NCEA Chemistry 2.7 Oxidation States Revision

State the oxidation number of the underlined element in this compound.

HCl

• +1

• +2

• -1

• -2

State the oxidation number of the underlined element in this compound.

CO₂

• +1

• +2

• +3

• +4

State the oxidation number of the underlined element in this compound.

SO₃^2-

• +1

• +2

• +3

• +4

State the oxidation number of the underlined element in this compound.

CO

• +1

• +2

• +3

• +4

State the oxidation number of the underlined element in this compound.

KI

• +1

• +2

• -1

• -2

State the oxidation number of the underlined element in this compound.

H₂O₂

• +1

• +2

• -1

• -2

State the oxidation number of the underlined element in this compound.

Cr(NO₃)₃

• +1

• +2

• +3

• +4

State the oxidation number of the underlined element in this compound.

Br₂

• +1

• +2

• +3

• 0

State the oxidation number of the underlined element in this compound.

H₂SO₄

• -6

• +2

• +3

• +6

State the oxidation number of the underlined element in this compound.

FeSO₄

• +1

• +2

• +3

• +4