Stoichiometry
The activity co-efficient of a solution, which accounts for the departure of liquid phase from ideal solution behaviour

Is a function of the liquid phase composition
Measures the depression in freezing point
Is not dependent on the temperature
Measures the elevation in boiling point

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Stoichiometry
Variation of vapor pressure with temperature can be calculated using Clausius-Clapeyron equation, which assumes that the

Molal latent heat of vaporisation is constant within the limited temperature range
Volume in the liquid state is negligible compared with that in the vapor state
Vapor follows the ideal gas law
All of these

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Stoichiometry
A metal oxide is reduced by heating it in a stream of hydrogen. After complete reduction, it is found that 3.15 gm of the oxide has yielded 1.05 gm of the metal. It may be inferred that the

Equivalent weight of the metal is 4
Equivalent weight of the metal is 8
Atomic weight of the metal is 2
Atomic weight of the metal is 4

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