REDOX Review 1

In which compound does carbon have an oxidation state of -4?

• CO

• CO₂

• CCl₄

• CH₄

If element X forms the oxides XO and X₂O₃, the oxidation numbers of element X are

• +1 and +2

• +2 and +3

• +1 and +3

• +2 and +4

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which polyatomic ion has a charge of 3-?

• chromate ion

• oxalate ion

• phosphate ion

• thiocyanate ion

What is the oxidation number of sulfur in the compound Na₂S₂O₃?

• -2

• +2

• +6

• +4

• gains protons

• is reduced

• loses electrons

• is oxidized

Tags

NGSS.HS-PS1-7

Match the chlorine in each compound to its oxidation state.

• +5

• KClO₂

• +3

• KClO₃

• +1

• KClO₄

• +7

• KClO

Which half-reaction correctly represents reduction?

Tags

NGSS.HS-PS1-2

In a redox reaction, the reducing agent will

• lose an electron and be reduced

• lose an electron and be oxidized

• gain an electron and be reduced

• gain an electron and be oxidized

• oxidizing agent and is reduced

• oxidizing agent and is oxidized

• reducing agent and is reduced

• reducing agent and is oxidized