WorksheetsSolutions (12th)
Total questions: 9
Worksheet time: 5mins
Mole fraction of glycerine C3H5(OH)3 in solution containing 36 g of water and 46 g of glycerine is
0.46
0,40
0,20
0.36
Out of molality (m), molarity (M), formality (F) and mole fraction (x), those which are independent of temperature are
M,m
F,x
m,x
M,x
Which of the following condition is not satisfied by an ideal solution?
ΔHmixing = 0
ΔVmixing = 0
Raoult’s Law is obeyed
Formation of an azeotropic mixture
The boiling point of an azeotropic mixture of water and ethanol is less than that of water and ethanol. The mixture shows
no deviation from Raoult’s Law
positive deviation from Raoult’s Law
negative deviation from Raoult’s Law
that the solution is unsaturated
Which has the lowest boiling point at 1 atm pressure?
0.1 M KCl
0.1 M Urea
0.1 M CaCl2
0.1 M A1Cl3
Osmotic pressure of a solution is 0.0821 atm at a temperature of 300 K. The concentration in moles/litre will be
0.33
0.666
0.3 × 10-2
3
People add sodium chloride to water while boiling eggs. This is to
decrease the boiling point.
increase the boiling point.
prevent the breaking of eggs
make eggs tasty.
The molal elevation constant depends upon
nature of solute.
nature of the solvent.
vapour pressure of the solution
enthalpy change.
The van’t Hoff factor (i) accounts for
degree of solubilisation of solute.
the extent of dissociation of solute
the extent of dissolution of solute.
the degree of decomposition of solution
