Redox Reaction Oxidation Number

Oxidation number of H in H₂:

• 0

• +1

• -1

• +2

What is oxidation number of Mn in MnO₂ ?

• 0
• +2
• -2
• +4

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Oxidation number of O in the ion H₃O⁺:

• 0

• -1

• -2

• +2

Tags

NGSS.HS-PS1-2

Oxidation number of Fe in Fe₂O₃:

• 0

• -2

• +2

• +3

Oxidation number of S in S₈:

• 0

• -2

• +4

• +6

What is the oxidation number of chlorine in KClO₃?

• -1

• +5

• +3

• +1

NH₄⁺

• -3

• +3

• +5

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

In the reaction 2Ca(s) + O₂(g) --> 2CaO(s), calcium is __________

• reduced

• oxidized

• electrolyzed

• synthesized

Oxidation is the loss of electron, meaning, there is an increase of oxidation number

• True

• False

The species that loses electron is _____ and usually _____ agent.

• oxidized; reducing

• Reduced; oxidising

• Oxidized; oxidising

• Reduced; reducing