Oxidation-Reduction

If oxidation happened, then...

• something gained electrons

• reduction also happened

• flames are always involved

• oxygen is always involved

Tags

NGSS.HS-PS1-7

If an atom lost electrons, it...

• was burned

• was reduced

• was oxidized

• it became negative

Of the 5 types of reactions, which one(s) are oxidation-reduction?

• all of them

• only double replacement

• double replacement and combustion

• all of them except double replacement

Which of the following is NOT an example of an oxidation reduction reaction?

• metal rusting

• acid neutralizing base

• burning methane

• photosynthesis

Which of the following has an oxidation number of zero on the chlorine atom?

• NaCl

• Cl₂

• Cl^-

• ClO₃^-

What is the oxidation number on the nitrogen in NO?

• 0

• -1

• -2

• +2

Tags

NGSS.HS-PS1-2

What is the oxidation number on the nitrogen in Mg₃N₂?

• 0

• -2

• -3

• +3

What is the oxidation number on the nitrogen in NO₂^-?

• -1

• +3

• -3

• +4

An element's oxidation numbers remain the same during a reaction. What happened to that element?

• It was oxidized

• It was reduced

• It was both oxidized and reduced

• It was neither oxidized nor reduced

An element's oxidation numbers changed from zero to +2 during a reaction. What happened to that element?

• It was oxidized

• It was reduced

• It was both oxidized and reduced

• It was neither oxidized nor reduced