What is freezing point of a liquid ?

What is the freezing point of water at 1 atmospheric pressure in kelvin scales ?

What is elevation in boiling point of a liquid ? derive a relationship between molecular mass of a non-volatile solute and elevation in boiling point in a solution.

What do you mean by depression in freezing point of a solution ? How will you calculate the molecular mass of solute from depression in freezing point ? A solution containing 34.2 g cane sugar (C_12 H_22 O_11) dissolved in 500 g of water froze at - 0.374^@C . Calculate the freezing point depression constant of water.

What is the relationship between depression in freezing point of a solution and molecular mass of the solute ?