Consider separate solution of 0 . 500 M C 2 H 5 OH ( aq ) , 0 . 100 M Mg 3 ( PO 4 ) 2 ( aq ) , 0 . 250 M KBr ( aq ) and 0 . 125 M Na 3 PO 4 ( aq ) at 25 ° C . Which statement is true about these solution, assuming all salts to be strong electrolytes ?

They all have the same osmotic pressure.

0 . 100 M Mg 3 ( PO 4 ) 2 ( aq ) has the highest osmotic pressure.

0 . 125 M Na 3 PO 4 ( aq ) has the highest osmotic pressure

0 . 500 M C 2 H 5 OH ( aq ) has the highest osmotic pressure.

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A mixture of ethyl alcohol and propyl alcohol has a vapour pressure of $290 mm$ at $300 K$ . The vapour pressure of propyl alcohol is $200 mm$ . If the mole fraction of ethyl alcohol is $0.6$ , its vapour pressure (in $mm$ ) at the same temperature will be

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Alpha Question Bank for Medical: Chemistry>Chapter 8 - Solutions>Exercise 4>Q 49

5.25 %

solution of a substance is isotonic with a

1.5 %

solution of urea (molar mass

= 60 g {mol}^{-}

) in the same solvent. If the densities of both the solutions are assumed to be equal to

1.0 g {cm}^{- 3}

, molar mass of the substance will be

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Alpha Question Bank for Medical: Chemistry>Chapter 8 - Solutions>Exercise 4>Q 50

The vapour pressure of pure water at

20 ° C is 17.5 mm Hg

. If

18 g

of glucose

(C_{6} H_{12} O_{6})

is added to

178.2 g

of water at

20 ° C

, the vapour pressure of resulting solution will be

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Alpha Question Bank for Medical: Chemistry>Chapter 8 - Solutions>Exercise 4>Q 51

80 ° C

, the vapour pressure of a pure liquid

' A'

520 mm Hg

and that of a pure liquid

' B'

1000 mm Hg

. If a mixture solution of

' A'

and

' B'

boils at

80 ° C

, at

1 atm

pressure, the amount of

' A'

in the mixture is

(1 atm = 760 mm Hg)

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Alpha Question Bank for Medical: Chemistry>Chapter 8 - Solutions>Exercise 4>Q 52

A binary liquid solution is prepared by mixing

n -

heptane and ethanol. Which one of the following statements is correct regarding the behaviour of the solution?

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Alpha Question Bank for Medical: Chemistry>Chapter 8 - Solutions>Exercise 4>Q 53

If sodium sulphate is considered to be completely dissociated into cations and anions in aqueous solution, the change in freezing point of water

∆ T_{f}

, when

0.01 mole

of sodium sulphate is dissolved in

1 Kg

of water is (

K_{f} = 1.86 K kg {mol}^{-}

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Alpha Question Bank for Medical: Chemistry>Chapter 8 - Solutions>Exercise 4>Q 54

K_{f}

for water is

1.86 K kg {mol}^{- 1}

. If your automobile radiator holds

1.0 kg

of water, how many grams of ethylene glycol

(C_{2} H_{6} O_{2})

must you add to get the freezing point of the solution lowered to

- 2.8 ° C ?

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Alpha Question Bank for Medical: Chemistry>Chapter 8 - Solutions>Exercise 4>Q 55

Consider separate solution of

0.500 M C_{2} H_{5} OH (aq), 0.100 M {Mg}_{3} ({PO}_{4})_{2} (aq), 0.250 M KBr (aq)

and

0.125 M {Na}_{3} {PO}_{4} (aq)

25 ° C

. Which statement is true about these solution, assuming all salts to be strong electrolytes ?

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Alpha Question Bank for Medical: Chemistry>Chapter 8 - Solutions>Exercise 4>Q 56

The vapour pressure of acetone at

20 ° C

185 torr

. When

1.2 g

of a non-volatile substance was dissolved in

100 g

of acetone at

20 ° C

, its vapour pressure was

183 torr

. The molar mass

(g {mol}^{- 1})

of the substance is

A mixture of ethyl alcohol and propyl alcohol has a vapour pressure of 290 mm at 300 K. The vapour pressure of propyl alcohol is 200 mm. If the mole fraction of ethyl alcohol is 0.6, its vapour pressure (in mm) at the same temperature will be

Important Questions on Solutions

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A mixture of ethyl alcohol and propyl alcohol has a vapour pressure of $290 mm$ at $300 K$ . The vapour pressure of propyl alcohol is $200 mm$ . If the mole fraction of ethyl alcohol is $0.6$ , its vapour pressure (in $mm$ ) at the same temperature will be