SOLUTIONs 12 Chemistry objective / multiple choice questions

UNIT-2- SOLUTION OBJECTIVE QUESTION BANK

1. What is the mole fraction of glycerine C3H5(OH)3 in solution containing 36 g of water and 46 g of glycerine ?
   (a) 0.46
   (b) 0.40
   (c) 0.20
   (d) 0.36
2. A solution of two liquids boils at a temperature more than the boiling point of either of them. Hence, the binary solution shows __. [Karnataka CET 2011]

(a) Negative deviation from Raoult’s law
(b) No deviation from Raoult’s law
(c) Positive deviation from Raoult’s law
(d) Positive or negative deviation from Raoult’s law depending upon the composition

3 . Out of molality (m), molarity (M), formality (F) and mole fraction (x), those which terms are independent of temperature are
(a) Molarity and molality
(b) Formality and and mole fraction
(c) molality and mole fraction
(d) Molarity and mole fraction

4. Which of the following condition is not satisfied by an ideal solution?
   (a) ΔHmixing = 0
   (b) ΔVmixing = 0
   (c) Raoult’s Law is obeyed
   (d) Azeotropic mixture is formed

5.Dissolving 120 g of urea (mol. wt. 60) in 1000 g of water gave a solution of density 1.15 g/mL. The molarity of the solution is [IIT JEE 2011]

(a) 1.78 M
(b) 2.00 M
(b) 2.05 M
(d) 2.22 M

6. The boiling point of an azeotropic mixture of water and ethanol is less than that of water and ethanol. The mixture shows
   (a) No deviation from Raoult’s Law.
   (b) Positive deviation from Raoult’s Law.
   (c) Negative deviation from Raoult’s Law.
   (d) That the solution is unsaturated.
7. Which has the lowest boiling point at 1 atm pressure?
   (a) 0.1 M KCl
   (b) 0.1 M Urea
   (c) 0.1 M MgCl2
   (d) 0.1 M A1Cl3

8.Equimolar solution in the same solvent have [AIEEE 2005]
(a) Same boiling point but different freezing point
(b) Same freezing point but different boiling point
(c) Same boiling point and same freezing point
(d) Different boiling point and different freezing point

9. Which has the highest freezing point at 1 atm pressure?
   (a) 0.1 M FeCl3
   (b) 0.1 M BaCl2
   (c) 0.1 M NaCl
   (d) 0.1 M Urea
10. Osmotic pressure of a solution is 0.0821 atm at a temperature of 300 K. The concentration in moles/litre will be
    (a) 330
    (b) 0.666
    (c) 0.3 × 10-2
    (d) 3.30

Answer / Solution

1.(c) 0.20
2.(a) Negative deviation from Raoult’s law
3.(c) molality and mole fraction
4.(d) Formation of an azeotropic mixture
5.(b) 2.05 M
6.(b) Positive deviation from Raoult’s Law.
7.(b) 0.1 M Urea
8.(c) Same boiling point and same freezing point
9.b) 0.1 M Urea
10.(c) 0.3 × 10-2