Reference no: EM132362973

What are the answers to these two questions?

1: "Which of the physical properties I) the abilities of the compounds to adsorb II) boiling points III) solubility is/are used for separation of the components of a mixture by chromatography? 1. I and II only 2. II and III only 3. II only 4. None of these 5. I and III only 6. III only 7. I only 8. All of these"

2: "Consider the statement: "Copper is a red-brown element obtained from copper sulfide ores by heating the ores in air, which forms copper oxide. Heating the copper oxide with carbon produces impure copper, which is purified by electrolysis." How many of these, I) color II) heating with carbon III) purification by electrolysis are chemical properties or changes? 1. 2 2. 1 3. None 4. 3"