Question # 1

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

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8.1 dm³

1.7 dm³

1.8 dm³

6.1 dm³

Elevation of boiling point is measured by

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Beckmann's apparatus

Lands Berger's method

Antifreeze apparatus

None of these above

Which one of the following has discontinuous solubility curve

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CaCI₂6H₂O

NaCI

KCI

NaNO₃

Which of the following aqueous solutions have the lowest freezing point

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5.85% NaCI

6% urea

34.2 sucrose

All of them have same freezing points

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

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Supersaturated

Saturated

Unsaturated

None of these

Saturated solution of NaCl on heating becomes

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Super saturated

Unsaturated

Remains saturated

None

Which one of the following is a colligative property?

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Surface tension

Osmotic pressure

Viscosity

Refractive index

Which of the following solution 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

The molar boiling point constant is the ration of elevation in boiling point to :

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Molarity

Mole fraction of solvent

Mole fraction of solute.

Which one of the following mixture shows positive deviation form Rault's law and forms an azetrope with minimum boiling point

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Methanol + CCI₄

Methanol + acetone

Ether + HCI

Acetone + chloroform

A homogeneous mixture of two or more than two chemical substances is called

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Solute

Solution

Solvent

Salvation

3.6% WN solution of HCI has the molairity

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1.0

1.15

0.98

1.98

The vant Hoff factor (1) accounts for

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Degree of solubilisation of solute

The extent of dissolution of solute

The degree of decomposition of solution

If liquids A and B form an ideal solution

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The enthalpy of mixing is zero

The entropy of mixing is zero

The free energy of mixing is zero

The free energy as well as the entropy of mixing are each zero

Water shows maximum density at

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4°C

0°C

100°C

-4°C

The temperature at which the vapour pressure of a liquid becomes equal to external pressure is

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Melting point

Sublimation point

Inversion point

Boiling point

The volume of 0.1 M H₂SO₄required to neutralize completely 40 ml of 0.2 M NaOH solution is

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10 ml

40 ml

20 ml

50 ml

The movement of solvent molecules through a semipermeable membrane is called

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Electrolysis

Electrophoresis

Osmosis

Cataphoresis

A solution of two component is called

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Binary solution

Dilute solution

Original solution

Standard solution

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

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0.1

0.01

0.2

0.0196

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 process in which the solvent molecules are surrounded and interact with solute ions or molecules is called

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Solvation

Hydration

Hydrogenation

None

Units of molarity are

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gm/lit

mol/lit

kg/lit

None of these

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

A Solution containing 6.8 g of non-ionic solute in 100g of water was found to freeze at -0.93°C. If k_rfor water is 1.86 and molecular mars of solute is

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13.6

34

68

136

The concentration units independent of temperature would be

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Normality

Mass-volume precent

Molality

Molarity

A solutiion of 0.5 mole camphor in 100 grmas chloroform (K_b= 0.322) has rise in boiling point than that of chloroform by

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0.81°C

1.61°C

1.81°C

0.61°C

Use of glycol as anti freeze in the automobile is an important application of

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Colligative property

Raoult's law

Fractional crystallization

Prrhenivs law

A solution consisting of 92 grams ethyl alcohol (C₂H₅OH) 96 grams methyl alcohol (CH₃OH) 90 grams water the mole fraction and mole percent of methyl alcohol is

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0.3. 30%

0.2, 30%

0.5, 30%

0.2, 20%

Which one of the following is used as antifreeze in the radiator

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Methanol

Ethanol

Ethylene glycol

Glycerin

How many cm³of 1 M H₂SO₄required to neutralize 10 cm³of 1 M NaOH

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2 cm³

2.5 cm³

5 cm³

10 cm³

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