Question # 1

Which one of the following salts do not hydrolyses

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CuSO4

Na2CO3

NaCl

AlCl3

Relative lowering of vapour pressure is equal to.

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Mole fraction of solute

Mole fraction of solvent

Mole fraction of solute and solvent

Molality of solution

10 g of NaOH have been dissolved per kg of solvent The molality of solution.

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0.25 m

0.5 m

1.0 m

2.0 m

10 g of NaOH has been dissolved per dm3 of solution. The molarity of solution is.

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0.5 M

0.25 M

1 M

2 M

The molar boiling point constant is the ratio of the elevation of boiling point to .

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Molarity

Molality

Mole fraction of solvent

Mole fraction of solute

Solubility of which substance decreases by increasing temperature.

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NaNO3

KNO2

NaCl

Ce2(SO4)3

The sum of mole percent of all the components of solution is always equal to.

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Unity

100

Less than one

Less than 100

Colligative 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 solutions

Both a and b

Neither a nor b

What amount of NaOH is required to prepare 500 g of 0.5 molal solution.

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10 g

20 g

30 g

40 g

Azeotropic mixture

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Obey Raoult's law

Do not obey Raoult's law

Boils at low temperature only

Boils at high temperature only

Which of the following mixtures of liquids show negative deviation

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Methyl alcohol water

Hydrochloric acid water

Carbon di sulphide chloroform

Chlorobenzene bromobenzene

A solution of sucrose is 34.2% The volume of solution containing one mole of solute.

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500 cm3

1000 cm3

342 cm3

3420 cm3

18 g of glucose is dissolved in 90 g of water. The relative lowering of vapour pressure is equal to

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1/5

5.1

1/51

6

The temperature which partially immiscible pair of liquid leads to the formation of a single phase in called.

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Transition temperature

Absolute temperature

Consulate temperature

Room temperature

Salt of weak acid with strong base when dissolved in water gives.

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Acidic solution

Basic solution

Neutral solution

None of above

Depression of freezing point method is used for determination of molar masses of

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Electrolytes

Non-volatile solids

Volatile solids

Volatile liquids

The molarity of 2% w/v NaOH solution is

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2

0.25

0.05

0.5

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