Question # 1

In azeotropic mixture showing positive deviation from Raoult's law the volume of the mixture is

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Slightly more than the total volume of the components

Slightly less than the total volume of the components

Equal to the total volume of the components

None of these

The liquid pair which is not completely miscible is

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CH₃OH and water

Alcohol and water

Phenol and water

Benzene and toluene

An aqueous solution of ethanol in water has vapour pressure

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Equal to that water

Equal to that of ethanol

More than that of H₂O

less than that of water

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

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

In azeotropic mixture showing positive deviation from Raoult's law, the volume of the mixture is.

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slightly more than the total volume of the components

Slightly less than the total volume of the component

Equal to the total volume of the components

None of these

The molal boiling point constant is the ratio of elevation of boiling point to

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Molarity

Mole fraction of solvent

Molality

Mole fraction of solute

A solution of glucose is 10% The volume in which 1 g mole of it dissolved will be.

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1 dm3

1.8 dm3

900 cm3

200 cm3

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

The vapour pressure of an aqueous solution of glucose is.

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Equal to vapour pressure of water

Independent of temperature

More than vapour pressure of pure water

Less than vapour pressure of pure water

Heat of solution of an ionic compound is equal to.

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Hydration energy

Lattice energy

Slum of both 'a' and 'b'

Difference of both a and b

The molal boiling point constant is the the ratio of the elevation in boiling point to.

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Molarity

Molality

Mole fraction of solvent

Mole fraction of solute

Azeotrpic mixture of two liquids boils at a lower temperature than either of them, when

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It is saturated

Is shows positive deviation from Raoult's law

It shows negative deviation from Raoult's law

Is is metastable

When an ionic compound is dissolved in water, it dissociate into positive and negative ions, which are surrounded byH2O molecule, This process is known as.

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Hydrolysis

Hydration

Saturation

solvolysis

Which of the following solution s has the highest boiling point.

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5.85% solution of sodium chloride

18.0 % solution of glucose

6.0% solution of urea

All have the same boiling point

Which one of the following salts dissolved in water to form a solution with a pH greater than 7

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NaCl

CuSO4

Na2CO3

NH4Cl

In case of non volatile solute, lowering of vapour pressure is proportional to.

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Mass fraction of solute

Mole fraction of solvent

Mole fraction of solute

None of the above

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