Practice Electrochemistry Multiple Choice Questions with Answers Quiz-1

Q.1.

What is an anode?

It is the electrode where oxidation takes place.
It is the electrode where reduction takes place.
It is an aqueous solution containing an electrode.
It is the salt bridge that connects half-cells.

Q.2.

What is an oxidizing agent?

It is the species that gets reduced -- gains electrons.
It is the species that gets oxidized -- loses electrons.
It is the species that creates electrons.
It is the species that loses electrons.

Q.3.

What is a galvanic (voltaic) cell?

It is a cell that destroys electrons on one side and creates electrons on the other side.
It is a cell that contains only one metal bar and one aqueous ion solution.
It is a type of battery that drives a redox reaction when electricity is applied.
It is a type of battery that generates an electrical current from redox reactions.

Q.4.

What is a standard half-cell?

It is one cell that comprises half of a whole battery.
It is a cell containing only a metal bar with no aqueous ion solution.
It is a cell containing only an aqueous ion solution and no metal bar.
It is a cell that generates half of a volt of electricity.

Q.5.

In a Galvanic Cell, the anode is...

positive
negative

Q.6.

A certain galvanic cell has for its spontaneous cell reaction: Zn + HgO → ZnO + HgWhich is the half-reaction occurring at the anode?

HgO + 2 e- → Hg + O2-
Zn2+ + 2 e- → Zn
Zn → Zn2+ + 2 e-
ZnO + 2 e- → Zn

Q.7.

Rate the Session Today

1
2
3
4
All of above

Q.8.

Calculate the standard cell potential.3Mg + 2Al--> 2Al + 3Mg2+

+0.71 V
-0.71 V

Q.9.

What occurs to the mass of copper electrode in the following reaction?Zn/Zn// Cu2+/Cu

increases
decreases
remains the same

Q.10.

If Al is above Co in the activity series of metals, which of the following will occur if Al metal is put into a solution of cobalt nitrate?

a redox reaction takes place
the Al strip dissolves
the Al strip becomes coated with cobalt
all of the above

Q.11.

An iron nail is put into a solution of copper nitrate, iron is above copper in the activity series of metals, what will happen?

iron will be reduced
bubbles of oxygen gas will form on iron nail
the iron nail will become copper plated
no reaction occurs

Q.12.

Which metal is the negative electrode?Zn/Zn// Cu2+/Cu

zinc
copper

Q.13.

What would be the theoretical cell potential of the previous electrochemical cell?Ag+/Ag = 0.80VNi2+/Ni = -0.25V

1.05V
-1.05V
0.55V
-0.55V

Q.14.

Electrons are gained at the

anode
cathode

Q.15.

Oxidation occurs at the

anode
cathode

Q.16.

Electrons always flow from

cathode to anode
anode to cathode

Q.17.

What is a cathode?

It is the electrode where oxidation takes place.
It is the electrode where reduction takes place.
It is an aqueous solution containing an electrode.
It is the salt bridge that connects half-cells.

Q.18.

What is a half-reaction?

It is a reaction at equilibrium where half of the substances are reactants and half of the substances are products.
It is the reaction that occurs when the switch of a galvanic cell is open.
It shows EITHER the reduction component or the oxidation component of a redox reaction.
It shows BOTH the reduction and oxidation components of a redox reaction.

Q.19.

What is a redox reaction?

A reaction where both reactants get reduced.
A reaction where both reactants get oxidized.
A reaction that involves a transfer of electrons between reactants.
A reaction that involves the combustion of at least one reactant.

Q.20.

What is a reducing agent?

It is the species that gets reduced -- gains electrons.
It is the species that gets oxidized -- loses electrons.
It is the species that creates electrons.
It is the species that destroys electrons.

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