Question # 1

An aqueous solution of ethanol in water has vapour pressure.

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Equal to that of water

Equal to that of ethanol

More than that of water

Less than that of water

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

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

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

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NaCl

CuSO4

Na2CO3

NH4Cl

Melting of ice can be forwarded by the use of.

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LiCl

BeCl2

NaCl

Ag Cl

Relative lowering of vapour pressure is equl to.

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Mole fraction of solute

Mole fraction of solvent

Molarity

Molality

The unit of mole fraction is

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Moles dm^-3

Moles kg^-1

Gram dm^-3

None

Solubility of which substance decreases by incressing temperature.

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NaNO3

KNO2

NaCl

Ce2(SO4)3

Molal boiling constant for water is 0.52 ^oC. If 6 g of urea is dissolved in 100 g of water, what will be its boiling point.

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100.52 ^oC

-100.52^oC

100^oC

99^oC

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 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

Colligative properites are the properties of

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Dilute solutions which behave as nearly ideal solution

Concentrated solution which behave as nearly non-ideal solution

Both a and b

Neither a nor b

Which of the following solutions will have the highest boiling point

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0.1 M NaCI

0.1 M CaCI₂

0.1 M FeCI₃

0.1 M glucose

The molarity of 2% w/v NaOH solution is

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2

0.25

0.05

0.5

Colligative properties are used to determine the

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Freezing points

Boiling point

Atomic mass of an element

Molar mass of solute

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

An aqueous solution of ethanol is water has vaporu pressure.

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Equal to the of water

Equal to that of ethanol

More than that of H2O

Less than that of water

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Chemistry Fsc Part 1 Chapter 9 Online Test MCQs With Answers

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