4. Which statement in NOT TRUE regarding pure substance? a. Pure substance are homogeneous. a. b. Pure substance are made up of only one kind of element. Pure substances boil and melt at a particular temperature. d. Pure substances are compounds can be further broken down into simpler substances. 5. Mixtures can be separated by physical methods while pure substances cannot. Which of the following groups contain only pure substances? Carbon dioxide, water, air c. Ammonia, vinegar, silicon b. Iron, ethanol, calcium fluoride d. Air, methane, sodium chloride 6. Which of the following statements distinguishes pure substances from mixture? Mixtures and substances consist of two or more kinds of matter. b. Mixtures and substances have no specific solubility and densities. Mixture can be separated by physical means while substances cannot. d. Mixtures have constant boiling and melting temperature while substances don't have. 7. Which of the following lists of materials are composed of mixtures? Blood, calamansi juice, air c. Vinegar, 70% alcohol, carbon b. Carbon dioxide, bleach, oil d. Oxygen, sodium chloride, water a. C. a.
