STOICHIOMETRY QUIZ

Kopp's rule is helpful in finding the

Molal heat capacities of gases

Heat capacities of solids

Heat capacities of gases

Activation energy

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Which of the following has the least (almost negligible) effect on the solubility of a solute in a solvent?

Nature of solute

Pressure

Temperature

Nature of solvent

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According to Raoult's law, "The vapor pressure exerted by component in a solution is proportional to the mole fraction of that component." Raoult's law is not applicable under the following assumption/condition.

In the formation of solution, chemical combination/molecular association between unlike molecules takes place

The attractive forces between like and unlike molecules are almost equal

The component molecules are non polar and are of almost equal size

No component is concentrated at the surface of the solution

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Number of gram equivalent of solute dissolved in one litre of solution is called its

Molality

Normally

Molarity

Formality

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Concentration of a solution expressed in terms of __________ is independent of temperature.

Molarity

Molality

None of these

Normality

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Assuming applicability of ideal gas law, the pure component volume of the vapor in a saturated gas can be calculated from theoretical relationship. The volumetric composition of a vapor saturated gas is independent of the

Nature of the liquid

Nature of the gas

Temperature of the liquid

Total pressure

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Solution made by dissolving equimolar amounts of different solutes in the same amount of a given solvent will have the

Different elevation in boiling point

None of these

Elevation in boiling point in the ratio of their molecular weights

Same elevation in boiling point

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Molar heat capacity of water in equilibrium with ice at constant pressure is

∞

1

None of these

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Two solutions A₁ and A₂ have pH value of 2 and 6 respectively. It implies that the solution

A₁ is highly acidic

A₁ is more alkaline than solution A₂

Both A & C

A₁ is very slightly acidic

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Raoult's law states that 'the equilibrium vapor pressure that is exerted by a component in a solution is proportional to the mole fraction of that component'. This generalisation is based on the assumption that the

Sizes of the component molecules are approximately equal

Component molecules are non-polar and no chemical combination or molecular association between unlike molecules takes place in the formation of the solution

Attractive forces between like and unlike molecules are approximately equal

All of these

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