Classify dilute rice water, salt water, and muddy water samples into solution, colloid and suspension.

Given below are some activities and observations done by a student using samples of dilute rice water, salt water, and muddy water. Complete the table with the missing observations.

Classify and tabulate the mixtures given below into solution, colloid and suspension: Milk, fog, atmospheric air, dilute acid, lime water, ink, smoke.

Alum is used for cleaning muddy water. Give the reason?

Sodium reacts with water: If two drops of phenolphthaloin is added to the water, what will be colour change to the resultant solution? Explain the reason?

Vapour pressure of pure water at 298 K is 23.8mmHg. 50g of urea is dissolved in 850g of water. Calculate the vapour pressure of water for this solution and its relative lowering.