A) Henry law
B) Dulong and Petit law
C) Raoult's law
D) Le-Chatelier's principle
Correct Answer: C
Solution :
Raoult's law: For a solution containing non volatile solute at a given temperature is equal to the mole fraction of solute. \[\frac{P_{A}^{o}-{{P}_{A}}}{p_{A}^{o}}={{x}_{B}}\] (mole fraction of solute) \[p_{A}^{o}=\] vapour pressure of pure solution \[{{p}_{A}}=\] vapour pressure of solution \[{{x}_{B}}=\frac{moles\,of\,solute}{moles\,of\,solute+solvent}\] Henry law: The solubility of a gas at a given temperature is directly proportional to the pressure at which it is dissolved. Mole fraction of a gas \[({{x}_{B}})\propto P\] Dulong and Petit's law: For any element Atomic mass \[\times \] specific heat \[\approx 6.4\] Le-Chatelier's principle: If a system in equilibrium is subjected to a change of concenteration, pressure or temperature, the equilibrium shifts in the direction that tends to undo the effect of the change.
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