Solutions Test -22

Question 1
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In isotonic solutions .......

(i) solute and solvent both are same.

(ii) osmotic pressure is same.

(iii) solute and solvent may or may not be same.

(iv) solute is always same solvent may be different.

A
(ii) and (iii)

B
(iii) and (i)

C
(i) and (iv)

D
(ii) and (i)

Question 2
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Colligative properties are observed when

(i) a nonvolatile solid is dissolved in a volatile liquid.

(ii) a nonvolatile liquid is dissolved in another volatile liquid.

(iii) a gas is dissolved in nonvolatile liquid.

(iv) a volatile liquid is dissolved in another volatile liquid.

A
(i) and (ii)

B
(ii) and (iii)

C
(iv) and (ii)

D
(i) and (iii)

Question 3

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Match the items given in Column I with the type of solutions given in Column II.

Column I	Column II
(i) Soda water	(a) A solution of gas in solid
(ii) Sugar solution	(b) A solution of gas in gas
(iii) German silver	(c) A solution of solid in liquid
(iv) Air	(d) A solution of solid in solid
(v) Hydrogen gas in palladium	(e) A solution of gas in liquid
	(f) A solution of liquid in solid

(i)- (e) (ii)- (c) (iii)- (d) (iv)- (b) (v)- (a)

(i)- (a) (ii)- (b) (iii)- (c) (iv)- (d) (v)- (e)

(i)- (e) (ii)- (a) (iii)- (b) (iv)- (c) (v)- (d)

(i)- (a) (ii)- (b) (iii)- (c) (iv)- (d) (v)- (e)

Question 4
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Assertion : When NaCl is added to water a depression in freezing point is observed.

Reason : The lowering of vapour pressure of a solution causes depression in the freezing point.

A
Assertion and reason both are correct statements and reason is correct explanation for assertion.

B
Assertion and reason both are correct statements but reason is not correct explanation for assertion.

C
Assertion is correct statement but reason is wrong statement.

D
Assertion and reason both are incorrect statements.

Question 5
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Assertion : When a solution is separated from the pure solvent by a semipermeable membrane, the solvent molecules pass through it from pure solvent side to the solution side.

Reason : Diffusion of solvent occurs from a region of high concentration solution to a region of low concentration solution.

A
Assertion and reason both are correct statements and reason is correct explanation for assertion.

B
Assertion and reason both are correct statements but reason is not correct explanation for assertion.

C
Assertion is correct statement but reason is wrong statement.

D
Assertion and reason both are incorrect statements.

Question 6
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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 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.

A
Solution (B) and (C) will follow Raoult’s law.

B
Solution (A) will follow Raoult’s law.

C
Solution (B) will show negative deviation from Raoult’s law.

D
Solution (C) will show positive deviation from Raoult’s law.

Question 7
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If two liquids A and B form minimum boiling azeotrope at some specific composition then ..................

A
A–B interactions are stronger than those between A–A or B–B.

B
vapour pressure of solution increases because more number of molecules of liquids A and B can escape from the solution.

C
vapour pressure of solution decreases because less number of molecules of only one of the liquids escape from the solution.

D
A–B interactions are weaker than those between A–A or B–B

Question 8
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4L of 0.02 M aqueous solution of NaCl was diluted by adding one litre of water. The molality of the resultant solution is

A
0.004

B
0.008

C
0.012

D
0.016

Question 9
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On the basis of information given below mark the correct option.

Information : On adding acetone to methanol some of the hydrogen bonds between methanol molecules break.

A
At specific composition methanol-acetone mixture will form minimum boiling azeotrope and will show positive deviation from Raoult’s law.

B
At specific composition methanol-acetone mixture forms maximum boiling azeotrope and will show positive deviation from Raoult’s law.

C
At specific composition methanol-acetone mixture will form minimum boiling azeotrope and will show negative deviation from Raoult’s law.

D
At specific composition methanol-acetone mixture will form maximum boiling azeotrope and will show negative deviation from Raoult’s law.

Question 10
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Choose the correct statement with respect to the vapour pressure of a liquid among the following.

A
Increases linearly with increasing temperature.

B
Increases non-linearly with increasing temperature.

C
Decreases linearly with increasing temperature.

D
Decreases non-linearly with increasing temperature.

Question 11
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Two $$5$$ molal solutions are prepared by dissolving a non-electrolyte non-volatile solute separately in the solvents X and Y. The molecular weights of the solvents are $$M_X$$ and $$M_Y$$, respectively where $$M_X=\displaystyle\frac{3}{4}M_Y$$. The relative lowering of vapour pressure of the solution in X is "m" times that of the solution in Y. Given that the number of moles of solute is very small in comparison to that of solvent, the value of "m" is?

A
$$\displaystyle\frac{3}{4}$$

B
$$\displaystyle\frac{1}{2}$$

C
$$\displaystyle\frac{1}{4}$$

D
$$\displaystyle\frac{4}{3}$$

Question 12
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For an ideal solution of two components A and B, which of the following is true?

A
$$\Delta H_{mixing} < 0(zero)$$

B
$$\Delta H_{mixing} > 0(zero)$$

C
A - B interaction is stronger than A - A and B - B interactions

D
A - A, B - B and A - B interactions are identical

Question 13
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Liquid $$M$$ and liquid $$N$$ form an ideal solution. The vapour pressures of pure liquids $$M$$ and $$N$$ are $$450$$ and $$700\ mm$$ $$Hg$$, respectively, at the same temperature. Then correct statement is:
($${x}_{M}=$$ Mole fraction of $$M$$ in solution;
$${x}_{N}=$$ Mole fraction of $$N$$ in solution;
$${y}_{M}=$$ Mole fraction of $$M$$ in vapour phase;
$${y}_{N}=$$ Mole fraction of $$N$$ in vapour phase)

A
$$({x}_{M}-{y}_{M})< ({x}_{N}-{y}_{N})$$

B
$$\cfrac{{x}_{M}}{{x}_{N}}< \cfrac{{y}_{M}}{{y}_{N}}$$

C
$$\cfrac{{x}_{M}}{{x}_{N}}> \cfrac{{y}_{M}}{{y}_{N}}$$

D
$$\cfrac{{x}_{M}}{{x}_{N}}= \cfrac{{y}_{M}}{{y}_{N}}$$

Question 14
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The observed osmotic pressure for a 0.10 M solution of $$Fe(NH_4)_2(SO_4)_2$$ at $$25^oC$$ is 10.8 atm. The expected and experimental (observed) values of Van't Hoff factor (i) will be respectively:

$$[R=0.082\ L\ {atm} K^{-1} mol^{-1}]$$

A
$$5$$ and $$4.42$$

B
$$4$$ and $$4.00$$

C
$$5$$ and $$3.42$$

D
$$3$$ and $$5.42$$

Question 15
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Two open beakers one containing a solvent and the other containing a mixture of that solvent with a non volatile solute are together sealed in a container. Over time:

A
The volume of the solution does not change and the volume of the solvent decreases

B
the volume of the solution deceases and the volume of the solvent increases

C
the volume of the solution and the solvent does not change

D
the volume of the solution increases and the volume of the solvent decreases

Question 16
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Consider the following liquid - vapour equilibrium Liquid $$\rightleftharpoons$$ Vapour. Which of the following relations is correct?

A
$$\dfrac {dlnG}{dT^{2}} = \dfrac {\Delta H_{v}}{RT^{2}}$$

B
$$\dfrac {dlnP}{dT} = \dfrac {-\Delta H_{v}}{RT}$$

C
$$\dfrac {dlnP}{dT^{2}} = \dfrac {-\Delta H_{v}}{T^{2}}$$

D
$$\dfrac {dlnP}{dT} = \dfrac {\Delta H_{v}}{RT^{2}}$$

Question 17
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Which one of the following electrolytes has the same value of van't Hoff's factor (i) as that of $$Al_2(SO_4)_3$$ (if all are 100% ionised)?

A
$$Al(NO_3)_3$$

B
$$K_4[Fe(CN)_6]$$

C
$$K_2SO_4$$

D
$$K_3[Fe(CN)_6]$$

Question 18
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For an ideal solution, the correct option is :

A
$$\Delta_{mix}S=0$$ at constant T and P

B
$$\Delta_{mix}V\neq 0$$ at correct T and P

C
$$\Delta_{mix}H=0$$ at constant T and P

D
$$\Delta_{mix} G=0$$ at constant T and P

Question 19
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Which one is not equal to zero for an ideal solution?

A
$$\Delta V_{mix}$$

B
$$\Delta P=P_{observed}-P_{Raoult}$$

C
$$\Delta H_{mix}$$

D
$$\Delta S_{mix}$$

Submit Test

Solutions Test ...

Question 1

(ii) and (iii)

(iii) and (i)

(i) and (iv)

(ii) and (i)

Question 2

(i) and (ii)

(ii) and (iii)

(iv) and (ii)

(i) and (iii)

Question 3

(i)- (e) (ii)- (c) (iii)- (d) (iv)- (b) (v)- (a)

(i)- (a) (ii)- (b) (iii)- (c) (iv)- (d) (v)- (e)

(i)- (e) (ii)- (a) (iii)- (b) (iv)- (c) (v)- (d)

(i)- (a) (ii)- (b) (iii)- (c) (iv)- (d) (v)- (e)

Question 4

Assertion and reason both are correct statements and reason is correct explanation for assertion.

Assertion and reason both are correct statements but reason is not correct explanation for assertion.

Assertion is correct statement but reason is wrong statement.

Assertion and reason both are incorrect statements.

Question 5

Assertion and reason both are correct statements and reason is correct explanation for assertion.

Assertion and reason both are correct statements but reason is not correct explanation for assertion.

Assertion is correct statement but reason is wrong statement.

Assertion and reason both are incorrect statements.

Question 6

Solution (B) and (C) will follow Raoult’s law.

Solution (A) will follow Raoult’s law.

Solution (B) will show negative deviation from Raoult’s law.

Solution (C) will show positive deviation from Raoult’s law.

Question 7

A–B interactions are stronger than those between A–A or B–B.

vapour pressure of solution increases because more number of molecules of liquids A and B can escape from the solution.

vapour pressure of solution decreases because less number of molecules of only one of the liquids escape from the solution.

A–B interactions are weaker than those between A–A or B–B

Question 8

0.004

0.008

0.012

0.016

Question 9

At specific composition methanol-acetone mixture will form minimum boiling azeotrope and will show positive deviation from Raoult’s law.

At specific composition methanol-acetone mixture forms maximum boiling azeotrope and will show positive deviation from Raoult’s law.

At specific composition methanol-acetone mixture will form minimum boiling azeotrope and will show negative deviation from Raoult’s law.

At specific composition methanol-acetone mixture will form maximum boiling azeotrope and will show negative deviation from Raoult’s law.

Question 10

Increases linearly with increasing temperature.

Increases non-linearly with increasing temperature.

Decreases linearly with increasing temperature.

Decreases non-linearly with increasing temperature.

Question 11

$$\displaystyle\frac{3}{4}$$

$$\displaystyle\frac{1}{2}$$

$$\displaystyle\frac{1}{4}$$

$$\displaystyle\frac{4}{3}$$

Question 12

$$\Delta H_{mixing} < 0(zero)$$

$$\Delta H_{mixing} > 0(zero)$$

A - B interaction is stronger than A - A and B - B interactions

A - A, B - B and A - B interactions are identical

Question 13

$$({x}_{M}-{y}_{M})< ({x}_{N}-{y}_{N})$$

$$\cfrac{{x}_{M}}{{x}_{N}}< \cfrac{{y}_{M}}{{y}_{N}}$$

$$\cfrac{{x}_{M}}{{x}_{N}}> \cfrac{{y}_{M}}{{y}_{N}}$$

$$\cfrac{{x}_{M}}{{x}_{N}}= \cfrac{{y}_{M}}{{y}_{N}}$$

Question 14

$$5$$ and $$4.42$$

$$4$$ and $$4.00$$

$$5$$ and $$3.42$$

$$3$$ and $$5.42$$

Question 15

The volume of the solution does not change and the volume of the solvent decreases

the volume of the solution deceases and the volume of the solvent increases

the volume of the solution and the solvent does not change

the volume of the solution increases and the volume of the solvent decreases

Question 16

$$\dfrac {dlnG}{dT^{2}} = \dfrac {\Delta H_{v}}{RT^{2}}$$

$$\dfrac {dlnP}{dT} = \dfrac {-\Delta H_{v}}{RT}$$

$$\dfrac {dlnP}{dT^{2}} = \dfrac {-\Delta H_{v}}{T^{2}}$$