Identifying Oxidation and Reduction in Redox Reactions

What type of reaction is described when methane combusts with oxygen?

• Synthesis reaction

• Double displacement reaction

• Endothermic reaction

• Exothermic reaction

Which element is more electronegative, carbon or hydrogen?

• Hydrogen

• Carbon

• Cannot be determined

• Both are equally electronegative

What is the oxidation state of oxygen in molecular oxygen (O2)?

• -1

• 0

• -2

• +1

In carbon dioxide, what is the oxidation state of carbon?

• 0

• -4

• +2

• +4

What is the oxidation state of oxygen in water (H2O)?

• -2

• +1

• 0

• -1

Which element is oxidized in the reaction between methane and oxygen?

• Hydrogen

• Oxygen

• Carbon

• None of the above

What does the term 'oxidation' imply in a chemical reaction?

• Transfer of protons

• No change in electron count

• Gain of electrons

• Loss of electrons

Which element is reduced in the combustion of methane?

• Hydrogen

• Carbon

• Oxygen

• None

What is the overall process called when both oxidation and reduction occur?

• Single displacement

• Decomposition

• Synthesis

• Redox

How can you verify that the half reactions in a redox process are balanced?

• All of the above

• By comparing the electron count on both sides

• By adding the reactants and products

• By ensuring the total charge is zero