Alpha Question Bank for Engineering: Chemistry>Chapter 8 - Solutions>Exercise-2>Q 42

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At $35 ° C$ , the vapour pressure of ${CS}_{2} is 512 mm Hg$ , and of acetone is $344 mm Hg$ . A solution of ${CS}_{2}$ and acetone in which the mole fraction of ${CS}_{2} is 0.25$ , has a total vapour pressure of $600 mm Hg$ . Which of the following statements is/are correct?

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Alpha Question Bank for Engineering: Chemistry>Chapter 8 - Solutions>Exercise-2>Q 44

In which of the following pairs of solutions will the values of the Vant Hoff factor be the same?

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Alpha Question Bank for Engineering: Chemistry>Chapter 8 - Solutions>Exercise-2>Q 45

2 g

of non-volatile hydrocarbon solute dissolved in

100 g

of hypothetical organic solvent

(molar mass = 50)

was found to lower vapour pressure from

75.50 to 75 mm of Hg at 20 ° C

. Given that hydrocarbon contains

96 % of C .

Then which of the following are true?

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Alpha Question Bank for Engineering: Chemistry>Chapter 8 - Solutions>Exercise-2>Q 46

In the depression of freezing point experiment, it is found that the

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Alpha Question Bank for Engineering: Chemistry>Chapter 8 - Solutions>Exercise-2>Q 48

Which facts are true when we use Van't Hoff equation

PV = nST

for osmotic pressure

P

of dilute solution?

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Alpha Question Bank for Engineering: Chemistry>Chapter 8 - Solutions>Exercise-3>Q 1

A compound

H_{2} X

with molar weight of

80 g

is dissolved in a solvent having density of

0.4 g {mL}^{- 1}

. Assuming no change in volume upon dissolution, the molality of a

3.2

molar solution is

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Alpha Question Bank for Engineering: Chemistry>Chapter 8 - Solutions>Exercise-3>Q 2

Which concentration term is affected by change in temperature?

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

5.2

molal aqueous solution of methyl alcohol

{CH}_{3} OH

is supplied. What is the mole fraction of methyl alcohol in the solution?

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Alpha Question Bank for Engineering: Chemistry>Chapter 8 - Solutions>Exercise-3>Q 4

The molarity of a solution obtained by mixing

750 mL

of

0.5 (M) HCl

,

250 mL

of

2 (M) HCl

will be: