Which one of the following salts will have the same value of van't Hoff factor (i) as that of K4[Fe(CN)6]?
Al2(SO4)3
NaCl
Al(NO3)3
Na2SO4
According to Raoult's law, relative lowering of vapour pressure of a solution is equal to
moles of solute
moles of solvent
mole fraction of solute
mole fraction of solvent
A 5% solution of cane sugar (mol wt = 342) is isotonic with 1% solution of a substance X. The molecular weight of X is
34.2
171.2
68.4
136.8
How many gram of a dibasic acid (mol wt 200) should be present in 100 ml. of the aqueous solution to give 0.1 N?
1 g
2g
10g
20g
Which of the following aqueous solutions has minimum freezing point?
0.01 m NaCl
0.005 m MgI2
0.005 m C2H5OH
0.005 m MgSO4
In cold countries, ethylene glycol is added to water in the radiators of cars during winter. This results in
Lowering the freezing point
Reducing the specific heat
Reducing the viscosity
Making water a better conductor of electricity
The volume strength of 1.5 N H2O2 solution is
4.8
5.2
8.4
8.8
The vapour pressure, at a given temperature, of an ideal solution containing 0.2 mole of a non volatile solute and 0.8 mole of solvent is 60 mm of Hg. The vapour pressure of the pure solvent at the same temperature is.
150 mm of Hg
60 mm of Hg
75 mm of Hg
120 mm of Hg
A 500g of tooth paste sample has 0.4g fluoride concentration. The concentration of fluoride in ppm is
800
400
600
250
The van't Hoff factor for an aqueous solution of Al2(SO4)3 is
3
5
9
4