Solutions Test

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Solutions Test - 20

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Weekly Quiz Competition

Question 1
4 / -1

If 0.1 M solutions of each electrolyte are taken and if all electrolytes are completely dissociated, then whose boiling point will be highest ?

A
Glucose

B
KCl

C
BaCl₂

D
K₄ [Fe(CN)₆]
Question 2
4 / -1

The vapour pressure of water at 20°C is 17.5 mm Hg. If 18 g of glucose (C₆H₁₂O₆ ) is added to 178.2 g of water at 20°C, the vapour pressure of the resulting solution will be

A
17.675 mmHg

B
15.750 mmHg

C
16.500 mmHg

D
17.325 mmHg
Question 3
4 / -1

When 25 g of a non-volatile solute is dissolved in 100 g of water, the vapour pressure is lowered by 2.25 × 10^-1 mm. If the vapour pressure of water at 20°C is 17.5 mm, what is the molecular weight of the solute ?

A
206

B
302

C
350

D
276

Solution
Question 4
4 / -1

Solutions A, B, C and D are respectively 0.1 M glucose, 0.05 M NaCl, 0.05 M BaCl₂ and 0.1 M AlCl₃ . Which one of the following pairs is isotonic ?

A
A and B

B
B and C

C
A and D

D
A and C
Question 5
4 / -1

Which of the following solutions will have highest boiling point ?

A
0.1 M FeCl₃

B
0.1 M BaCl₂

C
0.1 M NaCl

D
0.1 M urea (NH₂ CONH₂ )

Solution
Question 6
4 / -1

Which of the following can be measured by the Ostwald-Walker dynamic method ?

A
Relative lowering of vapour pressure

B
Lowering of vapour pressure

C
Vapour pressure of the solvent

D
All of the above
Question 7
4 / -1

The freezing point of water is depressed by 0.37°C in a 0.01 mol NaCl solution. The freezing point of 0.02 molal solution of urea is depressed by

A
0.37°C

B
0.74°C

C
0.185°C

D
0°C
Question 8
4 / -1

On adding 1 g arsenic to 80 g benzene, the freezing point of benzene is lowered by 0.19°C. The formula of arsenic is
( K_f = 5.08 K kg mol^-1 )

A
As

B
As₂

C
As₃

D
As₄

Solution
Question 9
4 / -1

The osmotic pressure (at 27°C) of an aqueous solution (200 mL) containing 6 g of a protein is 2 × 10^-3 atm. If R = 0.080 L atm mol^-1 K ^-1, the molecular weight of protein is

A
7.2 × 10⁵

B
3.6 × 10⁵

C
1.8 × 10⁵

D
1.0 × 10⁵
Question 10
4 / -1

A solution containing 4 g of polyvinyl chloride polymer in one litre of dioxane was found to have an osmotic pressure of 4.1×10^-4atm at 27°C. The approximate molecular weight of the polymer is

A
1.5 × 10³

B
2.4 × 10⁵

C
1.0 × 10⁴

D
2 × 10¹²

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Solutions Test - 20

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Solutions Test - 20

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Question 1

Glucose

KCl

BaCl2

K4 [Fe(CN)6]

Question 2

17.675 mmHg

15.750 mmHg

16.500 mmHg

17.325 mmHg

Question 3

206

302

350

276

Solution

Question 4

A and B

B and C

A and D

A and C

Question 5

0.1 M FeCl3

0.1 M BaCl2

0.1 M NaCl

0.1 M urea (NH2 CONH2 )

Solution

Question 6

Relative lowering of vapour pressure

Lowering of vapour pressure

Vapour pressure of the solvent

All of the above

Question 7

0.37°C

0.74°C

0.185°C

0°C

Question 8

As

As2

As3

As4

Solution

Question 9

7.2 × 105

3.6 × 105

1.8 × 105

1.0 × 105

Question 10

1.5 × 103

2.4 × 105

1.0 × 104

2 × 1012

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BaCl₂

K₄ [Fe(CN)₆]

0.1 M FeCl₃

0.1 M BaCl₂

0.1 M urea (NH₂ CONH₂ )

As₂

As₃

As₄

7.2 × 10⁵

3.6 × 10⁵

1.8 × 10⁵

1.0 × 10⁵

1.5 × 10³

2.4 × 10⁵

1.0 × 10⁴

2 × 10¹²