Oxidation State

The oxidation state of hydrogen in its compounds is usually ​ (a)   , except in metal hydrides where it is ​ (b)   .

The oxidation state of oxygen in its compounds is usually ​ (c)   , except in peroxides where it is ​ (d)   .

• +1

• -1

• -2

• 0

• +2

• +3

• -3

What is the oxidation state of copper in CuO?

• +1

• -1

• +2

• -2

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

• +2

• -2

• +3

• -3

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

• +2

• -2

• 2+

• 0

• -2

• +4

• +6

• +8

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

If the oxidation state of an element in a substance ​increases during the reaction, the substance is ​​ (a)   .

If the oxidation state of an element in a substance decreases during the reaction, the substance is ​ (b)   .

• oxidised

• reduced

Match the following substances containing chlorine to the correct oxidation state of chlorine.

• +4

• 0

• +1

• +7

• -1

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Nitrogen forms a variety of compounds. List the following compounds in order of increasing oxidation states of nitrogen.

• -1

• +1

• 0

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

• +3

• 0

• -3

• 3-