CHEM 162 EXPERIMENT 2 ELECTROCHEMISTRY
CERTIFICATION EVALUATION TEST 2026 FULL
QUESTIONS AND CORRECT ANSWERS
ALREADY PASSED GRADED A+
◉ What happens to the mass number and the atomic number of an
element when it undergoes beta decay?
A) The mass number decreases by 4 and the atomic number
decreases by 2.
B) The mass number does not change and the atomic number
increases by 1.
C) The mass number increases by 2 and the atomic number
increases by 1.
D) The mass number does not change and the atomic number
decreases by 2.
E) Neither the mass number nor the atomic number change..
Answer: B
◉ The balanced half-reaction in which sulfate ion is reduced to
sulfite ion is a __________ process.
A) three-electron
B) six-electron
C) four-electron
,D) one-electron
E) two-electron. Answer: E
◉ What is the oxidation number of chromium in the dichromate ion?
A) +12
B) +7
C) +6
D) +14
E) +3. Answer: C
◉ The electrode at which oxidation occurs is called the
A) oxidizing agent
B) reducing agent
C) cathode
D) anode
E) voltaic cell. Answer: D
◉ What drives the turbine in a nuclear power plant?
A) steam
B) the control rods
, C) the primary coolant
D) the moderator
E) UF6 gas. Answer: A
◉ Cathodic protection of a metal pipe against corrosion usually
entails
A) coating the pipe with another metal whose standard reduction
potential is less negative than that of the pipe.
B) coating the pipe with a fluoropolymer to act as a source of
fluoride ion (since the latter is so hard to oxidize).
C) attaching a dry cell to reduce any metal ions which might be
formed.
D) attaching an active metal to make the pipe the cathode in an
electrochemical cell.
E) attaching an active metal to make the pipe the anode in an
electrochemical cell.. Answer: D
◉ What is required for a nuclear transmutation to occur?
A) very high temperature
B) gamma emission
C) spontaneous nuclear decay
CERTIFICATION EVALUATION TEST 2026 FULL
QUESTIONS AND CORRECT ANSWERS
ALREADY PASSED GRADED A+
◉ What happens to the mass number and the atomic number of an
element when it undergoes beta decay?
A) The mass number decreases by 4 and the atomic number
decreases by 2.
B) The mass number does not change and the atomic number
increases by 1.
C) The mass number increases by 2 and the atomic number
increases by 1.
D) The mass number does not change and the atomic number
decreases by 2.
E) Neither the mass number nor the atomic number change..
Answer: B
◉ The balanced half-reaction in which sulfate ion is reduced to
sulfite ion is a __________ process.
A) three-electron
B) six-electron
C) four-electron
,D) one-electron
E) two-electron. Answer: E
◉ What is the oxidation number of chromium in the dichromate ion?
A) +12
B) +7
C) +6
D) +14
E) +3. Answer: C
◉ The electrode at which oxidation occurs is called the
A) oxidizing agent
B) reducing agent
C) cathode
D) anode
E) voltaic cell. Answer: D
◉ What drives the turbine in a nuclear power plant?
A) steam
B) the control rods
, C) the primary coolant
D) the moderator
E) UF6 gas. Answer: A
◉ Cathodic protection of a metal pipe against corrosion usually
entails
A) coating the pipe with another metal whose standard reduction
potential is less negative than that of the pipe.
B) coating the pipe with a fluoropolymer to act as a source of
fluoride ion (since the latter is so hard to oxidize).
C) attaching a dry cell to reduce any metal ions which might be
formed.
D) attaching an active metal to make the pipe the cathode in an
electrochemical cell.
E) attaching an active metal to make the pipe the anode in an
electrochemical cell.. Answer: D
◉ What is required for a nuclear transmutation to occur?
A) very high temperature
B) gamma emission
C) spontaneous nuclear decay
