Free Printable Quiz on Redox

Worksheets

Quiz on Redox

Total questions: 10

Worksheet time: 11mins

Name

Class

Date

Oxidation is the _________ of electrons.

loss

gain

sharing

transfer

Reduction is the ___________ of electrons.

loss

gain

sharing

transfer

Which statement is true:
Mg → Mg²⁺ + 2e^–

Mg gains 2 electrons

Mg_²⁺ loses 2 electrons

Mg loses 1 electron

Mg loses 2 electrons

Which of the following half reactions correctly represents a reduction half reaction?

Fe →Fe²⁺+ 2e^-

Pb⁴⁺ + 2e^- →Pb²⁺

2O^-2→O₂ + 4e^-

Fe + 3e^- →Fe³⁺

From the listed standard electrode potentials, what is E^o for the cell:

Mg (s) | Mg2+ (aq) ||Sn2+ (aq) | Sn (s)

Mg²⁺ (aq) + 2 e- ---> Mg (s) E^o = -2.363 V

Sn²⁺ (aq) + 2 e- Sn (s) ---> E^o = -0.136 V

a) +2.499

b) +2.227

c) +1.113

d) -2.227

e) -2.499

+2.499

+2.227

+1.113

-2.227

-2.499

The Eo at 25 Co for the following reaction is 0.47 V.

Calculate the $\Delta$ oG in kJ.

Pb (s) + Cu2+ (aq)---> Pb2+ (aq) + Cu (s)

a) -45

b) +105

c) +91

d) -105

e) -91

Which of the following statements is true?

I. Oxidation occurs at the anode of a voltaic cell.

II. The potential of a cell depends on temperature.

III. Spontaneous oxidation-reduction reactions have E^o < 0.

a) II & III

b) I & II

c) III

d) I

e) II

In the reaction Zn + H₂O --> ZnO₂ + H₂
which element, if any, is oxidized?

Zinc

Hydrogen

Oxygen

None

If in a reaction, copper is reduced; its number of electrons has:

Increased

Decreased

Remained Constant

Varies Randomly

10.