ICSE Chemistry>Chapter 2 - Solutions>QUESTIONS FROM ISC EXAMINATION PAPERS>Q 8

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IMPORTANT

Earn 100

Out of the following solutions, the one having the highest boiling point will be

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Important Questions on Solutions

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IMPORTANT

ICSE Chemistry>Chapter 2 - Solutions>QUESTIONS FROM ISC EXAMINATION PAPERS>Q 8

0.1 M

urea solution shows less depression in freezing point than

0.1 M

{MgCl}_{2}

solution. Explain.

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ICSE Chemistry>Chapter 2 - Solutions>QUESTIONS FROM ISC EXAMINATION PAPERS>Q 9

46 gms

of ethyl alcohol is dissolved in

18 g

of water. Calculate the mole fraction of ethyl alcohol. (at. wt. of

C = 12, O = 16, H = 1

).

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ICSE Chemistry>Chapter 2 - Solutions>QUESTIONS FROM ISC EXAMINATION PAPERS>Q 9

The osmotic pressure of

0.01

molar solution of an electrolyte is found to be

0.65 atm .

at

27 ° C

. Calculate the van’t Hoff factor. What conclusion can you draw about the molecular state of the solute in the solution?

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ICSE Chemistry>Chapter 2 - Solutions>QUESTIONS FROM ISC EXAMINATION PAPERS>Q 10

A solution X is prepared by dissolving three moles of glucose in one litre of water and a solution Y is prepared by dissolving

1.5

moles of sodium chloride in one litre of water. Will the osmotic pressure of X be higher, lower or equal to that of Y? Give a reason for your answer.

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ICSE Chemistry>Chapter 2 - Solutions>QUESTIONS FROM ISC EXAMINATION PAPERS>Q 11

A solution of urea in water has a boiling point of

100.18 ° C

. Calculate the freezing point of the solution. (K_f for water is

1.86 K \cdot Kg \cdot {mol}^{- 1}

and K_b for water is

0.512 K \cdot Kg \cdot {mol}^{- 1}

).

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ICSE Chemistry>Chapter 2 - Solutions>QUESTIONS FROM ISC EXAMINATION PAPERS>Q 11

A solution of lactose, containing

8.45 g

of lactose in

100 g

of water has a vapour pressure of

4.559 mm

of

Hg

at

0 ° C

. If the vapour pressure of pure water is

4.579 mm

of

Hg

, calculate the molecular weight of lactose.

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ICSE Chemistry>Chapter 2 - Solutions>QUESTIONS FROM ISC EXAMINATION PAPERS>Q 12

Among equimolal solutions of

{MgCl}_{2}

,

NaCl

,

{FeCl}_{3}

and

C_{12} H_{22} O_{11}

, which will show minimum osmotic pressure? Why?

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IMPORTANT

ICSE Chemistry>Chapter 2 - Solutions>QUESTIONS FROM ISC EXAMINATION PAPERS>Q 13

A certain aqueous solution boils at

100.303 ° C

. What is its freezing point? K_b for water

= 0.5 K \cdot Kg \cdot {mol}^{- 1}

and K_f

= 1.87 K \cdot Kg \cdot {mol}^{- 1}

?