Alpha Question Bank for Medical: Chemistry>Chapter 8 - Solutions>Exercise 4>Q 28

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A solution of acetone in ethanol

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Alpha Question Bank for Medical: Chemistry>Chapter 8 - Solutions>Exercise 4>Q 29

During osmosis, flow of water through a semipermeable membrane is:

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Alpha Question Bank for Medical: Chemistry>Chapter 8 - Solutions>Exercise 4>Q 30

0.5

molal aqueous solution of a weak acid

(HX)

is

20 %

ionised. If

K_{f}

for water is

1.86 {Kkgmol}^{- 1}

, the lowering in freezing point of the solution is:

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Alpha Question Bank for Medical: Chemistry>Chapter 8 - Solutions>Exercise 4>Q 31

Concentrated aqueous sulphuric acid is

98 % H_{2} {SO}_{4}

by mass and has a density of

1.80 g {ml}^{- 1}

. Volume of the acid required to make one litre of

0.1 M H_{2} {SO}_{4}

solution is:

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Alpha Question Bank for Medical: Chemistry>Chapter 8 - Solutions>Exercise 4>Q 32

The freezing point depression constant for water is

- 1.86 ° C m^{- 1}

. If

5.00 g {Na}_{2} {SO}_{4}

is dissolved in

45.0 g H_{2} O

, the freezing point is changed by

- 3.82 ° C

. Calculate the van't Hoff factor for

{Na}_{2} {SO}_{4}

.

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Alpha Question Bank for Medical: Chemistry>Chapter 8 - Solutions>Exercise 4>Q 33

The van't Hoff factor

i

for a compound which undergoes dissociation in one solvent and association in other solvent is respectively:

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Alpha Question Bank for Medical: Chemistry>Chapter 8 - Solutions>Exercise 4>Q 34

0.1

molal aqueous solution of a weak acid is

30 %

ionized, If

K_{f}

for water is

1.86 ° C / m

, the freezing point of the solution will be :

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Alpha Question Bank for Medical: Chemistry>Chapter 8 - Solutions>Exercise 4>Q 35

P_{A}

and

P_{B}

are the vapour pressure of pure liquid components,

A

and

B

, respectively of an ideal binary solution. If

X_{a}

represents the mole fraction of component

A

the total pressure of the solution will be.

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Alpha Question Bank for Medical: Chemistry>Chapter 8 - Solutions>Exercise 4>Q 36

Of the following

0.10 m

aqueous solutions, which one will exhibit the largest freezing point depression?