Welcome to your Grade 12 Chemistry chapter 2
After carefully reading the following 30 questions, choose the correct answer.
1.
How is reduction defined in terms of oxidation number?
2.
What is a "dead" battery according to the electrochemical principles?
3.
In an electrolytic cell, where does oxidation occur?
4.
What is the primary difference between a fuel cell and a battery?
5.
Which metal can act as a sacrificial anode to protect iron from corrosion?
6.
According to Faraday's law, how many moles of electrons are needed to reduce 1 mole of Al3+ ions?
7.
What are "spectator ions" in a redox reaction?
8.
In the corrosion of iron, what is the chemical formula for rust?
9.
Which of the following is a secondary (rechargeable) battery?
10.
What happens when electricity is supplied to a rechargeable battery?
11.
In the reaction Mg(s)+2H+(aq)→Mg2+(aq)+H2(g), which species is oxidized?
12.
Which factors increase the rate of iron corrosion?
13.
What type of cell uses electrical energy to drive a non-spontaneous reaction?
14.
During the electrolysis of molten CaCl2, what is produced at the anode?
15.
In a voltaic cell, electrons flow through the external circuit:
16.
Which of the following is a primary battery?
17.
A metal corrodes if it serves as what in the corrosion process?
18.
What defines the term "oxidation" in modern chemistry?
19.
What is the stoichiometry for the formation of 1 mole of chlorine gas (Cl2) at an anode?
20.
In the corrosion of iron, what is reduced at the cathodic region?
21.
Which method is used to balance redox equations by tracking electron transfer?
22.
What happens to the oxidation number of an element that is being oxidized?
23.
What is the sum of oxidation numbers in a neutral compound?
24.
In a lead-acid battery, what acts as the electrolyte?
25.
What is the voltage of a cell at equilibrium (ΔG=0)?
26.
What is the anodic reaction in the electrolysis of molten sodium chloride?
27.
Which of the following is NOT an application of electrolysis?
28.
What does the term "redox" stand for?
29.
Which electrode is considered the positive electrode in an electrolytic cell?
30.
What is the function of a salt bridge in a voltaic cell?
