
Gas Chemistry
Authored by Rosemary Matthews
Chemistry
4th Grade

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15 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the approximate percentage of nitrogen in the Earth's atmosphere?
21%
78%
1%
0.04%
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which gas in the atmosphere is known for its strong triple covalent bond, making it unreactive?
Oxygen
Carbon dioxide
Nitrogen
Argon
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the main use of nitrogen in food packaging?
To add flavour
To prevent spoilage
To increase weight
To add colour
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the test for ammonia gas?
It turns limewater milky
It forms white smoke with concentrated hydrochloric acid
It burns with a blue flame
It changes litmus paper to red
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which metal is commonly used in the laboratory preparation of hydrogen gas?
Copper
Zinc
Iron
Magnesium
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the main use of hydrogen in weather balloons?
To provide weight
To act as a coolant
To lift the balloon
To add colour
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How is oxygen gas commonly prepared in the laboratory?
By heating calcium carbonate
By the catalytic decomposition of hydrogen peroxide
By reacting zinc with hydrochloric acid
By burning magnesium
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