EASY

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An 1% solution of $KCl (I), NaCl (II),$ $B a C l_{2}$ (III) and urea (IV) have their osmotic pressure at the same temperature in the ascending order (molar masses of $NaCl, KCl,$ $B a C l_{2}$ and urea are respectively 58.5, 74.5, 208.4 and 60 $g m o l^{- 1}$ ). Assume 100% ionisation of the electrolytes at this temperature

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Important Questions on Solutions

HARD

Chemistry>Physical Chemistry>Solutions>Osmosis and Osmotic Pressure

8.9 g

KCl

dissolved in

1 L

of water exhibited an apparent degree of ionization of

0.86

. The osmotic pressure exhibited by this solution is equal to the osmotic pressure of

1 L

glucose solution of unknown concentration. Calculate the glucose solution concentration in

wt . %,

(M . wt . of KCl = 74.5)

MEDIUM

Chemistry>Physical Chemistry>Solutions>Osmosis and Osmotic Pressure

Which of the following pair of solutions is isotonic?

HARD

Chemistry>Physical Chemistry>Solutions>Osmosis and Osmotic Pressure

Which of the following pairs of solution is isotonic?

(molar mass. urea $= 60$ , sucrose $= 342 g {mol}^{- 1}$ )

EASY

Chemistry>Physical Chemistry>Solutions>Osmosis and Osmotic Pressure

0.02

molar solution of

NaCl

having degree of dissociation of

90 %

27 ° C

has osmotic pressure equal to

MEDIUM

Chemistry>Physical Chemistry>Solutions>Osmosis and Osmotic Pressure

A solution is prepared by dissolving 0.6 g of urea (molar mass

= 60 g m o l^{- 1}

) and

1.8 g

of glucose (molar mass

= 180 g m o l^{- 1}

) in 100 mL of water at

27^{o} C .

The osmotic pressure of the solution is:
(

R = 0.08206 L

atm

K^{- 1} m o l^{- 1}

)

MEDIUM

Chemistry>Physical Chemistry>Solutions>Osmosis and Osmotic Pressure

0.1 M

solution of

NaCl

is isotonic with

1.1 w %

urea solution, the degree of ionisation of

NaCl

is (Molar masses of urea and

NaCl

are

60

and

58.5 g {mol}^{- 1}

, respectively.)

EASY

Chemistry>Physical Chemistry>Solutions>Osmosis and Osmotic Pressure

300 K

, a one litre solution of sucrose (molecular weight:

342

) was prepared by dissolving

40 g

of sucrose. What is the approximate osmotic pressure (in

kPa

) of the solution at the same temperature?

(R = 8.314 \times 10^{6} {cm}^{3} Pa K^{- 1} {mol}^{- 1})

EASY

Chemistry>Physical Chemistry>Solutions>Osmosis and Osmotic Pressure

At certain temperature $1.6 %$ solution of an unknown substance is isotonic with $2.4 %$ solution of Urea. If both the solutions have the same solvent and both the solutions have same density $1 gm / {cm}^{3},$ what will be the molecular mass of unknown substance in $gm {mol}^{- 1} .$

[Molecular mass of urea $= 60 gm {mol}^{- 1}$ ]

MEDIUM

Chemistry>Physical Chemistry>Solutions>Osmosis and Osmotic Pressure

Which of the following sets of solutions of urea

(mol . mass 60 g {mol}^{- 1})

and sucrose

(mol . mass 342 g {mol}^{- 1})

is isotonic?

EASY

Chemistry>Physical Chemistry>Solutions>Osmosis and Osmotic Pressure

The size of a raw mango shrinks to a much smaller size when kept in a concentrated salt solution. Which one of the following process can explain this?

EASY

Chemistry>Physical Chemistry>Solutions>Osmosis and Osmotic Pressure

Isotonic solutions are solutions having the same

HARD

Chemistry>Physical Chemistry>Solutions>Osmosis and Osmotic Pressure

The observed osmotic pressure for a

0.10 M

solution of

Fe ({NH}_{4})_{2} ({SO}_{4})_{2}

25 ° C

10.8 atm

. The expected and experimental (observed) values of Van't Hoff factor '

i

' will be respectively;

(R = 0.082 L atm k^{-} {mol}^{- 1})

EASY

Chemistry>Physical Chemistry>Solutions>Osmosis and Osmotic Pressure

Solutions

A, B, C

and

D

are

0.1 M

glucose,

0.05 M NaCl, 0.05 M {BaCl}_{2}

and

0.1 M {AlCl}_{3}

respectively. Which one of the following pairs is isotonic (at the same temperature)?

MEDIUM

Chemistry>Physical Chemistry>Solutions>Osmosis and Osmotic Pressure

T (K)

, which one of the following pairs of solutions is isotonic?

MEDIUM

Chemistry>Physical Chemistry>Solutions>Osmosis and Osmotic Pressure

Solution of

' A'

containing

3 \cdot 42 g

of it in

100 {cm}^{3}

of water is found to be isotonic with a

6.84 %

(W / v)

solution of sucrose, what is the molar mass of '

' A' ?

(at. wt;

C = 12, H = 1, 0 = 16

)

EASY

Chemistry>Physical Chemistry>Solutions>Osmosis and Osmotic Pressure

The following solutions were prepared by dissolving

10 g

of glucose

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

250 mL

of water

(P_{1}), 10 g

of urea

({CH}_{4} N_{2} O)

250 mL

of water

(P_{2})

and

10 g

of sucrose

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

250 mL

of water

(P_{3}) .

The right option for the decreasing order of osmotic pressure of these solutions is:

EASY

Chemistry>Physical Chemistry>Solutions>Osmosis and Osmotic Pressure

The widely used method for desalination of sea water to meet the requirement of potable water is

EASY

Chemistry>Physical Chemistry>Solutions>Osmosis and Osmotic Pressure

Isotonic solutions have same

MEDIUM

Chemistry>Physical Chemistry>Solutions>Osmosis and Osmotic Pressure

The osmotic pressure of a dilute solution of an ionic compound

X Y

in water is four times that of a solution

0.01 M B a C l_{2}

in water. Assuming complete dissociation of the given ionic compounds in water, the concentration of

X Y

(

i n m o l L^{- 1}

) in solution is

EASY

Chemistry>Physical Chemistry>Solutions>Osmosis and Osmotic Pressure

The osmotic pressure of solution containing 34.2 g of cane sugar (molar mass =

342 g m o l^{- 1}

in 1L of solution at

20^{o}

C is

(G i v e n, R = 0.082 L a t m K^{- 1} m o l^{- 1})

An 1% solution of KCl (I), NaCl (II), BaCl2 (III) and urea (IV) have their osmotic pressure at the same temperature in the ascending order (molar masses of NaCl, KCl, BaCl2 and urea are respectively 58.5, 74.5, 208.4 and 60 g mol-1). Assume 100% ionisation of the electrolytes at this temperature

Important Questions on Solutions

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