In an aqueous solution of $NaCl$,the mole fraction of the solvent is $0.9$. Then,the relative lowering in vapour pressure will be ......... $atm$.

$AB_2$ is $10\%$ dissociated in water to $A^{2+}$ and $B^{-}$. The boiling point of a $10.0 \text{ molal}$ aqueous solution of $AB_2$ is . . . . . . $^\circ C$. (Round off to the Nearest Integer). [Given: Molal elevation constant of water $K_b = 0.5 \text{ K kg mol}^{-1}$,boiling point of pure water $= 100^\circ C$]

The freezing point of equimolal aqueous solution will be highest for

The van't Hoff factor $(i)$ for the reaction of $HNO_3$ with $H_2SO_4$ is:

Which one of the following $0.10 \ M$ aqueous solutions will exhibit the largest freezing point depression?

Among the given solutions,which one has the highest boiling point under similar conditions?