Van't Hoff Factor
Trending Questions
Q. The percentage of pyridine C5H5N that forms pyridinium ion (C5H5N+H) in a 0.10 M aqueous pyridine solution (Kb for C5H5N=1.7×10−9) is
- 0.77%
- 1.6%
- 0.0060%
- 0.013%
Q.
What is the molarity of ?
Q. Ionisation enthalpy order F >Cl>Cl {}^- >F{}^{}{}
Q. Van’t Hoff factor of Hg2Cl2 in its aqueous solution will be (Hg2Cl2 is 80% ionized is the solution)
- 1.6
- 2.6
- 3.6
- 4.6
Q. An oxide X2O3 is oxidised to XO4(-) by Cr2O7(2-) in acidic medium. The no of moles of X2O3 oxidised per mole of dichromate ion is
1. 2
2. 3/4
3. 3/2
4. None
Q. 99 1 mol N2 and 3 mol H2 are placed in a closed container at a pressure of 4 atm. The pressure falls to 3 atm at the same temperature when the following equillibrium is attained
Q. 20 g of a mixture containing MgCO and MgCl2is heated with dil. HCI, the amount of CO2 evolvedis 4 g, then the percentage composition of mixture
Q. 26 Expression relating mole fraction and molality is(A: solute and B ; solvent)cted35ce ofХв X1000gme is(2) mXAX1000(1-XA)MB(1) m(1-XA)MBmMB1-mMB(4) None of these(3) XB
Q.
The vapour pressure of pure water at 1000c is 760mm of Hg while that of dilute solution of urea is 740mm of Hg. Then mass of urea present in 7.60g water is
- 0.67g
6.7g
7.6g
0.76g
Q. 22.Assuming that100 cc. of 0.1M solution of H2SO4 is needed to nytralise 200cc Ba(OH)2 solution the normality of Ba(OH)2 solution is?also explain the units cc
Q. The sublimation temperature of a
substance is −83°C. It exist as cubic
packed structure with unit cell edge length
5.0 Å and density 8
3 g/cm3
, at −100°C.
What should be density of substance at
0°C and 1 atm? (NA = 6 × 1023)
(a) 50 g/cm3
(b) 2.23 g/cm3
(c) 2.23 g/l
(d) 1.86 g/l
Q. 10. A gauche interaction costs 3.8kj/mol, a hydrogen-hydrogen eclipsing interaction costs 4kj/mol, A hydrogen methyl eclipsing interaction costs 6kj/mol and a methyl- methyl eclipsing interaction costs 11kj/mol. What is the relative energy cost of the most stable comformers of 2, 3-dimethylbutane ?
Q. 45. Explain the formation of cyanide and isocyanide ion with the help of structural diagram?What is the difference between the 2?
Q. 47 x moles of potassium dichromate oxidizes 1 mole of ferrous oxalate in acidic medium.Here x is a)3 b)1.5 c)0.5 d)1.0
Q. 22 Ionisation constant of AOH and BOH base are kb1 and kb2. Their relationship is pkb1
View SolutionQ. Phenol associates in benzene to a certain extent for a dimer. A solution containing 20×10−3 kg of phenol in 1 kg of benzene has its freezing point decreased by 0.7 K
Calculate the fraction of the phenol that has dimerised
Given :
(Kf)Benzene=5.12 K kg mol−1
Calculate the fraction of the phenol that has dimerised
Given :
(Kf)Benzene=5.12 K kg mol−1
- 0.29
- 0.91
- 0.09
- 0.72
Q. 97. 100 ml of 0.1 M CaCl2 solution is mixed with25 ml of 0.3 N AgNO3 solution. Moles ofchloride ions remain unreacted is(1) 2.5(2) 5 x 10-3(3) 2.5 x 10-3(4) 1.25 x 10-
Q. 1.84g of a mixture of CaCO_{3 }and MgCO_3 is strongly heated till no further loss in mass takes place. The residue is found to weigh 0.96g. Calculate the percentage of each component in the mixture
Q.
A 5.25% solution of a substance is isotonic with a 1.5% solution of urea (molecular mass = 60g/mole) in the same solvent . If the densities of both the solutions are assumed to be equal to 1g/cc, molar mass of substance will be
- 210.0g/mole
- 90.0g/mole
- 115.0g/mole
- 105.0g/mole
Q. MX2 dissociates into M2+ and X− ions in an aqueous solution, having a degree of dissociation (α) of 0.5. The ratio of the observed depression in freezing point of the aqueous solution to the value of the depression in freezing point in the absence of ionic dissociation will be
Q. Find the vapour pressure of acetone in in a solution made by dissolving 1g of non volatile compound sulfanilamide in 10 g of acetone. The VP of pure acetone at that condition is 4?10^3mm of Hg(at mass of H = 1.008 g)
Q. van't Hoff factors of aqeuous solutions of x, y and z are 2.8, 1.8 and 3.5 respectively. Which of the following statements is correct?
- Boiling Point Order : x<y<z
- Freezing Point Order : z<x<y
- Osmotic Pressure Order: x=y=z
- Vapour Pressure Order : y<x<z
Q.
The Van't Hoff factor i for a 0.2 molal aqueous solution of urea is:
0.2
0.1
1.2
1.0
Q. 1.38g of N2O4 was placed in a 1L reaction vessel at 400k and allowed to attain equilibrium N2O4(g) ⇌ 2NO(g). The total pressure at equilibrium was found to be 9.15 bar. Calculate Kc, Kp, and partial pressure.
Q. Which of the following aqueous solutions have been arranged in the order of their decreasing freezing points?
- 0.05 M KNO3>0.04 M CaCl2>0.140 M Sugar>0.075 M CuSO4
- 0.04 M CaCl2>0.05 M KNO3>0.140 M Sugar>0.075 M CuSO4
- 0.075 M CuSO4>0.04 M CaCl2>0.05 M KNO3>0.140 M Sugar
- 0.140 M Sugar>0.075 M CaSO4>0.04 M CaCl2>0.05 M KNO3
Q. 20 g of solvent containing 0.25 g of solute (mol. mass 122 g/mol) freezes at 0.3∘C below the freezing point of pure solvent. If the solvent exists as dimer in the solvent, find its degree of association. (Kf)solvent=5.12 K kg−1 mol−1
- 0.86
- 0.14
- 0.99
- 0.01
Q. The freezing point depression of 0.001 m Kx[Fe(CN)6] is 7.44×10−3 K .
Determine the value of x.
Given:
(Kf)water=1.86 K kg mol−1
Assume complete ionisation of Kx[Fe(CN)6]
Determine the value of x.
Given:
(Kf)water=1.86 K kg mol−1
Assume complete ionisation of Kx[Fe(CN)6]
- 2
- 4
- 1
- 3
Q. What is mass fraction and what is sum of mass fraction of solute and solvent ?
Q. propyne is produced in the hydrolysis of carbides containing 1)C^{4-} ion 2)C_2^{2-} ion 3)C_3^{4-} ion 4)C_3^{2-} ion
Q.
What is the minimum volume of water required to dissolve 1g of calcium sulphate at 298 K? (For calcium sulphate, Ksp is 9.1 × 10–6).