2)`
Answer» Correct Answer - b

Discussion

69.	When a solution containg non- volatile soute freezes, which equilibrium would exist?A. solid solvent`hArr` liquid soventB. solid solute` hArr` liquid solutionC. solid solute `hArr`liquit soventD. solid solvent `hArr`liquid solution
Answer» Correct Answer - d

Discussion

70.	Bromofrom has a nomal has freezing point of `7.734^(@)C` and `K_(f)=14.4^(@)C// m`.a solution of 2.60 g of an unknown substance in 100 g of freezes at `5.43^(@)C`. What is the molecules mass of the unkniwn substance ?A. 16.25B. 162.5C. 100D. none of these
Answer» Correct Answer - b

Discussion

71.	The temperature of a city was found to be `-9.3^(@)`C. A car used, whose rasiator was filled with 5 L of water . What minimum quantity of antifreezing agent ethylene glycol were added to water of raiator in order to use the car for teavelling? (`K_(f)`of water 1.861.86 k `mol^(-1))`A. 3200 gB. 1670 gC. 1550 gD. 2100 g
Answer» Correct Answer - c

Discussion

72.	Statement-1 : The observed molar mass of acetic acid in benzene is more than the nomal molar mass of acetic acid. Statement-2 : Molecules of acetic and dimerise in benzene due to hydrogen same.A. If both the statements are TURE and STATEMENT-2 is the correct explanation STATEMENT-1B. If both the statements are TURE but STATEMENT-2 is NOT the correct explanation STATEMENT-1C. If STATEMENT-1 is TURE and STATEMENT-2 is FALSED. If STATEMENT-1 is FA,SE and STATEMENT-2 is TRUE
Answer» Correct Answer - A

Discussion

73.	Dimer of ecetic acid in liquid benzene is in equilibrium with acetic acid monomer at certain trmpreture and pressure. If 25% of the dimar molecules are separated out thenA. freezing point of the solution reducesB. average moler mass of solute incerasesC. boiling point of solution increasesD. molarmass of solute decreases
Answer» Correct Answer - b

Discussion

74.	Consider following solutions: (I) I M glucose(aq) (II) 1 M sodium choride(aq) (III) 1 M acetic acid in benzene (IV) 1 M ammonium phosphate (aq)A. all are isotonic solutionsB. III is hypotonic of I, II, IVC. I, II, Ivare hypertonic of IIID. IV is hypertonic I, II, III
Answer» Correct Answer - b.c.d

Discussion

75.	The freezing point of solution containing `0.2 g` of acetic acid in `20.0 g` of benzene is lowered by `0.45^(@)C`. Calculate the degree of association of acetic acid in benzene. `(K_(f)=5.12 K^(@) mol^(-1) kg^(-1))`A. 0.527B. 0.8C. 0.945D. None of these
Answer» Correct Answer - c

Discussion

76.	The normal boiling point of toluene is `110.7^(@)C` and its boiling point elevation constant `3.32 " K kg mol"^(-1)`. The enthalpy of vaporization of toluene is nearly :A. `17.0 kjmol^(-1)`B. `34.0 kjmol^(-1)`C. `51.0 kjmol^(-1)`D. `68.0 kjmol^(-1)`
Answer» Correct Answer - b

Discussion

77.	Which solution will have least vapour pressure?A. (a) `0.01M BaCl_(2)`B. (b) `0.1 M` ureaC. ( c) `0.1M Na_(2)SO_(4)`D. (d) `0.1 M Na_(3)PO_(4)`
Answer» Correct Answer - D `-do-`. More is `Delta` vapour pressure, lesser is vapour pressure.

Discussion

78.	Which aqueous will have the highest boiling point?A. (a) `1%` glucose in waterB. (b) `1%` sucrose in waterC. ( c) `1% NaCl` in waterD. (d) `1% CaCl_(2)` in water
Answer» Correct Answer - C `-do-`. More is `Delta T_(b)` more is b.pt.

Discussion

79.	Which of the following aquous solutions should have the highest osmotic pressure?A. 0.011 M`AlCl_(3) "at" 50^(@)C`B. 0.03 m NaCl at `25^(@)C`C. 0.012 m `(NH_(4))_(2)SO_(4)` at `25^(@)`D. 0.03 m NaCl at `50^(@)C`
Answer» Correct Answer - d

Discussion

80.	Which one of the following aqueous solutions will exhibit highest boiling point?A. 0.015 M ureaB. 0.01 M `KNO_(3)`C. `0.10 M Na_(2) SO_(4)`D. 0.015 m glucose
Answer» Correct Answer - c

Discussion

81.	A 0.10 M solution of a mono protic acid (`d=1.01g//cm^(3)`) is 5% dissociated what is the freezing point of the solution the molar mass of the acid is 300 and `K_(f)(H_(2)O)=1.86C//m`A. `-0.189^(@)C`B. `-0.194^(@)C`C. `-0.199^(@)C`D. none of these
Answer» Correct Answer - c

Discussion

82.	How much ethyl alcohol must be added to `1.00 L` of water so that the solution will not freeze at `-4^(@)F` ?A. lt 20 gB. lt10.75 gC. lt 494.5 gD. gt494.5 g
Answer» Correct Answer - d

Discussion

83.	A solution containing 1.8 g of a compound (empirical formula `CH_(2)O`) in 40 g of water is observed to freeze at `-0.465^(@)`C. The molecules formulea of the compound is (`K_(f)` of water =1.86kg K`mol^(-1)`):A. `C_(2)H_(4)O_(2)`B. `C_(3)H_(6)`C. `C_(4)H_(8)O_(4)`D. `C_(6)H_(12)O_(6)`
Answer» Correct Answer - d

Discussion

84.	Freezing point of the following equilibrium, liquid solvent `hArr` solid solvent is :A. `(/_H -/_G)/(T/_S)`B. `(/_H)/(/_S)`C. `(/_G)/(/_S)`D. `(/_S)/(/_H)`
Answer» Correct Answer - b

Discussion

85.	When 36.0 g of a solute having the empirical formula `CH_(2)O` is dissovled in 1.20 kg of water, the solution freezes at `-0.93^(@)C`. What is the moleculer formula of the solute ? (`K_(f) = 1.86^(@)C kg mol^(-1)`)A. `C_(2)H_(4)O`B. `C_(2)H_(2)O_(2)`C. `C_(2)H_(4)O_(3)`D. `C_(2)H_(4)O_(2)`
Answer» Correct Answer - d

Discussion

86.	Freezing point of a solution is smaller than freezing point of a solvent. It is due to :A. `/_H` of solution and solvent is almost identical since intermolecular force between solvent molecules are involvedB. `/_S` solution (between solution and solid ) is lager than that of the `/_S`of solvent (between solvent and solid)C. `/_S` of then solution is smaller than that of the solventD. `/_H` of the solution is much higher than of solvent but `/_S` of solvent than that of the solvent
Answer» Correct Answer - b

Discussion

87.	In the depression of freezing point experiment, it is found that the:A. vapour pressure of pure solvent is more than that of solutionB. vapour pressure of pure solvent is less than that of solutionC. only solute molecules solidify at the freezing pointD. only solute molecules sodilify at the freezing point
Answer» Correct Answer - a,c

Discussion

88.	The cryoscpic constant value depends upon:A. the mole mass of the solute in the solutionB. the molar mass of the sovent in the solutionC. the enthalpy of fusion of the soventD. the freezing point of the solvent
Answer» Correct Answer - b,c,d

Discussion

89.	Each question contains STATEMENT-I(Assertion) and STATEMENT-2(Reason).the statement carefully and mark the correct answer accoring to the instrution given below: STATEMENT - 1 : Elevation in boiling point will be high if the molal elevation constant of the liquid is high. STATEMENT - 2 : Elevation in boiling point is a colligative property.A. If both the statements are TURE and STATEMENT-2 is the correct explanation STATEMENT-1B. If both the statements are TURE but STATEMENT-2 is NOT the correct explanation STATEMENT-1C. If STATEMENT-1 is TURE and STATEMENT-2 is FALSED. If STATEMENT-1 is FA,SE and STATEMENT-2 is TRUE
Answer» Correct Answer - B

Discussion

90.	Each question contains STATEMENT-I(Assertion) and STATEMENT-2(Reason).the statement carefully and mark the correct answer accoring to the instrution given below: STATEMENT - 1 : The boiling point of 0.1 M urea solution is less than that of 0.1 M KClsolution. STATEMENT - 2 : Elevation of boiling point is directly proportional to the number of moles of non-volatile solute particles present in the solution.A. If both the statements are TURE and STATEMENT-2 is the correct explanation STATEMENT-1B. If both the statements are TURE but STATEMENT-2 is NOT the correct explanation STATEMENT-1C. If STATEMENT-1 is TURE and STATEMENT-2 is FALSED. If STATEMENT-1 is FA,SE and STATEMENT-2 is TRUE
Answer» Correct Answer - A

Discussion

91.	Each question contains STATEMENT-I(Assertion) and STATEMENT-2(Reason).the statement carefully and mark the correct answer accoring to the instrution given below: STATEMENT - 1 : If red blood cells wrer removed from the body and placed in pure water, pressure inside the cell increases. STATEMENT - 2 : The concentration of the salt content in the cells increases.A. If both the statements are TURE and STATEMENT-2 is the correct explanation STATEMENT-1B. If both the statements are TURE but STATEMENT-2 is NOT the correct explanation STATEMENT-1C. If STATEMENT-1 is TURE and STATEMENT-2 is FALSED. If STATEMENT-1 is FA,SE and STATEMENT-2 is TRUE
Answer» Correct Answer - C

Discussion

92.	Each question contains STATEMENT-I(Assertion) and STATEMENT-2(Reason).the statement carefully and mark the correct answer accoring to the instrution given below: STATEMENT - 1 : Azeotrope is a binary mixture formed by ideal solutions. STATEMENT - 2 : Azeotrope boils with unchanged composition.A. If both the statements are TURE and STATEMENT-2 is the correct explanation STATEMENT-1B. If both the statements are TURE but STATEMENT-2 is NOT the correct explanation STATEMENT-1C. If STATEMENT-1 is TURE and STATEMENT-2 is FALSED. If STATEMENT-1 is FA,SE and STATEMENT-2 is TRUE
Answer» Correct Answer - D

Discussion

93.	Each question contains STATEMENT-I(Assertion) and STATEMENT-2(Reason).the statement carefully and mark the correct answer accoring to the instrution given below: STATEMENT - 1 : The molescular mass of acetic acid determined by depression in freezing point method in benzene and water was found to be differrent. STATEMENT - 2 : Water is polar and benzene is non-polar.A. If both the statements are TURE and STATEMENT-2 is the correct explanation STATEMENT-1B. If both the statements are TURE but STATEMENT-2 is NOT the correct explanation STATEMENT-1C. If STATEMENT-1 is TURE and STATEMENT-2 is FALSED. If STATEMENT-1 is FA,SE and STATEMENT-2 is TRUE
Answer» Correct Answer - A

Discussion

94.	Column -I and Column -II contain four entries each. Entries of column-I are to be matched with some entries of column-II. One or more than one entries of column-I may have the matching with the same entries of column-II.
Answer» Correct Answer - A `rarr`P; B`to`Q; C`to`S; D`to`R

Discussion

95.	Column -I and Column -II contain four entries each. Entries of column-I are to be matched with some entries of column-II. One or more than one entries of column-I may have the matching with the same entries of column-II.
Answer» Correct Answer - A `rarr`P; B`to`Q,R; C`to`R; D`to`Q

Discussion

96.	An industrial waste water I found to contain 8.2% `Na_(3)PO_(4)` and 12% `MgSO_(4)` by mass in solution. If % ionisation of `Na_(3)PO_(4) "and"MgSO_(4)`Are 50 and 60 respectively then its normal boiliung point is [`K_(b)(H_(2)O) = 0.50 K kg "mol"^(-1)`] :A. `102.3^(@)C`B. `103.35^(@)C`C. `101.785^(@)`D. none of these
Answer» Correct Answer - c

Discussion

97.	Which of the following solutions `(1 molal)` will have the maximum freezing point, assuming equal ionization in each case?A. `[Fe(H_(2)O)_(6)Cl]Cl_(3)`B. `[Fe(H_(2)O)_(5)Cl]Cl_(2).H_(2)O`C. `[Fe(H_(2)O)_(4)Cl_(2)]Cl.2H_(2)O`D. `[Fe(H_(2)O)_(3)Cl_(3)].3H_(2)O`
Answer» Correct Answer - d

Discussion

98.	Assuming complete ionisation, the solution having maximum freezing point will be:A. 1 M `CaF_(2)`B. 1.5 M`Al_(2)(SO_(4))_(3)`C. 2 M NaClD. 1 M `AgNO_(3)`
Answer» Correct Answer - d

Discussion

99.	Column -I and Column -II contain four entries each. Entries of column-I are to be matched with some entries of column-II. One or more than one entries of column-I may have the matching with the same entries of column-II.
Answer» Correct Answer - A `rarr`P, Q; B`to`P,R; C`to`P, S; D`to`P

Discussion

100.	Each question contains STATEMENT-I(Assertion) and STATEMENT-2(Reason).the statement carefully and mark the correct answer accoring to the instrution given below: STATEMENT - 1 : An increase in surface area increases the rate of evaporation. STATEMENT - 2 : Stronger the intermolecular attaction force, faster is the rate of evaporation at a given temperature.A. If both the statements are TURE and STATEMENT-2 is the correct explanation STATEMENT-1B. If both the statements are TURE but STATEMENT-2 is NOT the correct explanation STATEMENT-1C. If STATEMENT-1 is TURE and STATEMENT-2 is FALSED. If STATEMENT-1 is FA,SE and STATEMENT-2 is TRUE
Answer» Correct Answer - C

Discussion

Explore topic-wise InterviewSolutions in .

6.0 g of urea (molecules mass = 60)was dissolved in 9.9 moles of water. If the vspour presssure of pure water is `P^(@)`, the vapour pressure of solution is :A. 0.10 `P^(@)`B. 1.10 `P^(@)`C. 0.90 `P^(@)`D. 0.99 `P^(@)`

Which solution has the highert vapour presssure ?A. 0.02 M NaCl at `50^(@)`CB. 0.03 M sucrose at `15^(@)`CC. 0.005 m CaCl_(2) at `500 ^(@)C`D. 0.005 M` CaCl_(2) "at" 25^(@)C`

One mole of a soulte A is dissolved in a given volume of a solvent. The association of the solute take place as folloes:A. I = 1 - aB. `i=1+a/n`C. `i=(1-a+(a)/(n))/1`D. I = 1

In the case of asmosis, solvent molecules move from :A. higher vapour pressure to lower vapour pressureB. higher concentration to lower concentrationC. lower vapour pressure to higher vopour pressureD. higher osmotic pressure to lower osmotic pressure

A semipermeable membrane used in the measurement of osmotic pressure of a solution allows the passage ofA. solute molecular through itB. solvent molecules though itC. both solvent and solute moleculesD. either solvent or solute

The empirical formula of a non-electrolyte is `CH_(2)O`. A solution containing 3 g `L^(-1)` of the compound exerts the same osmotic pressure as that of 0.05 M glucose solution. The molecules formula of the compound is :A. `CH_(2)O`B. `C_(2)H_(4)O_(2)`C. `C_(4)H_(8)O_(4)`D. `C_(3)H_(6)O_(3)`

A solution containing 500 g of a protein per liter is isotonic with a solution containing 3.42 g sucrose per liter. The molecular mass of protein in 5 x `10^(x)`, hence x is.

An aqueous solution of glucose containing `12 g` in `100 g` of water was found to boil at `100.34^(@)C`. Calculate of `K_(b)` for water in `K mol^(-1)Kg`.

Water will boil at `101.5^(@)C` at which of the following pressure:A. (a) `76 cm` of `Hg`B. (b) `76 mm` of `Hg`C. (c ) `gt 76 cm` of `Hg`D. (d) `lt 76 cm` of `Hg`

The fish living in sea use the oxygen that is:A. (a) Part of `H_(2)O`B. (b) Dissolved in `H_(2)O`C. ( c) Part of saltD. (d) None of these

`15 g` of a solute in `100 g` of water makes a solution of freeze at `-1^(@)C.30g` of a solute in `100 g` of water will give a depression in `f.pt.` equal to:A. (a) `-2^(@)C`B. (b) `0.5^(@)C`C. (c ) `2^(@)C`D. (d) `1^(@)C`

Why does the use of pressure cooker reduce cooking time ?A. (a) Heat is more evenly distributedB. (b) b.pt. of water inside the cooker is increasedC. ( c) The high pressure tenderises the foodD. (d) All of these

The boiling point of `C_(6)H_(6) , CH_(3)OH , C_(6)H_(5)NH_(2) "and"C_(6)H_(5)NO_(2) "are" 80^(@)C, 65^(@)C, 184^(@)C "and"212^(@)C` respectively. Which will show highest vapour pressure at room temperature :A. `C_(6)H_(6)`B. `CH_(3)OH`C. `C_(6)H_(5)NH_(2)`D. `C_(6)H_(5)NO_(2)`

When a solution containg non- volatile soute freezes, which equilibrium would exist?A. solid solvent`hArr` liquid soventB. solid solute` hArr` liquid solutionC. solid solute `hArr`liquit soventD. solid solvent `hArr`liquid solution

Bromofrom has a nomal has freezing point of `7.734^(@)C` and `K_(f)=14.4^(@)C// m`.a solution of 2.60 g of an unknown substance in 100 g of freezes at `5.43^(@)C`. What is the molecules mass of the unkniwn substance ?A. 16.25B. 162.5C. 100D. none of these

Consider following solutions: (I) I M glucose(aq) (II) 1 M sodium choride(aq) (III) 1 M acetic acid in benzene (IV) 1 M ammonium phosphate (aq)A. all are isotonic solutionsB. III is hypotonic of I, II, IVC. I, II, Ivare hypertonic of IIID. IV is hypertonic I, II, III

The freezing point of solution containing `0.2 g` of acetic acid in `20.0 g` of benzene is lowered by `0.45^(@)C`. Calculate the degree of association of acetic acid in benzene. `(K_(f)=5.12 K^(@) mol^(-1) kg^(-1))`A. 0.527B. 0.8C. 0.945D. None of these

The normal boiling point of toluene is `110.7^(@)C` and its boiling point elevation constant `3.32 " K kg mol"^(-1)`. The enthalpy of vaporization of toluene is nearly :A. `17.0 kjmol^(-1)`B. `34.0 kjmol^(-1)`C. `51.0 kjmol^(-1)`D. `68.0 kjmol^(-1)`

Which solution will have least vapour pressure?A. (a) `0.01M BaCl_(2)`B. (b) `0.1 M` ureaC. ( c) `0.1M Na_(2)SO_(4)`D. (d) `0.1 M Na_(3)PO_(4)`

Which aqueous will have the highest boiling point?A. (a) `1%` glucose in waterB. (b) `1%` sucrose in waterC. ( c) `1% NaCl` in waterD. (d) `1% CaCl_(2)` in water

Which of the following aquous solutions should have the highest osmotic pressure?A. 0.011 M`AlCl_(3) "at" 50^(@)C`B. 0.03 m NaCl at `25^(@)C`C. 0.012 m `(NH_(4))_(2)SO_(4)` at `25^(@)`D. 0.03 m NaCl at `50^(@)C`

Which one of the following aqueous solutions will exhibit highest boiling point?A. 0.015 M ureaB. 0.01 M `KNO_(3)`C. `0.10 M Na_(2) SO_(4)`D. 0.015 m glucose

A 0.10 M solution of a mono protic acid (`d=1.01g//cm^(3)`) is 5% dissociated what is the freezing point of the solution the molar mass of the acid is 300 and `K_(f)(H_(2)O)=1.86C//m`A. `-0.189^(@)C`B. `-0.194^(@)C`C. `-0.199^(@)C`D. none of these

How much ethyl alcohol must be added to `1.00 L` of water so that the solution will not freeze at `-4^(@)F` ?A. lt 20 gB. lt10.75 gC. lt 494.5 gD. gt494.5 g

A solution containing 1.8 g of a compound (empirical formula `CH_(2)O`) in 40 g of water is observed to freeze at `-0.465^(@)`C. The molecules formulea of the compound is (`K_(f)` of water =1.86kg K`mol^(-1)`):A. `C_(2)H_(4)O_(2)`B. `C_(3)H_(6)`C. `C_(4)H_(8)O_(4)`D. `C_(6)H_(12)O_(6)`

Freezing point of the following equilibrium, liquid solvent `hArr` solid solvent is :A. `(/_H -/_G)/(T/_S)`B. `(/_H)/(/_S)`C. `(/_G)/(/_S)`D. `(/_S)/(/_H)`

When 36.0 g of a solute having the empirical formula `CH_(2)O` is dissovled in 1.20 kg of water, the solution freezes at `-0.93^(@)C`. What is the moleculer formula of the solute ? (`K_(f) = 1.86^(@)C kg mol^(-1)`)A. `C_(2)H_(4)O`B. `C_(2)H_(2)O_(2)`C. `C_(2)H_(4)O_(3)`D. `C_(2)H_(4)O_(2)`

The cryoscpic constant value depends upon:A. the mole mass of the solute in the solutionB. the molar mass of the sovent in the solutionC. the enthalpy of fusion of the soventD. the freezing point of the solvent

Column -I and Column -II contain four entries each. Entries of column-I are to be matched with some entries of column-II. One or more than one entries of column-I may have the matching with the same entries of column-II.

Column -I and Column -II contain four entries each. Entries of column-I are to be matched with some entries of column-II. One or more than one entries of column-I may have the matching with the same entries of column-II.

Which of the following solutions `(1 molal)` will have the maximum freezing point, assuming equal ionization in each case?A. `[Fe(H_(2)O)_(6)Cl]Cl_(3)`B. `[Fe(H_(2)O)_(5)Cl]Cl_(2).H_(2)O`C. `[Fe(H_(2)O)_(4)Cl_(2)]Cl.2H_(2)O`D. `[Fe(H_(2)O)_(3)Cl_(3)].3H_(2)O`

Assuming complete ionisation, the solution having maximum freezing point will be:A. 1 M `CaF_(2)`B. 1.5 M`Al_(2)(SO_(4))_(3)`C. 2 M NaClD. 1 M `AgNO_(3)`

Column -I and Column -II contain four entries each. Entries of column-I are to be matched with some entries of column-II. One or more than one entries of column-I may have the matching with the same entries of column-II.