Stoichiometry
Real gases approach ideal behaviour at

Low pressure & low temperature
Low pressure & high temperature
High pressure & low temperature
High pressure & high temperature

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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

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

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

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

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