Question # 1

The relative lowering of vapour pressure is equal to the mole fraction of the solute is statement of

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Rault law

Henry law

Dalton law

Grahms law

Which one of the following solution will have higher vapour pressure than that of water

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Aqueous solution of methanol

Aqueous solution of HCI

Aqueous solution of glucose

Aqueous solution of urea

Solubility of a substance in water decreases with rise in temperature except

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CaCI₂. 6H₂O

Pb(NO₃)₂

K₂Cr₂O₇

Ce₂(SO₄)₃

Azeotropic mixture of HCl and water has

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48% HCl

22.2% HCl

36% HCl

20.2% HCl

Compared to a 1.0M aqueous solution of calcium chloride will have

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The same freezing and boiling point

A lower freezing point and lower boiling point

A lower freezing point and higher boiling point

A higher freezing point and higher boiling point

A solution of glucose is of methanol in water has vapor pressure :

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Equal that of water.

Equal to that of methanol.

More than that of water.

Less than that f water.

The osmotic pressure of 1 m solution at 27°C is

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2.46 atm

24.6 atm

1.21 atm

12.1 atm

Coligative properties are the properties of

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Dilute solution which behave as nearly ideal solutions

Concentrated solutions which behave as nearly non-ideal solution

Both (i) and (ii)

Neither (i) and (ii)

What happens when isotonic solution of A (mol.wt.342) and B (mol.wt 60) are put in to communication through semipermeable membrane?

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Transference of solvent from solution A to that of B take place

Transference of solvent from solution B to that of A takes place

No transference of solvent from solution A to that of B takes place

Change in temperature of solutions takes place

What is the molarity of a solution containing 15.0 g urea in 500 cm³of solution

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0.5 M

1 M

1.5 M

2 M

In which type of following solutions the total volume of solutions may not be necessarily equal to sum of volumes of solute and solvent ?

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Percentage volume/volume

Percentage volume/weight

Percentage weight/volume

Percentage weight/weight

The boiling point of an a zeotropic mixture of water and ethye alcohol is less than that of water and alcohol. The mixture shows

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That solution is highly saturated

No deviation from Raoult's law

Positive deviation from Raoult's law

Negative deviation from Raoult's law

Every sample of matter with uniform properties and a fixed composition is called a :

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Solid

Liquid.

Phase.

Gas.

A solution has 92 g of ethyl alcohol, 96 g of methyl alcohol and 90 g of water. Mole percentage of ethyl alcohol in the solution is

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10

20

25

50

The term cryoscopy is used for

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Depression of freezing point

Elevation in boiling poing

Lowering of vapour pressure

Osmotic pressure

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