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Voltaic Cells (Batteries)

Total questions: 25

Worksheet time: 50mins

Name
Class
Date
1.
The electrode at which reduction occurs
a)
cathode
b)
anode
c)
salt bridge
d)
electrode
2.
What reaction occurs at the anode?
a)
Ag+ + e- →Ag
b)
Ag → Ag+ + e-
c)
Ni2+ + 2e- → Ni
d)
Ni → Ni2+ + 2e-
3.
Which direction do the electrons flow in wire X and which metal is oxidized?
a)
A
b)
B
c)
C
d)
D
4.
Which statement is correct when the cell produces electricity?
a)
Magnesium atoms lose electrons
b)
Mass of the iron electrode decreases.
c)
Electrons flow from the iron half-cell to the magnesium half-cell.
d)
Negative ion flow from magnesium half-cell to iron half-cell
5.
Metal A is more reactive than metal B. Which statement is correct?
a)
Electrons flow in the external circuit from A to B
b)
Positive ions flow through salt bridge from A to B
c)
Positive ions flow in external circuit from B to A.
d)
Electrons flow through salt bridge from B to A
6.
What is the function of Y in cell below?
a)
To complete the circuit
b)
To allow flow of electrons between both cells
c)
To allow flow of ions 
d)
To connect both half cells
7.
Oxidation happens at the
a)
anode
b)
cathode
c)
salt bridge
d)
voltmeter
8.
Reactions in voltaic cells are
a)
spontaneous, redox reactions
b)
non-spontaneous, redox reactions
c)
spontaneous, non-redox reactions
d)
non-spontaneous, non-redox reactions
9.
This electrode in a voltaic cell gains mass
a)
anode
b)
cathode
10.
In which direction does electricity flow in a voltaic cell (battery)?
a)
Electrons flow from the cathode to the anode
b)
Electrons flow from left to right
c)
Electrons flow from anode to cathode
d)
Electrons flow from right to left
11.
a)

a

b)

b

c)

c

d)

d

12.
a)

a

b)

b

c)

c

d)

d

13.
a)

a

b)

b

c)

c

d)

d

14.
a)

a

b)

b

c)

c

d)

d

15.
a)

a

b)

b

c)

c

d)

d

16.

The energy change in voltaic cell is ______________.

a)

kinetic energy --> electrical energy

b)

electrical energy --> chemical energy

c)

chemical energy --> electrical energy

d)

electrical energy --> kinetic energy

17.

The overall reaction in an electrochemical cell is

Zn(s) + Cu2+(aq) → Zn2+(aq) + Cu(s)

As the reaction in this cell takes place, the

a)

mass of the Zn(s) electrode decreases

b)

Zn2+(aq) concentration remains the same

c)

mass of the Cu(s) electrode decreases

d)

Cu2+(aq) concentration remains the same

18.
If in a reaction, copper is reduced; its number of electrons has:
a)
Increased
b)
Decreased
c)
Remained Constant
d)
Varies Randomly
19.

In a Galvanic cell, the electrons flow from the...

a)

anode to the cathode

b)

cathode to the anode

20.

In a redox reaction, the oxidising agent... (choose two options)

a)

is oxidised

b)

is reduced

c)

increases its oxidation number

d)

decreases its oxidation number

21.
Consider the galvanic cell given.
Which of the following deductions about this cell is correct?
a)
Oxidation is occurring in half-cell 2
b)
The positive electrode is in half-cell 2
c)
Oxidation is occurring in half-cell 1
d)
The negative electrode is in half-cell 1
22.
Atoms of which element can most easily be oxidized?
a)
Copper
b)
Zinc
c)
Iron
d)
Calcium
23.

In a Galvanic Cell, the anode is...

a)

positive

b)

negative

24.
Which of the following reactions is balanced by both mass and charge?
a)
Fe+2 + Al →Fe + Al+3
b)
Cu + Fe+2 → Cu+1 + Fe+3
c)
F2 + Br- --> F- + Br2
d)
Fe+2 + 2 Cu --> 2 Cu+ + Fe
25.
Which of the following is the balanced half -reaction for the oxidation of Cu to Cu+2?
a)
Cu   --> Cu+2
b)
Cu + 2 e-   --> Cu+2
c)
Cu  --> Cu+2  + 2 e-
d)
Cu - 2e-  --> Cu+2

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