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Chemical Compounds & Reactions Chapter Exam

Exam Instructions:

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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Question 1 1. An endothermic reaction is:

Question 2 2. When the rate of the forward reaction equals the rate of the reverse reaction, what has occurred?

Question 3 3. What does an increase in temperature do the reaction rate?

Question 4 4. Suppose you were teaching a science class to middle school students. Because you want to show them an impressive chemical reaction, you decide to dissolve zinc in hydrochloric acid. You add more acid than usual and throw in pieces of zinc. What factor is not going to impact the reaction rate?

Question 5 5. Compound X is converted to elements A and B. Compound X has undergone a _____ reaction.

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Question 6 6.

If you get an equilibrium constant of less than 1 for the chemical reaction below, what does that tell you?

sodium + chlorine --> sodium chloride

Question 7 7. How is reaction rate measured?

Question 8 8.

For the following reaction, which substance(s) is (are) the reactant(s)?

sodium + chlorine --> sodium chloride

Question 9 9. What does it mean when the enthalpy change for a reaction is negative?

Question 10 10. Which of the following equations is balanced?

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Question 11 11. If you wanted to decrease the rate of reaction, what action would you need to take?

Question 12 12. When a bond forms, energy is given off to the surroundings. This is an example of

Question 13 13. A ________ bond is formed when atoms share electrons.

Question 14 14. Which type of reaction always requires oxygen to be a reactant?

Question 15 15. ________ bonds are formed when one atom gains or loses electrons to another atom.

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Question 16 16. Identify which general equation is a combination reaction.

Question 17 17. What is a coefficient?

Question 18 18. Which of the following statements about chemical compounds and elements is NOT true?

Question 19 19. Which of the following statements is true about the reaction rate constants?

Question 20 20. What does Kf/Kr tell you?

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Question 21 21. The compound carbon tetrachloride is formed when a carbon atom shares electrons with four chlorine atoms. What type of bond is this?

Question 22 22. An example of an exothermic reaction is:

Question 23 23. What makes the statement 'the presence of a catalyst will slow down a reaction' incorrect?

Question 24 24. Which of the following is a double-replacement reaction?

Question 25 25.

Choose the correctly balanced equation for the following reaction:

Potassium + water → potassium hydroxide + hydrogen gas

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Question 26 26.

Choose the correctly balanced equation for the following reaction:

Sodium + water -> sodium hydroxide + hydrogen gas

Question 27 27. Conservation of matter means that:

Question 28 28. Enthalpy change is

Question 29 29. Chemical compounds are formed when two or more ________ are joined together.

Question 30 30. The study of reaction rates with regard to chemical reactions is called:

Chemical Compounds & Reactions Chapter Exam Instructions

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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