What indicates that the black storage column contains hydrogen?

Electrolysis and Gas Tests

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Chemistry, Science, Physics
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9th - 10th Grade
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Hard

Patricia Brown
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
It is connected to the cathode.
It has fewer bubbles than the red column.
It has more bubbles than the red column.
It is connected to the anode.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the ratio of hydrogen to oxygen molecules produced in water decomposition?
1:1
1:2
3:1
2:1
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Where does the net reaction of water decomposition occur in the electrolyzer?
Only at the anode
In the electrolyte
Only at the cathode
At both the anode and cathode
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens to electrons at the cathode?
They remain unchanged.
They are lost to the electrolyte.
They combine with water molecules.
They are gained by the anode.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which product is formed at the anode during electrolysis?
Hydrogen
Oxygen
Water
Hydroxide ions
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What sound is expected when hydrogen is ignited in a test tube?
A crackle
A hiss
A pop
A whistle
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is hydrogen considered less dense than air?
It is denser than oxygen.
It is heavier than air.
It is lighter than air.
It has the same density as air.
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