Chemistry Quick Quiz: Reactions

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Chemical reaction basics

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Chemistry Quick Quiz: Reactions


Froggy Jumps Chemistry Quick Quiz: ReactionsVersión en línea Chemical reaction basics por Renzze Pineda 1 1. Which of the following is an indicator that a chemical reaction has occurred? a C. Change in shape b A. Change in color c B. Change in size 2 2. When vinegar is mixed with baking soda, bubbles are produced. What indicator of chemical reaction is observed? a B. Change in mass b A. Formation of gas c C. Change in texture 3 3. Pat mixes two clear liquids and observes that a solid forms at the bottom of the container. What indicator of a chemical reaction is shown? a A. Release of odor b B. Change in speed c C. Formation of a precipitate 4 4. During an experiment, a student notices that a liquid suddenly becomes warm without being heated. Which indicator suggests that a chemical reaction occurred? a A. Change in temperature b D. Change in shape c B. Change in weight 5 5. A rotten egg smell is produced during an experiment. Which indicator of chemical reaction is observed? a A. Formation of precipitate b D. Change in mass c B. Release of odor 6 6. Which substance is an example of an acid? a A. Sodium hydroxide b D. Soap solution c B. Hydrochloric acid 7 7. Which substance is an example of a base? a A. Hydrochloric acid b B. Sodium hydroxide c D. Vinegar 8 8. Which indicator can be used to identify whether a substance is acidic or basic? a B. Litmus paper b A. Thermometer c D. Magnet 9 9. A student uses blue litmus paper to test a substance. The paper turns red. What can the student conclude? a D. The substance is neutral b A. The substance is a base c B. The substance is an acid 10 10. A student tests a solution using red litmus paper, and it turns blue. Which type of substance is most likely being tested? a B. Base b C. Salt solution c A. Acid 11 11. Which type of chemical reaction occurs when two or more substances combine to form a single product? a B. Combination reaction b D. Double replacement reaction c A. Decomposition reaction 12 12. Which type of reaction occurs when one compound breaks down into simpler substances? a B. Single replacement reaction b C. Decomposition reaction c A. Combination reaction 13 13. In which reaction does one element replace another element in a compound? a C. Double replacement reaction b D. Decomposition reaction c A. Single replacement reaction 14 14. Which of the following equations represents a decomposition reaction? a A. A + B → AB b C. AB → A + B c B. A + BC → AC + B 15 15. What type of reaction happens when two substances exchange parts and form two new substances? a B. Single replacement reaction b D. Double replacement reaction c A. Combination reaction 16 16. Which type of chemical reaction occurs when fuel burns and releases energy? a C. Combustion b A. Respiration c B. Photosynthesis 17 17. Plants use carbon dioxide, water, and sunlight to make food through which process? a B. Photosynthesis b D. Acid reaction c A. Respiration 18 18. When an acid reacts with a metal, what is commonly produced? a D. Carbon dioxide only b A. Salt and hydrogen gas c B. Oxygen gas only 19 19. A student mixes vinegar with baking soda and observes bubbles forming. Which gas is released during the reaction? a C. Carbon dioxide b B. Hydrogen c A. Oxygen 20 20. Why are photosynthesis and respiration important in maintaining balance in the environment? a D. They help cycle oxygen and carbon dioxide in nature b A. They only occur in animals c B. They both produce only oxygen 21 21. Why do scientists use chemical equations? a A. To describe chemical reactions b D. To determine weight only c B. To measure temperature 22 22. Which is a word equation for the reaction of hydrogen and oxygen forming water? a B. H + O → HO b A. H2 + O2 → H2O c C. Hydrogen + Oxygen → Water 23 23. Which equation is written in symbol/formula form? a D. Sodium + Chlorine → Sodium chloride b A. 2H2 + O2 → 2H2O c B. Hydrogen + Oxygen → Water 24 24. Which pair correctly matches the word equation with its chemical equation? a C. Hydrogen + Oxygen → Water ; H2 + O2 → H2O b A. Water → Hydrogen + Carbon ; H2O → HC c B. Sodium + Water → Salt ; Na + H2O → NaCl 25 25. What is a chemical reaction? a A. A process where only size changes b D. A process where substances change into new substances c B. A process where matter disappears

Chemistry Quick Quiz: Reactions

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Chemistry Quick Quiz: ReactionsVersión en línea

por Renzze Pineda

1. Which of the following is an indicator that a chemical reaction has occurred?

2. When vinegar is mixed with baking soda, bubbles are produced. What indicator of chemical reaction is observed?

3. Pat mixes two clear liquids and observes that a solid forms at the bottom of the container. What indicator of a chemical reaction is shown?

4. During an experiment, a student notices that a liquid suddenly becomes warm without being heated. Which indicator suggests that a chemical reaction occurred?

5. A rotten egg smell is produced during an experiment. Which indicator of chemical reaction is observed?

6. Which substance is an example of an acid?

7. Which substance is an example of a base?

8. Which indicator can be used to identify whether a substance is acidic or basic?

9. A student uses blue litmus paper to test a substance. The paper turns red. What can the student conclude?

10. A student tests a solution using red litmus paper, and it turns blue. Which type of substance is most likely being tested?

11. Which type of chemical reaction occurs when two or more substances combine to form a single product?

12. Which type of reaction occurs when one compound breaks down into simpler substances?

13. In which reaction does one element replace another element in a compound?

14. Which of the following equations represents a decomposition reaction?

15. What type of reaction happens when two substances exchange parts and form two new substances?

16. Which type of chemical reaction occurs when fuel burns and releases energy?

17. Plants use carbon dioxide, water, and sunlight to make food through which process?

18. When an acid reacts with a metal, what is commonly produced?

19. A student mixes vinegar with baking soda and observes bubbles forming. Which gas is released during the reaction?

20. Why are photosynthesis and respiration important in maintaining balance in the environment?

21. Why do scientists use chemical equations?

22. Which is a word equation for the reaction of hydrogen and oxygen forming water?

23. Which equation is written in symbol/formula form?

24. Which pair correctly matches the word equation with its chemical equation?

25. What is a chemical reaction?