What does raoult's law state? a. the vapor pressure of a pure solvent is higher than that of a solution containing that solvent. b. the vapor pressure of a pure solvent is lower than that of a solution containing that solvent. c. the vapor pressure of a solute is the same as the vapor pressure of the solvent. d. the vapor pressure of a solute is greater than that of a pure solvent.

Correct Answer is A:  The vapor pressure of a pure solvent is higher than that of a solution containing that solvent.

Reason
According to Raoult's Law states that vapor pressure of each component in the solution is equal to the vapor pressure of the pure component multiplied by its mole fraction. It is mathematically expressed as
P = X 
where, P = vapor pressure of solution
X = mole fraction of solute
P^{0} [/tex] = vapor pressure of pure component

Here X is always less than one (in solutions)

∴ P < P^{0} [/tex]

Ifound this on google “these two compounds have a different ionic structure. caesium ion is larger in size when compared to the sodium ion. the charge gets more area to spread out evenly. so caesium chloride has a lower melting point than sodium chloride.” i hope this you for what your looking for