Why is glycol and water mixture used in car radiators in cold countries?

Note: In the following questions a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
Assertion: When a solution is separated from the pure solvent by a semipermeable membrane, the solvent molecules pass through it from pure solvent side to the solution side.
Reason: Diffusion of solvent occurs from a region of high concentration solution to a region of low concentration solution.

State any two characteristics of ideal solutions.

What do you mean by 10% aqueous solution of sodium carbonate?

Why are the aquatic species more comfortable in cold water in comparison to warm water?

When and why is molality preferred over molarity in handling solutions in chemistry?

Define ‘mole fraction’ of a substance in a solution.

Suggest the most important type of intermolecular attractive interaction in the following pairs.
n-hexane and n-octane.

How does the molarity of a solution change with temperature?

Suggest the most important type of intermolecular attractive interaction in the following pairs.
methanol and acetone.