Stoichiometry
The latent heat of vaporisation

Becomes zero at the critical point
Decreases with increased temperature
Decreases as pressure increases
All of these

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Stoichiometry
In a binary liquid solution of components A and B, if component A exhibits positive deviation from Raoult's law, then component B

May exhibit either positive or negative deviation from Raoult's law
Obeys Raoult's law
Exhibits negative deviation from Raoult's law
Exhibits positive deviation from Raoult's law

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