Alpha Question Bank for Medical: Chemistry>Chapter 8 - Solutions>Exercise 4>Q 65

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The freezing point of a diluted milk sample is found to $- {0.2}^{o} C,$ while it should have been $- {0.5}^{o} C,$ for pure milk. How much water has been added to pure milk to make the diluted sample?

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Alpha Question Bank for Medical: Chemistry>Chapter 8 - Solutions>Exercise 4>Q 66

Molecules of benzoic acid

(C_{6} H_{5} COOH)

dimerise in benzene.

‘ w ’ g

of the acid dissolved in

30 g

of benzene shows a depression in freezing point equal to

2 K

. If the percentage association of the acid to form a dimer in the solution is

80

, then

" w "

is: (Given that

K_{f} = 5 kg {mol}^{- 1}

, Molar mass of benzoic acid

= 122 g {mol}^{- 1}

)

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Alpha Question Bank for Medical: Chemistry>Chapter 8 - Solutions>Exercise 4>Q 67

The freezing point of a

4 %

aqueous solution of

X

is equal to the freezing point of a

12 %

aqueous solution of

Y

. If the molecular weight of

X

is

A

, then the molecular weight of

Y

will be

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Alpha Question Bank for Medical: Chemistry>Chapter 8 - Solutions>Exercise 4>Q 68

Which of the following salts is the most basic in aqueous solution?

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Alpha Question Bank for Medical: Chemistry>Chapter 8 - Solutions>Exercise 5>Q 1

The boiling points of two miscible liquids, which do not form an azeotropic mixture, are close to each other. Their separation is best carried out by:

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Alpha Question Bank for Medical: Chemistry>Chapter 8 - Solutions>Exercise 5>Q 3

What is the molarity of

H_{2} {SO}_{4}

solution that has a density

1.84 g / cc

at

35 ° C

and contains

98 %

by weight?

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Alpha Question Bank for Medical: Chemistry>Chapter 8 - Solutions>Exercise 5>Q 4

A piece of aluminium weighing

2.7 g

is heated with

75.0 ml

of

H_{2} {SO}_{4}

(Specific gravity of

1.2

containing

25 % H_{2} {SO}_{4}

by mass). After the metal is carefully dissolved, the solution is diluted to

400 ml

. What is the molarity of the free

H_{2} {SO}_{4}

in the resulting solution?

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Alpha Question Bank for Medical: Chemistry>Chapter 8 - Solutions>Exercise 5>Q 5

22.7 mL

of

(N / 10) {Na}_{2} {CO}_{3}

solution neutralizes

10.2 mL

of a dilute

H_{2} {SO}_{4}

solution. The volume of water that must be added to

400 mL

of this

H_{2} {SO}_{4}

solution in order to make it exactly

N / 10

is

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Alpha Question Bank for Medical: Chemistry>Chapter 8 - Solutions>Exercise 5>Q 6

Solutions having the same osmotic pressure are called