Worksheets10.1 Galvanic Cell - A
Total questions: 17
Worksheet time: 1hrs 25mins
Which energy conversion shown below takes place in a galvanic cell?
Electrical to chemical
Mechanical to chemical
Mechanical to electrical
Chemical to electrical
In a voltaic cell, the salt bridge is necessary for
the movement of electrons to create a current
the movement of ions to create a current
the movement of electrons and maintain the electrical neutrality of solution
the movement of ions and maintain the electrical neutrality of solution
In a Galvanic Cell, the anode is the (a) terminal.
Oxidation occurs at the...
anode
cathode
In the above Galvanic Cell, which half cell is undergoing reduction?
Cu | Cu2+
Zn | Zn2+
In a redox reaction, the reducing agent... (choose two options)
is oxidised
is reduced
increases its oxidation number
decreases its oxidation number
If an electrochemical reaction is spontaneous, what will Ecell be?
positive
negative
What is the standard electrode which all other standard electrode potentials are measured against?
helium
hydrogen
magnesium
potassium
Ecell = Ecathode - Eanode. Is this equation true or false?
True
False
If the cell potential, Ecell is negative, the reaction is?
a success
spontaneous
not spontaneous
exothermic
Metal A is more reactive than metal B. Which statement is correct?
Electrons flow in the external circuit from A to B
Positive ions flow through salt bridge from A to B
Positive ions flow in external circuit from B to A.
Electrons flow through salt bridge from B to A
Which changes could take place at positive electrode in a voltaic cell?
I and II
I and III
II and III
I, II and III
Below shows a cell diagram for voltaic cell. Which of the following is FALSE?
Electrons flow from anode to cathode
Oxidation happens in anode
Copper undergo reduction to form copper ions
Zinc undergo oxidation to form Zinc ions
Which half-reaction correctly represents reduction?
Ag → Ag+ + e-
F2 → 2F- + 2e-
Au3+ + 3e- → Au
Fe2+ + e- → Fe3+
What reaction occurs at the anode?
Ag+ + e- →Ag
Ag → Ag+ + e-
Ni2+ + 2e- → Ni
Ni → Ni2+ + 2e-
Given the cell notation
Cu(s)|Cu2+(aq) || Ag+(aq)|Ag(s)
what is the half-reaction that occurs at the anode ?
Cu2+(aq) + 2e– ⟶ Cu(s)
Cu(s) ⟶ Cu2+(aq) + 2e–
Ag+(aq) + e– ⟶ Ag(s)
2Ag+(aq) + Cu(s)⟶ Cu2+(aq) + 2Ag (s)
An electrochemical cell reacts according to the following equation:
Br2 + Zn → 2Br- +Zn2+
What is its cell notation?
Br- | Br2 || Zn | Zn2+
Zn | Zn2+ || Br- | Br2
Zn2+ | Zn || Br2 | Br-
Br- | Zn2+ || Zn | Br2
