Answer:
Question 4 is- Solubility
Question 5 is- Suspension
Hopes this helps >:D
The answer to letter b is
If the mass of all of the products in a chemical reaction is equal to 100g then the mass of the reactants in that same reaction had to have had a mass of 100g this is due to the law of conservation of matter stating matter cannot be created or destroyed in a chemical reaction.