Electrochemistry
Authored by MOHAMAD YEOP
Chemistry
University
Used 37+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Which of the following statements is FALSE about electrolysis?
nonspontaneous reaction
chemical reaction to electrical
Electrical energy is used
electrical to chemical reaction
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
The half-reaction that occurs at the anode during the electrolysis of molten sodium bromide is?
2 Br----> Br2 + 2 e-
Br2 + 2 e- ---> 2 Br-
Na+ + e- ---> Na
Na ---> Na+ + e-
3.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
In an electrolytic cell the electrode at which the electrons enter the solution is called the ______ ; the chemical change that occurs at this electrode is called _______.
anode, oxidation
anode, reduction
cathode, oxidation
cathode, reduction
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which is TRUE?
I=Q X T
T=Q X I
Q= I X T
None
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
In voltaic cells, the salt bridge is important to_______ .
is not necessary in order for the cell to work
acts as a mechanism to allow mechanical mixing of the solutions
allows charge balance to be maintained in the cell
drives free electrons from one half-cell to the other
6.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Which of the following statements is(are) true for all voltaic (or galvanic) cells?
(I) Reduction occurs at the cathode
(II) The anode gains mass during discharge (note: this means operation of the cell.)
(III) The voltage is less than or equal to zero.
only III
II and III
only II
only I
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the standard notation for a voltaic cell, the double vertical line "||" represents
a salt bridge
gas electrode
a wire (metal) connection
a phase boundary
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