Discuss briefly the effect of temperature on surface tension.

Discuss briefly the effect of temperature on viscosity.

State Raoult's law. A solution of $2.4 \mathrm{g}$ of a substance in $25 \mathrm{g}$ water boiled at $100.8°\mathrm{C}$ at $1 \mathrm{atm}$ pressure. Calculate the molecular mass of the substance  (in $\mathrm{g}/\mathrm{mol}$). (Boiling elevation constant for water$=0.52°\mathrm{C}$ per $1000 \mathrm{g}$ of it).

Define molality of a solution.

Define molarity of a solution.

Define Molality. $29.25 \mathrm{g}$ of $\mathrm{NaCl}$ is present in $529.25 \mathrm{g}$ of the solution. Find out the molality.

What is the molality of a solution containing $40 \mathrm{g}$ of $\mathrm{NaOH}$ in $1000 \mathrm{mL}$ of water?

Write down the equation that will show the relationship between normality and molarity.