Solutions Test -18

Question 1
1 / -0

On dissolving sugar in water at room temperature solution feels cool to touch. Under which of the following cases dissolution of sugar will be most rapid?

A
Sugar crystals in cold water.

B
Sugar crystals in hot water.

C
Powdered sugar in cold water.

D
Powdered sugar in hot water.

Question 2
1 / -0

At equilibrium the rate of dissolution of a solid solute in a volatile liquid solvent is .........

A
Less than the rate of crystallisation

B
Greater than the rate of crystallisation

C
Equal to the rate of crystallisation

D
zero

Question 3
1 / -0

A beaker contains a solution of substance ‘A’. Precipitation of substance ‘A’ takes place when small amount of ‘A’ is added to the solution. The solution is

A
Saturated

B
Supersaturated

C
Unsaturated

D
Concentrated

Question 4
1 / -0

Maximum amount of a solid solute that can be dissolved in a specified amount of a given liquid solvent does not depend upon

A
Temperature

B
Nature of solute

C
Pressure

D
Nature of solvent

Question 5
1 / -0

Low concentration of oxygen in the blood and tissues of people living at high altitude is due to

A
Low temperature

B
Low atmospheric pressure

C
High atmospheric pressure

D
Both low temperature and high atmospheric pressure

Question 6
1 / -0

Considering the formation, breaking and strength of hydrogen bond, predict which of the following mixtures will show a positive deviation from Raoult’s law?

A
Methanol and acetone.

B
Chloroform and acetone.

C
Nitric acid and water

D
Phenol and aniline.

Question 7
1 / -0

Which of the following factor (s) affect the solubility of a gaseous solute in the fixed volume of liquid solvent?

(a) Nature of solute

(b) Temperature

(c) Pressure

(i) (a) and (c) At constant T

(ii) (a) and (b) At constant P

(iii) (b) and (c) only

(iv) (c) only

A
(i) and (ii)

B
(i) and (iii)

C
(iv) and (iii)

D
(ii) and (iv)

Question 8
1 / -0

Intermolecular forces between two benzene molecules are nearly of same strength as those between two toluene molecules. For a mixture of benzene and toluene, which of the following are not true?

(i) Δ_mix^H = zero

(ii) Δ_mix^V = zero

(iii) These will form minimum boiling azeotrope.

(iv) These will not form ideal solution.

A
(iii) and (iv)

B
(ii) and (iv)

C
(i) and (iv)

D
(i) and (ii)

Question 9
1 / -0

Relative lowering of vapour pressure is a colligative property because ...

(i) It depends on the concentration of a non-electrolyte solute in solution and does not depend on the nature of the solute molecules.

(ii) It depends on number of particles of electrolyte solute in solution and does not depend on the nature of the solute particles.

(iii) It depends on the concentration of a non-electrolyte solute in solution as well as on the nature of the solute molecules.

(iv) It depends on the concentration of an electrolyte or non-electrolyte solute in solution as well as on the nature of solute molecules.

A
(i) and (ii)

B
(iii) and (ii)

C
(iv) and (ii)

D
(iv) and (iii)

Question 10
1 / -0

For a very dilute solution of $${ H }_{ 3 }{ PO }_{ 3 }$$, Van’t Hoff factor is:

A
$$i=7$$

B
$$i=3$$

C
$$i=4$$

D
$$i=5$$

Question 11
1 / -0

$$12g$$ of urea is present in $$1$$ litre of solution and $$68.4 g$$ of sucrose is separately dissolved in $$1$$ litre of another sample of solution. The lowering of vapour pressure of first solution is :

A
Equal to second

B
Greater than second

C
Less than second

D
Double that of seconds

Question 12
1 / -0

The pressure at which liquid and vapour can coexist at equilibrium is called the :

A
limiting vapour pressure

B
real vapour pressure

C
normal vapour pressure

D
saturated vapour pressure

Question 13
1 / -0

In which of the following pairs of solutions will the values of the Van't Hoff factor be the same?

A
$$0.05$$ M $${ K }_{ 4 }\left[ Fe\left( CN \right) _{ 6 } \right] $$ and $$0.10$$ M $${ FeSO }_{ 4 }$$

B
$$0.20$$ M $$NaCl$$ and $$0.10$$ M $${ BaCl }_{ 2 }$$

C
$$0.05$$ M $${ FeSO }_{ 4 }\left( NH_{ 4 } \right) _{ 2 }{ SO }_{ 4 }.6{ H }_{ 2 }O$$ and $$0.02$$ M $$KCl.{ MgCl }_{ 2 }.{ 6H }_{ 2 }O$$

D
All have same value

Question 14
1 / -0

The van't hoff factor for a very dilute solution of $${ Fe }_{ 2 }\left( { SO }_{ 4 } \right) _{ 3 }$$ is:

A
$$9$$

B
$$5$$

C
$$24$$

D
$$16$$

Question 15
1 / -0

At a certain temperature, the vapour pressure of water is 90 mm. At the same temperature the vapour pressure of a solution containing a non-volatile solute is 81 mm. The relative lowering of vapour pressure is :

A
$$9$$

B
$$0.9$$

C
$$10$$

D
$$0.1$$

Question 16
1 / -0

Which one of the following represents the graph between log P on Y-axis and $$\cfrac { 1 }{ T } $$ on X-axis?

A

B

C

D

Question 17
1 / -0

Lowering of vapour pressures of equimolar solution of glucose, sodium chloride and barium nitrate are in the order:

A
Glucose > $$NaCl$$ > $$Ba(NO_{ 3 }) _{ 2 }$$

B
Glucose = $$NaCl$$ = $$Ba(NO_{ 3 }) _{ 2 }$$

C
$$Ba(NO_{ 3 }) _{ 2 }$$ > $$NaCl$$ > Glucose

D
$$NaCl$$ > $$Ba(NO_{ 3 }) _{ 2 }$$ > Glucose

Question 18
1 / -0

Van't Hoff factor for a dilute solution of sodium argento cyanide is :

A
$$2$$

B
$$0.25$$

C
$$0.50$$

D
$$3.0$$

Question 19
1 / -0

$$0.1 M K_{4} [Fe (CN)_{6}]$$ is 60% ionized. What will be its van't Hoff factor?

A
1.4

B
2.4

C
3.4

D
4.4

Submit Test

Solutions Test ...

Question 1

Sugar crystals in cold water.

Sugar crystals in hot water.

Powdered sugar in cold water.

Powdered sugar in hot water.

Question 2

Less than the rate of crystallisation

Greater than the rate of crystallisation

Equal to the rate of crystallisation

zero

Question 3

Saturated

Supersaturated

Unsaturated

Concentrated

Question 4

Temperature

Nature of solute

Pressure

Nature of solvent

Question 5

Low temperature

Low atmospheric pressure

High atmospheric pressure

Both low temperature and high atmospheric pressure

Question 6

Methanol and acetone.

Chloroform and acetone.

Nitric acid and water

Phenol and aniline.

Question 7

(i) and (ii)

(i) and (iii)

(iv) and (iii)

(ii) and (iv)

Question 8

(iii) and (iv)

(ii) and (iv)

(i) and (iv)

(i) and (ii)

Question 9

(i) and (ii)

(iii) and (ii)

(iv) and (ii)

(iv) and (iii)

Question 10

$$i=7$$

$$i=3$$

$$i=4$$

$$i=5$$

Question 11

Equal to second

Greater than second

Less than second

Double that of seconds

Question 12

limiting vapour pressure

real vapour pressure

normal vapour pressure

saturated vapour pressure

Question 13

$$0.05$$ M $${ K }_{ 4 }\left[ Fe\left( CN \right) _{ 6 } \right] $$ and $$0.10$$ M $${ FeSO }_{ 4 }$$

$$0.20$$ M $$NaCl$$ and $$0.10$$ M $${ BaCl }_{ 2 }$$

$$0.05$$ M $${ FeSO }_{ 4 }\left( NH_{ 4 } \right) _{ 2 }{ SO }_{ 4 }.6{ H }_{ 2 }O$$ and $$0.02$$ M $$KCl.{ MgCl }_{ 2 }.{ 6H }_{ 2 }O$$

All have same value

Question 14

$$9$$

$$5$$

$$24$$

$$16$$

Question 15

$$9$$

$$0.9$$

$$10$$

$$0.1$$

Question 16

Question 17

Glucose > $$NaCl$$ > $$Ba(NO_{ 3 }) _{ 2 }$$

Glucose = $$NaCl$$ = $$Ba(NO_{ 3 }) _{ 2 }$$