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Practice each question, then open the answer or worked solution.
An unripe mango, placed in a concentrated salt solution to prepare pickle,
shrivels because _____________.
(i) it gains water due to osmosis.
(ii) it loses water due to reverse osmosis.
(iii) it gains water due to reverse osmosis.
(iv) it loses water due to osmosis.
Option (iv) is the answer.
At a given temperature, osmotic pressure of a concentrated solution of a
substance _____________.
(i) is higher than that at a dilute solution.
(ii) is lower than that of a dilute solution.
(iii) is same as that of a dilute solution.
(iv) cannot be compared with an osmotic pressure of a dilute solution.
Option (i) is the answer.
Which of the following statements is false?
solvents will have the same depression in the freezing point.
( where C is the molarity of the solution).
barium chloride, potassium chloride, acetic acid and sucrose is
BaCl2> KCl > CH3COOH > sucrose.
component of a solution is directly proportional to its mole fraction in
the solution.
Option (i) is the answer.
The values of Van’t Hoff factors for KCl, NaCl and K2SO4
, respectively, are
_____________.
(i) 2, 2 and 2
(ii) 2, 2 and 3
(iii) 1, 1 and 2
(iv) 1, 1 and 1
Option (ii) is the answer.
Which of the following statements is false?
membrane from a region of lower concentration of solute to a region of
higher concentration.
Option (ii) is the answer.
Value of Henry’s constant KH
____________.
(i) increases with an increase in temperature.
(ii) decreases with an increase in temperature.
(iii) remains constant.
(iv) first increases then decrease.
Option (i) is the answer.
The value of Henry’s constant KH
is _____________.
(i) greater for gases with higher solubility.
(ii) greater for gases with lower solubility.
(iii) constant for all gases.
(iv) not related to the solubility of gases.
Option (ii) is the answer.
Consider Fig. 2.1 and mark the correct option.
(A).
Option (ii) is the answer.
We have three aqueous solutions of NaCl labelled as ‘A’, ‘B’ and ‘C’ with
concentrations 0.1M, 0.01M and 0.001M, respectively. The value of van’t Hoff
factor for these solutions will be in the order______.
(i) iA< iB< iC
(ii) iA> iB> iC
(iii) iA= iB= iC
(iv) iA<iB> iC
Option (iii) is the answer.
On the basis of information given below mark the correct option.
Information:
(A) In bromoethane and chloroethane mixture intermolecular interactions
of A–A and B–B type are nearly the same as A–B type interactions.
(B) In ethanol and acetone mixture A–A or B–B type intermolecular
interactions are stronger than A–B type interactions.
(C) In chloroform and acetone mixture A–A or B–B type intermolecular
interactions are weaker than A–B type interactions.
Option (ii) is the answer.