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.

Solution ( A ) will follow Raoult's law.

Solution ( B ) and ( C ) 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.

Write two differences between ideal and non-ideal solutions.

Ideal solutions : An ideal solution is the solution which obeys Raoult's law perfectly over entire range of concentration and temperature and during its formation there is no change in its enthalpy and volume. Such solutions are formed by mixing the two components which are identical in molecular size, in structure and have almost identical intermolecualr forces. Examples of ideal solution:- Chlorobenzene and bromobenzene; Benzene and toluene; Ethyl bromide and ethyl iodide. Non-ideal solutions : Those solutions which do not obey Rault's law are called non-ideal solutions. Non ideal solutions are formed when the components differ much in their structures and polarities. Non ideal solutions show either positive or negative deviations from Rault's law. Examples of non-ideal solution :- Ethanol and cyclohexane; Acetone and benzene; Water and methanol.

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The value of Henry's constant $K_{H}$ is

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Important Questions on Solutions

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NEW SYSTEMATIC MODERN CHEMISTRY>Chapter 2 - Solutions>REVIEW EXERCISES>Q 39

Consider the Fig. and make the correct option.

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NEW SYSTEMATIC MODERN CHEMISTRY>Chapter 2 - Solutions>REVIEW EXERCISES>Q 40

We have three aqueous solutions of

NaCl

labelled as

A^{'}, {}^{'}B

and

' C

with concentrations

0.1 M, 0.01 M

and

0.001 M

respectively. The value of van't Hoff factor for these solutions will be in the order

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NEW SYSTEMATIC MODERN CHEMISTRY>Chapter 2 - Solutions>REVIEW EXERCISES>Q 41

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

B - B

type intermolecular interactions are stronger than

A - B

type interactions.
(C) In chloroform and acetone mixture,

A - A

B - B

type intermolecular interactions are weaker than

A - B

type interactions.

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NEW SYSTEMATIC MODERN CHEMISTRY>Chapter 2 - Solutions>REVIEW EXERCISES>Q 42

Two beakers of capacity $500 mL$ were taken. One of these beakers, labelled as $" A ",$ was filled with $400 mL$ water whereas the beaker labelled $" B "$ was filled with $400 mL$ of $2 M$ solution of $NaCl .$ At the same temperature, both the beakers were placed in closed containers of same material and same capacity as shown in Fig. At a given temperature, which of the following statements is correct about the vapour pressure of pure water and that of $NaCl$ solution?

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NEW SYSTEMATIC MODERN CHEMISTRY>Chapter 2 - Solutions>REVIEW EXERCISES>Q 43

If two liquids $A$ and $B$ form minimum boiling azeotrope at some specific composition then

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NEW SYSTEMATIC MODERN CHEMISTRY>Chapter 2 - Solutions>REVIEW EXERCISES>Q 44

4 L

0.02 M

aqueous solution of

NaCl

was diluted by adding one litre of water. The molarity of the resultant solution is

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NEW SYSTEMATIC MODERN CHEMISTRY>Chapter 2 - Solutions>REVIEW EXERCISES>Q 45

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.

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NEW SYSTEMATIC MODERN CHEMISTRY>Chapter 2 - Solutions>REVIEW EXERCISES>Q 46

K_{H}

value for

Ar (g), {CO}_{2} (g), HCHO (g)

and

{CH}_{4} (g)

are

40.39,

1.67, 1.83 \times 10^{- 5}

and

0.413

respectively.
Arrange these gases in the order of their increasing solubility.

The value of Henry's constant KH is

Important Questions on Solutions

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The value of Henry's constant $K_{H}$ is