Docsity
Docsity
Prepare for your exams
Prepare for your exams

Study with the several resources on Docsity

Earn points to download
Earn points to download

Earn points by helping other students or get them with a premium plan

Guidelines and tips
Guidelines and tips
Sell on Docsity
Sell on Docsity
Docsity AI
Docsity AI
Log inSign up

Prepare for your exams

Study with the several resources on Docsity

Find documents

Prepare for your exams with the study notes shared by other students like you on Docsity

Search for your university

Find the specific documents for your university's exams

Docsity AINEW

Summarize your documents, ask them questions, convert them into quizzes and concept maps

Explore questions

Clear up your doubts by reading the answers to questions asked by your fellow students

Earn points to download

Earn points by helping other students or get them with a premium plan

Share documents
download point icon20 Points

For each uploaded document

Answer questions
download point icon5 Points

For each given answer (max 1 per day)

All the ways to get free points
Get points immediately

Choose a premium plan with all the points you need

Study Opportunities

Choose your next study program

Get in touch with the best universities in the world. Search through thousands of universities and official partners

Community

Ask the community

Ask the community for help and clear up your study doubts

Free resources

Our save-the-student-ebooks!

Download our free guides on studying techniques, anxiety management strategies, and thesis advice from Docsity tutors

Redox Quiz Practice: Identifying Oxidation and Reduction Reactions, Quizzes of Chemistry

University of Houston (UH)Chemistry

A practice quiz on redox reactions, covering topics such as oxidation numbers, balancing redox reactions using half reactions, standard reduction potential, spontaneity of redox reactions based on eo, and voltaic cells. Students will be tested on their understanding of oxidizing and reducing agents, as well as their ability to identify which elements are oxidized or reduced in various reactions.

Typology: Quizzes

2018/2019

Uploaded on 02/11/2022

snehaaaa
snehaaaa ๐Ÿ‡บ๐Ÿ‡ธ

4.7

(19)

239 documents

1 / 2

Toggle sidebar

This page cannot be seen from the preview

Don't miss anything!

bg1
Practice Quiz for Redox
Topics Covered
Oxidation Reduction
Oxidation Numbers
Balancing Redox Reactions Using Half Rxn
Method
Standard Reduction Potential
Spontaneity of Redox Reactions based
on Eo
Voltaic Cells
Oxidizing Agents and Reducing
Agents
1. Consider the following reaction: Ba(s) + F2(g) -------> BaF2.
Which of the following statements is true?
a. The barium atom is gaining electrons; therefore, it is oxidized.
b. The fluorine atom is gaining electrons; therefore, it is oxidized.
c. The barium atom is losing electrons; therefore, it is oxidized.
d. The fluorine atom is losing electrons; therefore, it is reduced.
e. None of these
2. In the reaction 2Ca(s) + O2(g) ------> 2CaO(s), calcium is __________
a. reduced b. electrolyzed c. synthesized d. oxidized e. none of these
3. The oxidation state of selenium in NaSeO3 is
a. +7 b. +5 c. +3 d. โ€“3 e. โ€“5
4. In which of the following compounds does nitrogen have the most positive oxidation state?
a. HNO3 b. NH4Cl c. N2O d. NO2 e. NaNO2
5. In the reaction SiO2(s) + 2C(s) -------> Si(s) + 2CO(g), which species is the oxidizing agent?
a. Si b. C c. O d. SiO2 e. CO
6. In the reaction N2(g) + 3H2(g) -------> 2NH3(g), nitrogen is __________.
a. oxidized b. reduced c. synthesized d. electrolyzed e. none of these
7. Which of the following reactions does not involve oxidation-reduction?
a. CH4 + 3O2 -----> 2H2O + CO4
b. Zn + 2HCl ------> ZnCl2 + H2
c. 2Na + 2H2O -------> 2NaOH + H2
d. MnO2 + 4HCl --------> Cl2 + 2H2O + MnCl2
e. All are oxidation-reduction reactions.
8. Which of the following statements is(are) true? Oxidation and reduction
a. Cannot occur independently of each other
b. Accompany all chemical changes
c. Describe the loss and gain of electron(s), respectively
d. Result in a change in the oxidation states of the species involved
e. A, C, and D are true
9. In the reaction Zn + H2SO4 --------> ZnSO4 + H2, which element, if any, is oxidized?
a. zinc b. hydrogen c. sulfur d. oxygen e. none is oxidized
The following questions refer to the unbalanced reaction below as it occurs in acidic solution:
____ Cr2O72-(aq) + ____ I-(aq) ------> ____ Cr3+(aq) + ____ I2(s)
pf2

Partial preview of the text

Download Redox Quiz Practice: Identifying Oxidation and Reduction Reactions and more Quizzes Chemistry in PDF only on Docsity!

Practice Quiz for Redox Topics Covered Oxidation Reduction Oxidation Numbers Balancing Redox Reactions Using Half Rxn Method Standard Reduction Potential Spontaneity of Redox Reactions based on Eo Voltaic Cells Oxidizing Agents and Reducing Agents

  1. Consider the following reaction: Ba(s) + F 2 (g) -------> BaF 2. Which of the following statements is true? a. The barium atom is gaining electrons; therefore, it is oxidized. b. The fluorine atom is gaining electrons; therefore, it is oxidized. c. The barium atom is losing electrons; therefore, it is oxidized. d. The fluorine atom is losing electrons; therefore, it is reduced. e. None of these
  2. In the reaction 2Ca(s) + O 2 (g) ------> 2CaO(s), calcium is __________ a. reduced b. electrolyzed c. synthesized d. oxidized e. none of these
  3. The oxidation state of selenium in NaSeO 3 is a. +7 b. +5 c. +3 d. โ€“ 3 e. โ€“ 5
  4. In which of the following compounds does nitrogen have the most positive oxidation state? a. HNO 3 b. NH 4 Cl c. N 2 O d. NO 2 e. NaNO 2
  5. In the reaction SiO 2 (s) + 2C(s) -------> Si(s) + 2CO(g), which species is the oxidizing agent? a. Si b. C c. O d. SiO 2 e. CO
  6. In the reaction N 2 (g) + 3H 2 (g) -------> 2NH 3 (g), nitrogen is __________. a. oxidized b. reduced c. synthesized d. electrolyzed e. none of these
  7. Which of the following reactions does not involve oxidation-reduction? a. CH 4 + 3O 2 -----> 2H 2 O + CO 4 b. Zn + 2HCl ------> ZnCl 2 + H 2 c. 2Na + 2H 2 O -------> 2NaOH + H 2 d. MnO 2 + 4HCl --------> Cl 2 + 2H 2 O + MnCl 2 e. All are oxidation-reduction reactions.
  8. Which of the following statements is(are) true? Oxidation and reduction a. Cannot occur independently of each other b. Accompany all chemical changes c. Describe the loss and gain of electron(s), respectively d. Result in a change in the oxidation states of the species involved e. A, C, and D are true
    1. In the reaction Zn + H 2 SO 4 --------> ZnSO 4 + H 2 , which element, if any, is oxidized? a. zinc b. hydrogen c. sulfur d. oxygen e. none is oxidized The following questions refer to the unbalanced reaction below as it occurs in acidic solution: ____ Cr 2 O 72 - (aq) + ____ I-(aq) ------> ____ Cr3+(aq) + ____ I 2 (s)
  1. Determine the coefficient for the iodide ions. a. 1 b. 2 c. 3 d. 6 e. 7
  2. Determine the coefficient for the Cr3+^ ions. a. 1 b. 2 c. 3 d. 6 e. 7
  3. Determine the coefficient for water in the balanced equation for the reaction. a. 1 b. 2 c. 3 d. 6 e. 7
  4. Balance the following half-reaction that occurs in acidic solution: MnO 4 - (aq) ----> Mn2+(aq)
  5. Balance the following reaction that takes place in acidic solution: I-(aq) + IO 3 - (aq) -----> I 3 - (aq)
  6. In the balanced equation for the following redox equation, the sum of the coefficients is ___ Fe3+^ + I-^ ----> Fe2+^ + I 2 a. 4 b. 5 c. 6 d. 7 e. 8
  7. When a metal corrodes, what is happening chemically? a. The metal atoms lose electrons. d. The metal is combining with nitrogen gas. b. The metal atoms gain electrons. e. None of these c. Electrons are not involved. Answer the following questions for a galvanic cell that employs the reaction 2Na(l) + S(l) -----> Na 2 S(s)
  8. What element is oxidized?
  9. What element is reduced?
  10. What element serves as the anode?
  11. What element serves as the cathode?
  12. A certain voltaic cell has for its cell reaction: Zn + HgO โ†” ZnO + Hg Which is the half-reaction occurring at the anode? a. HgO + 2e โ€“^ โ†” Hg + O^2 โ€“^ d. ZnO + 2e โ€“^ โ†” Zn b. Zn2+^ + 2e โ€“^ โ†” Zn e. ZnO + 2e โ€“^ โ†” Zn c. Zn โ†” Zn2+^ + 2e โ€“
  13. Calculate E (^) cell for the following reaction: 2Fe2+(aq) + Cd2+(aq) โ†” 2Fe3+(aq) + Cd(s) Answers to Practice Quiz
  14. C
  15. D
  16. B
  17. A
  18. D
  19. B
  20. E
  21. E
  22. A
  23. D
  24. B
  25. E
  26. MnO 4 - (aq) + 5e-^ + 8H+(aq) --------> Mn2+(aq) + 4H 2 O(l)
  27. 6H+(aq) + 8I-(aq) + IO 3 - (aq) ------> 3I 3 - (aq) + 3H 2 O(l)
  28. D
  29. A
  30. Na
  31. S
  32. Na
  33. S
  34. C
  35. โ€“ 1.17 V