Quiz | Oxidation-Reduction Reactions

1

What kind of reactions is Cu2+ (aq) + 2 e- → Cu (s) ?

Oxidation-Reduction reaction

Oxidation reaction

Reduction reaction

Galvanization reaction

2

What is an oxidation reaction?

The loss of electrons and a decrease in oxidation state

The loss of electrons and an increase in oxidation state

The gain of electrons and an increase in oxidation state

The gain of electrons and a decrease in oxidation state

3

What is the oxidation number of the carbon atom in H2CO3?

0

+2

+4

+8

4

What is the oxidation number of chromium atom in Cr2O72-?

+4

+6

+8

+12

5

What is the reducing agent in the reaction: Fe2O3 + 3 CO → 2 Fe + 3 CO2?

Fe2O3

CO

Fe

CO2

6

What is the reduced species in the reaction: O2 + 6 I- + 2 H2O à 2 I3- + 4 OH-?

O2

I-

H2O

OH-