Chemistry Quiz 18 (25 MCQs)

Quiz Instructions:

Select an option to see the correct answer instantly.

1. Which two elements do all organic compounds contain?

2. Which of the following is an example of synthesis?

3. Which one is a decomposition reaction?

4. What elements generally make an ionic bond?

5. Which statement correctly describes the 2 electrodes?

6. What is the density of water?

7. Choose the number of atoms present in 1mole of He

8. Classify the following as a physical change or a chemical change:dissolving salt in water

9. Particles (molecules) in a _____ have more energy than the other states of matter.

10. What is the symbol of Sodium

11. Why can't covalent substances conduct electricity?

12. Why does breaking up a solid reactant increase the rate of reaction?

13. Matter is anything that _____

14. A subatomic particle that has a negative charge

15. How many electrons does Oxygen need to fill its outer shell?

16. A pure substance that is a compound is made out of

17. Classify the following as a physical change or a chemical change:Boiling water

18. What does the atomic mass tell you?

19. Which of the following phase changes is exothermic?

20. Which property of water is important to the survival of aquatic organisms during the winter months?

21. A _____ is made up of two or more different atoms, chemically combined.

22. Which of the following is an example of decomposition?

23. A small group of atoms bonded covalently is called _____

24. Measure of the amount of matter an object has.

25. The term molar, which describes a solution's concentration, is written as?