Unit Five Self-Assessment Questions.docx

A zn mno 2 b zn c c c zn d c mno 2 4 in an

Info icon This preview shows pages 6–9. Sign up to view the full content.

View Full Document Right Arrow Icon
a. Zn, MnO 2 b. Zn, C c. C, Zn d. C, MnO 2 4) In an electrochemical cell composed of two half-cells, ions flow from one half-cell to another through a. Electrodes b. Air c. A salt bridge d. A wire 5) For the following reaction, the oxidation half-reaction is Mg + CuO MgO + Cu a. Cu 2+ + 2 e - CuO b. CuO + Cu 2+ + 2 e -
Image of page 6

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Unit Five Test on March 31, 2017 c. Mg 2+ + 2 e - MgO d. Mg Mg 2+ + 2 e - 6) In a lead-storage battery, the product of both cathode and anode reactions is a. H 2 SO 4 b. Pb c. PbO 2 d. PbSO 4 7) Which statement is not true in regards to lithium batteries? a. Are low density b. Are used in laptop computers c. Provide high voltage d. Are nonrechargeable 8) The overall electricity-producing reaction in the H 2 /O 2 fuel cell is 2 H 2 (g) + O 2 (g) 2 H 2 O (g) The half-reaction at the cathode is a. H 2 2 H + + 2 e - b. 2 H + + 2 e - H 2 c. O 2 + 4 H + + 4 e - 2 H 2 O d. 2 H 2 O O 2 + 4 H + + 4 e - Section Four 1) When iron rusts, it is being a. Converted to gold b. Oxidized c. Reduced d. Neutralized 2) Corrosion of aluminum is not as big a problem as corrosion of iron because aluminum a. Forms an oxide layer that adheres to the metal’s surface b. Is less reactive than Fe c. Needs water to corrode d. Has a higher oxidation number 3) When silver is tarnished by H 2 S, hydrogen is a. Reduced b. dissolved c. oxidized d. evaporated 4) In a typical explosive reaction, which of the following usually occurs? a. Gases are converted from one form to another b. Liquids or solids are converted into aqueous solutions c. Liquids or solids are converted to gases d. Nitrogen nuclei are split 5) Black powder is a mixture of charcoal (carbon), potassium nitrate, and sulfur. The oxidizing agent in black powder is a. Charcoal b. Nitroglycerin c. Potassium nitrate d. Sulfur Section Five 1) When CH 4 is burned in plentiful air, the products are a. C + H 2 b. CH 2 + H 2 O c. CO 2 + H 2 d. CO 2 + H 2 O 2) When sulfur burns in plentiful air, the product is a. CO 2 b. H 2 S c. H 2 SO 4 d. SO 2 3) Which of the following is a common oxidizing agent?
Image of page 7
Unit Five Test on March 31, 2017 a. HCl b. H 2 O 2 c. NaOH d. NaCl 4) Which of the following is a common oxidizing agent? a. Cl 2 b. H 2 c. HCl d. KOH 5) The main active ingredient in common household bleach, often called chlorine bleach , is a. HCl b. NaOCl c. NaOH d. NaCl 6) Bleach for hair usually contains a. Ammonia b. Hydrochloric acid c. Hydrogen peroxide d. Sodium hypochlorite 7) Many disinfectants are a. Oxidizing agents b. Reducing agents c. Strong acids d. Strong bases 8) Potassium permanganate is a powerful oxidizing agent. In acidic solutions, the permanganate ion turns into Mn 2+ cation, while in basic solution, it becomes a solid MnO 2 . How many electrons are involved in these processes, respectively? a. 6, 2 b. 6, 3 c. 4, 5 d. 5, 3 Section Six 1) Which of the following is a common reducing agent?
Image of page 8

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 9
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern