Alpha Question Bank for Medical: Chemistry>Chapter 8 - Solutions>Exercise 1>Q 98

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Consider equimolal aqueous solutions of ${NaHSO}_{4}$ and $NaCl$ with ${ΔT}_{b}$ and ${ΔT}_{b}^{'}$ as their respective boiling point elevations. The value of $\underset{m - 10}{Lt} \frac{{ΔT}_{b}}{{ΔT}_{b}^{'}}$ will be:

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Alpha Question Bank for Medical: Chemistry>Chapter 8 - Solutions>Exercise 1>Q 99

1.0

molal aqueous solution of an electrolyte

X_{3} Y_{2}

is

25 %

ionized. The boiling point of the solution is-

(K_{0}

for

H_{2} O = 0.52 Kkg / mol)

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Alpha Question Bank for Medical: Chemistry>Chapter 8 - Solutions>Exercise 1>Q 100

A solution containing

28 g

of phosphorus in

315 g {CS}_{2} (b . p . 46.3 ° C)

boils at

47.98 ° C .

If

K_{b}

for

{CS}_{2}

is

2.38 {Kkgmol}^{- 1} .

The formula of phosphorus is (at. mass of

P = 31

).

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Alpha Question Bank for Medical: Chemistry>Chapter 8 - Solutions>Exercise 1>Q 101

A complex of iron and cyanide ions is

100 %

ionised at

1 m

(molal). If its elevation in boiling point is

2.08 K . (K_{b} = 0.52 {Kmol}^{- 1} kg),

then the complex is:

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Alpha Question Bank for Medical: Chemistry>Chapter 8 - Solutions>Exercise 1>Q 102

What is the effect of the addition of sugar on the boiling and freezing points of water?

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Alpha Question Bank for Medical: Chemistry>Chapter 8 - Solutions>Exercise 1>Q 103

Which of the following aqueous molal solution have the highest freezing point?

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Alpha Question Bank for Medical: Chemistry>Chapter 8 - Solutions>Exercise 1>Q 104

Glucose is added to

1 litre

water to such an extent that

\frac{{ΔT}_{f}}{K_{f}}

becomes equal to

\frac{1}{1000},

the weight of-

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Alpha Question Bank for Medical: Chemistry>Chapter 8 - Solutions>Exercise 1>Q 105

What should be the freezing point of aqueous solution containing

17 g

of

C_{2} H_{5} OH

in

1000 g

of water? (water

K_{f} = 1.86 ° Ckg {mol}^{- 1}

)

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Alpha Question Bank for Medical: Chemistry>Chapter 8 - Solutions>Exercise 1>Q 106

1.00 g

of non-electrolyte solute (molar mass

250 g

{mol}^{- 1}

) was dissolved in

51.2 g

of benzene. If the freezing point depression constant,

k_{f}

of benzene is

5.12 K kg {mol}^{- 1},

the freezing point of benzene will be lowered by: