Some Basic Concepts – Importance of Chemistry, Matter, Laws of Chemical Combination

Grade 11 Chemistry — Some Basic Concepts – Importance of Chemistry, Matter, Laws of Chemical Combination: 25 practice questions with instant scoring and explanations.

1. Which of the following is NOT a state of matter?
2. The Law of Conservation of Mass states:
3. The Law of Definite Proportions states that:
4. Law of Multiple Proportions explains:
5. Chemistry primarily studies:
6. An example of a physical change is:
7. A characteristic property of matter is:
8. In H₂O, if O = 8g per H = 1g, mass ratio O:H is:
9. The smallest particle of an element is:
10. Which represents a chemical change?
11. The smallest particle of a compound is:
12. CO and CO₂ mass ratio according to law:
13. About physical and chemical changes:
14. Chemistry importance excludes:
15. In reactions, consumed substance is:
16. Pure substances are:
17. Heterogeneous mixture example:
18. Law of Definite Proportions formulated by:
19. 3.2g CuO mass ratio Cu:O:
20. Breaking chemical bonds indicates:
21. Sublimation is:
22. Element combining capacity is:
23. NO, NO₂, N₂O₄ formation exemplifies:
24. Compound differs from mixture in:
25. Chemistry is important for: