Question # 1

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

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1/5

5.1

1/51

6

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

Solutions containing relatively lower concentrations of solute are called :

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Concentrated solutions.

Lighter solutions.

Dilute solutions.

None of above.

Which inorganic precipitate acts as semipermeable membrane?

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Calcium sulphate

Barium oxalate

Nickel phosphate

Copper ferrocyanide

3.6% WN solution of HCI has the molairity

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1.0

1.15

0.98

1.98

The molarity of the solution containing x grams (NH₄)₂SO₄in 500 cm³of the solution is 0.6 what is x

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39.6

45.1

40.5

42.7

Which of the following liquid pairs shown a positive deviation from Raoult's law

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CH₃COOH₃+ CH₃CI

C₆H₆+ CH₄OH

H₂O + HCI

H₂O + HNO₃

If 5.85 g of NaCl are dissolved in 90 g of water, the mole fraction of NaCl is

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0.1

0.01

0.2

0.0196

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.

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

Zeotropic mixture

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Obey Henry's law

Obey Raoult's law

Does not obey Raoult's law

Obey Dalton's law

The freezing point of 1 molal NaCl solution assuming NaCl to be 100% dissociated in water in

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-1.86°C

-3.72°C

+1.86°C

+3.72°C

A solution contains 1.2046 x 10²⁴hydrochloric acid molecules in one dm³of the solution. The strength of the solution is

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6 N

2 N

4 N

8 N

If ionic product of a solution is greater than solubility product, the solution is

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Supersaturated

Saturated

Unsaturated

None of these

The osmotic pressure of solution increases if

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Temperature is decreased

Solution constant is increased

Number of solute molecules are increased

Volume is increased

Mixture of alcohol and water can be separated by

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Solvent extraction techniques

Crystallization

Precipitation and filtration

Fractional distillation

The number of moles of solute in 1000g (1 Kg) of the solvent is called :

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Molarity

Normality

Mole fraction

In which type of following solutions we don't know the total volume of the solutions :

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Percentage weight/weight

Percentage weight/volume

Percentage volume/volume

Percentage volume/weight

The molal depression constant depends upon

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Nature of solute

Nature of solvent

Δ H_solution

Vapour pressure of solution

If the ionic product of a solution is less than the solubility product, the solution is

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Supersaturated

Unsaturated

Ideal

Saturated

Which one of the following is a colligative property?

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Surface tension

Osmotic pressure

Viscosity

Refractive index

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

The substance which contains the water of crystallization is called

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Hydrated

Solvated

Crystal

None

The amount of solute present in the given amount of solvent is called

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Molarity

Molality

Concentration

Solubility

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)

Which of the following mixture of liquids show negative deviation form Raults law

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Ethyl alcohol and ether

HCI and water

Phenol- water

Chlorobenene-bromobenene

Number of moles of the solute dissolved per dm³of the solution is knows as

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Molarity

Formality

%age

None of these

0.1 molar glucose (C₆H₁₂O₆) solution has the % W/N

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1.8%

18%

0.18%

2.8%

Which if the following has the highest freezing point at one atmosphere

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0.1 M NaCI

0.1 M sugar solution

0.1 M BaCI₂

0.1 M FeCI₂solution

An azeotropic mixture of two liquids boils at a lower temperature than either of them when :

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It is saturated.

It shows positive deviation from Raoult's law.

It show negative deviation from Raoult's law.

It is metastable.

The number of moles of solute dissolved per dm³of the solution is called :

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Normality.

Molarity.

None of above.

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