(Q).
Q: What type of reaction is a process in which some substances, called reactants, change into different substances, called products? Choices: - reversible reaction - physical reaction - toxic reaction - chemical reaction A:
(A).
chemical reaction

(Q).
Q: What is a purification process where the components of a liquid mixture are vaporized and then condensed and isolated? Choices: - conduction - sterilization - dispersion - distillation A:
(A).
distillation

(Q).
Q: Crystallization separates mixtures based on differences in what, which usually increases with temperature? Choices: - density - viscosity - humidity - solubility A:
(A).
solubility