Want to see correct answers?
Login or join for free!
  Chemistry Worksheets
Looking for Chemistry worksheets?
Check out our pre-made Chemistry worksheets!
Share/Like This Page
Filter By Grade

Grade 10 Grade 11 Grade 12 College

Browse Questions

Oxidation-Reduction Reactions Questions - All Grades

You can create printable tests and worksheets from these Oxidation-Reduction Reactions questions! Select one or more questions using the checkboxes above each question. Then click the add selected questions to a test button before moving to another page.

Previous Page 1 of 3 Next
Grade 11 Oxidation-Reduction Reactions
A chemical reaction that involves the gaining of electrons by one of the atoms involved in the reaction between two chemicals.
  1. Oxidation
  2. Reduction
  3. Photosynthesis
  4. Chemosynthesis
Grade 10 Oxidation-Reduction Reactions
An oxidation-reduction reaction is also referred to as a redox reaction.
  1. True
  2. False
Grade 11 Oxidation-Reduction Reactions
What is the oxidation number of iron in iron (II) oxide?
  1. +2
  2. +3
  3. -2
  4. -3
Grade 11 Oxidation-Reduction Reactions
A chemical reaction that occurs in an atom or compound and results in the loss of one or more electrons.
  1. Freezing point
  2. Reduction
  3. Oxidation
  4. Reactant
Grade 11 Oxidation-Reduction Reactions
Consider the following redox reaction:

H2C2O4(aq)+MnO-4(aq)→CO2(g)+Mn2+(aq)

What is the reduction half reaction for this redox reaction?
  1. (Mn)7+(aq)→Mn2+(aq)
  2. H2C2O4(aq)→CO2(g)
  3. (MnO4)-(aq)+8H+(aq)→Mn2+(aq)+4H2O(l)
  4. H2C2O4(aq)→2CO2(g)+2H+(aq)
Grade 12 Oxidation-Reduction Reactions
The oxidation number of I in HOI is                .
  1. -1
  2. 0
  3. -2
  4. +1
Grade 10 Oxidation-Reduction Reactions
Calcium carbonate on heating gives                .
  1. CaO
  2. CO2
  3. O2
  4. Both A & B
Grade 12 Oxidation-Reduction Reactions
Based on the unbalanced reaction below,

CrO2-4(aq)→Cr(OH)-4(aq)

Chromium undergoes which of the following processes?
  1. an oxidation
  2. a redox reaction
  3. a reduction
  4. an electron transfer equation
Grade 11 Oxidation-Reduction Reactions
Which chemical equation shows a redox reaction?
  1. CH3COOH+NaOH→CH3COONa+H2O
  2. Cl-+Ag+→AgCl↓
  3. 5Fe2++MnO1-4+8H3O+⇒6Fe3++Mn2++12H2O
  4. HCl+NaOH→NaCl+H2O
Grade 11 Oxidation-Reduction Reactions
What represents the total oxidation state for an ionic compound?
  1. It equals the charge of the cation.
  2. It equals the charge of the anion.
  3. It is equivalent to the magnitude of the ion with the higher charge.
  4. It equals zero.
Grade 11 Oxidation-Reduction Reactions
What would the oxidation number of a xenon atom be, and what would this oxidation number suggest?
  1. Its oxidation number is 8, making it inert.
  2. Its oxidation number is 0, making it nonreactive.
  3. Its oxidation number is 7, making it reactive.
  4. Its oxidation number is 0, making it reactive.
Grade 11 Oxidation-Reduction Reactions
What is the oxidation number of chlorine in KClO4?
  1. +5
  2. +7
  3. -8
  4. +1
Grade 12 Oxidation-Reduction Reactions
Which of the following properties qualitatively describes the ability of an atom to attract electrons?
  1. Ionization potential
  2. Electron affinity
  3. Electronegativity
  4. Valence
Grade 10 Oxidation-Reduction Reactions
Which of the following always occurs in an oxidation-reduction reaction?
  1. a reactant loses a proton
  2. a reactant loses two neutrons
  3. a reactant gains sulfur
  4. a reactant gains protons and neutrons
  5. one reactant gains electrons, and the other reactant(s) lose an equal number of electrons
Grade 11 Oxidation-Reduction Reactions
What is the oxidation number of chromium in calcium chromate?
  1. +2
  2. -2
  3. -8
  4. +6
Grade 11 Oxidation-Reduction Reactions
Consider the following redox reaction:

CH4(g)+O2(g)→CO2(g)+2H2O(l)

What is the change in the oxidation number of carbon in this reaction?
  1. It increases from -4 to +4.
  2. It decreases from +4 to 0.
  3. It increases from +4 to -3.
  4. It decreases from +4 to -2.
Grade 11 Oxidation-Reduction Reactions
What is the oxidation state of the ammonium ion present in NH4Cl?
  1. +5
  2. +1
  3. -1
  4. -4
Grade 12 Oxidation-Reduction Reactions
The oxidation number of Cl in KClO3 is                .
  1. -1
  2. -5
  3. +1
  4. +5
Grade 11 Oxidation-Reduction Reactions
The oxidation number of carbon in NaCN is 2+.
  1. True
  2. False
Previous Page 1 of 3 Next