1.
Which of the following metals is oxidized by calcium ions?
*potassium
zinc
iron
lead
2.
The first electrochemical cell was invented by ____.
Michael Faraday
*Alessandro Volta
James Maxwell
Benjamin Franklin
3.
Why can't a lead storage battery be recharged indefinitely?
A direct current must pass through the cells.
The electrodes lose lead sulfate.
*It is difficult to reverse the direction of current flow.
The electrolyte is too expensive.
4.
Which electrode (anode or cathode) is designated as positive in an electrolytic cell?
anode
*cathode
both
neither
5.
What is the direction of electron flow in an electrolytic cell?
from cathode to anode
*from anode to cathode
in either direction
There is no flow.
6.
What electrolyte can be used to electrolyze water?
hydrochloric acid only
sodium chloride only
sodium hydroxide only
*any electrolyte that is not easily reduced or oxidized
7.
The gas produced at the cathode in the electrolysis of brine is ____.
*hydroxide
chlorines
oxygen
hydrogen
8.
In electroplating, the object to be electroplated is placed _____.
*at the anode
at the cathode
at either the anode or the cathode
in between the anode and the cathode
Thank You.
A
B
B
A
B
D
D
B
^^ these are all correct, just took the quiz!
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THESE ARE MOSTLY WRONG DO NOT USE BIG WRONG ANSWERS ME FAIL TEST :((((((((((((((
1. Which of the following metals is oxidied by calcium ions? - Potassium
2. The first electrochemical cell was invented by ____. - Alessandro Volta
3. Why can't a lead storage battery be recharged indefinitely? - The electrodes lose lead sulfate.
4. Which electrode (anode or cathode) is designated as positive in an electrolytic cell? - anod
5. What is the direction of electron flow in an electrolytic cell? - from anode to cathod
6. What electrolyte can be used to electrolyze water? - any electrolyte that is not easily reduced or oxidize
7. The gas produced at the cathode in the electrolysis of brine is ____. - hydroge
8. . In electroplating, the object to be electroplated is placed _____. - at the catho
100% right
Dang it i failed. Why did you post this? YOUTE NOT HELPING ANYONE
These are correct btw
unknown answers are correct.
A
B
B
A
B
D
D
B
Still correct for 2019 :)
A
B
B
A
B
D
D
B
All correct, connexus Chemistry B 2019