Oxidation Numbers & Redox

What is the oxidation number of chlorine in HClO?

• 0

• -1

• +1

• +5

Oxidation is the _________ of electrons.

• loss

• gain

• sharing

• transfer

Reduction is the ___________ of electrons.

• loss

• gain

• sharing

• transfer

What is the oxidation number of nitrogen in N₂?

• -3

• 0

• +4

• -1

The sum of the oxidation numbers in SCN^-1 is equal to

• 0

• -1

• +1

• +3

The sum of the oxidation numbers in Na₂CO₃ is equal to

• 0

• -2

• +1

• -1

What is the oxidation number of iodine in KIO₃?

• 0

• -1

• +5

• +1

Determine the oxidation number of chromate in CrO₄^2-.

• +6

• 0

• +2

• +3

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following represents an element that has been oxidized?

• C → CH₄

• Fe³⁺ → Fe²⁺

• Cl₂ → 2Cl^-

• Zn → ZnO

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following represents an element that is reduced?

• C →  CO
• N₂ →  NH₃
• Zn  →   Zn²⁺ 
• H₂ →  H₂O

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2