Oxidation numbers

In which substance does hydrogen have an oxidation number of zero?

• LiH

• H₂S

• H₂O

• H₂

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

An increase in oxidation number.

• more acidic

• less basic

• oxidation

• reduction

Tags

NGSS.HS-PS1-7

What is the oxidation state of Pb in PbO?

• +4

• +2

• 0

• -2

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

C in CO₃^2-?

• -4

• +2

• 0

• +4

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

In the reaction

4 NH₃ + 5 O₂ → 4 NO + 6 H₂O

the oxidation number of nitrogen changes from

• –2 to –3

• –2 to +3

• –3 to –2

• –3 to +2

Tags

NGSS.HS-PS1-2

What is the oxidation state of Cl in ClO^-?

• -1

• 0

• +1

• +2

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is oxidation number of Cr in Cr₂O₇^2-?

• -2

• +2

• +6

• +12

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Oxidation number of manganese in MnO₄^- ion is

• +5

• +6

• +7

• +8

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2