Chemistry questions on separation techniques

1. What happens when a piece of charcoal enclosed in a cylinder containing air is ignited?

2. Salts Y and Z were left exposed in the laboratory overnight. Y gained weight while Z became liquid. What can be inferred about these salts?

3. Which statement is true regarding the reactions in the blast furnace during iron production?

4. Which technique can demonstrate that chlorophyll pigment is a mixture of compounds?

5. How can ammonium chloride be removed from a mixture of sand and sugar after accidentally adding it to the mixture?

6. What is a common method to separate a mixture of sand and salt?

7. Which of the following describes a physical separation technique?

8. What would be the result of adding water to a mixture of oil and salt?

9. In the context of separation techniques, what is the purpose of centrifugation?

10. Which method is best suited for separating a liquid from a solid in a mixture?

11. What type of mixture can be separated by evaporation?

12. Which of the following is an example of a chemical separation technique?

13. Which separation technique relies on differences in boiling points?

14. What happens when a saturated solution of salt is cooled?

15. Which process can separate a solid from a liquid based on particle size?

16. What type of mixture is created when sand is mixed with water?

17. Which separation method would you use for separating an insoluble solid from a liquid?

18. Which of the following substances would most likely be removed using sublimation?