Redox Reactions

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What type of redox reaction involves the transfer of electrons between two substances in the same vessel?

Indirect redox reaction

Electrochemical reaction

Direct redox reaction (correct)

Intermolecular redox reaction

What is the term for a reaction in which oxidation and reduction take place simultaneously?

Redox reaction (correct)

Electrolysis

Electrochemical reaction

Corrosion reaction

What type of compounds contain an element in a lower oxidation state?

Covalent compounds

Ionic compounds

Ous compounds (correct)

Organic compounds

What is the term for the decrease in oxidation number of an element?

Reduction Signup and view all the answers

What is the strongest reducing agent in solution?

Lithium Signup and view all the answers

What is the oxidation state of sulfur in Na2SO3?

+2 Signup and view all the answers

What is the purpose of starch solution in the evolution of iodine from KI solution in the presence of turpentine?

To detect the presence of iodine Signup and view all the answers

What is the phenomenon where Na2SO3 solution is oxidized by air in the presence of Na3AsO3 solution?

Induced oxidation Signup and view all the answers

What is the oxidation state of chlorine in KClO3?

+7 Signup and view all the answers

What happens to the oxidation state of an element when it acts as an oxidizing agent?

It decreases Signup and view all the answers

What is the result of the reduction of CuO with carbon?

Cu + CO Signup and view all the answers

What is the oxidation number of iron in the reaction Fe + S → FeS?

0 Signup and view all the answers

What type of reaction involves the addition of hydrogen?

Reduction Signup and view all the answers

What is the result of the reaction MnO2 + 4H+ + 4Cl- → MnCl2 + 2H2O + Cl2?

Oxidation of Mn Signup and view all the answers

What type of agent is fluorine?

Oxidising agent Signup and view all the answers

What is the oxidation state of sulfur in the reaction H2S + Cl2 → 2HCl + S?

0 Signup and view all the answers

Which ions are not included in the final balanced ionic equation?

Spectator ions Signup and view all the answers

What is the term for the reaction in which one substance loses electrons and another substance gains electrons?

Redox reaction Signup and view all the answers

What is the purpose of writing ionic equations?

To simplify the representation of the reaction Signup and view all the answers

What is the oxidation state of an element that acts as a reducing agent?

Decreases Signup and view all the answers

What is the oxidation state of iron in the complex [Fe(CN)6]3-?

+3 Signup and view all the answers

Which of the following reactions is an example of indirect redox reaction?

FeCl2 + Cu → Fe + CuCl2 Signup and view all the answers

What is the first step in the ion-electron method for balancing redox reactions?

Write down the redox reaction in ionic form Signup and view all the answers

What is the change in oxidation number of magnesium in the reaction Mg2+ → Mg0?

Decrease by 2 Signup and view all the answers

What is the role of the activator in autoxidation?

To combine with oxygen to form an addition compound Signup and view all the answers

What is the process by which [Fe(CN)6]3- is reduced to [Fe(CN)6]4-?

Electronation Signup and view all the answers

What is the purpose of dividing the half reaction by 2, 3, etc. in the ion-electron method?

To balance the number of atoms of each element Signup and view all the answers

What is the direction of electron transfer in the reaction [Fe(CN)6]3- + e- → [Fe(CN)6]4-?

From e- to [Fe(CN)6]4- Signup and view all the answers

What is the result of the autoxidation of water in the presence of an activator?

Formation of hydrogen peroxide Signup and view all the answers

What is the term for the phenomenon where a substance absorbs oxygen from the air in the presence of water?

Autoxidation Signup and view all the answers