Year 8 Chemistry Revision Quiz - Medium To Hard Questions
This is your description.
- 1.Identify the type of reaction: N2 + H2 -----> NH3
- A.
Combination
- B.
Precipitation
- C.
Decomposition
- D.
Combustion
- 2.Identify the type of reaction: H2O ---> 2H2 + O2
- A.
Combination
- B.
Precipitation
- C.
Decomposition
- D.
Combustion
- 3.Identify the type of reaction: AgCl + BaBr2 ----> AgBr + BaCl2
- A.
Combination
- B.
Precipitation
- C.
Decomposition
- D.
Combustion
- 4.This is a diagram of which element?
- A.
C
- B.
He
- C.
Na
- D.
Au
- 5.
![This is a diagram of which element? - ProProfs]( "This is a diagram of which element?")
This is a diagram of which element?- A.
O
- B.
Mg
- C.
Na
- D.
Ag
- 6.How many carbon and oxygen atoms does a CO2 molecule contain?
- A.
2 oxygen atoms and 2 carbon atoms
- B.
2 oxygen atoms and 1 carbon atom
- C.
1 carbon atom and 1 oxygen atom
- 7.
![Look carefully at this diagram of the atoms in some substances.
Which letter represents a mixture of elements? - ProProfs]( "Look carefully at this diagram of the atoms in some substances.
Which letter represents a mixture of elements?")
Look carefully at this diagram of the atoms in some substances. Which letter represents a mixture of elements?- A.
A
- B.
B
- C.
C
- D.
D
- E.
E
- F.
F
- 8.Little Jonny is doing an experiment. He notices after mixing two liquids that his new solution is becoming cloudy?? Little Jonny is like 'Yo whats going on here?!' - give little Jonny a tip to help him understand what is going on....
- A.
"Hey Jonny, I think your observation could be evidence of a combustion reaction"
- B.
"Hey Jonny, I think your observation could be evidence of a decomposition reaction"
- C.
"Hey Jonny, I think your observation could be evidence of a precipitation reaction"
- D.
Sorry Johnny no idea!
- 9.Little Jonny is doing an experiment. He notices after mixing two chemicals that his new solution is bubbling. Little Jonny is like 'Yo whats going on here?!' - give little Jonny a tip to help him understand what is going on....
- A.
"Hey Jonny, bubbles is evidence of a precipitation reaction"
- B.
"Hey Jonny, your observation means that a gas is being produced"
- C.
"Hey Jonny, bubbles is evidence of a physical change"
- D.
Sorry Johnny no idea!
- 10.Little Jonny has permission from his teacher to test the gas product with a match. When he does this, a high pitch pop sound is heard with a flash of light! "wow" says LIttle Jonny "What type of chemical reaction was that?!" Help Litte Jonny out. Which statement is the MOST correct?
- A.
"Hey Jonny, that pop sound was the sound of compounds breaking down in a decomposition reaction"
- B.
"Hey Jonny, when you burn something you see a release of energy in the form of light and heat, this should tell you that it is a combustion reaction"
- C.
"Hey Jonny, when you burn something you use the surrounding oxygen gas as a reactant which combines with your other reactant. A sudden release of energy in the form of light, sound and heat (pop) is observed and all of this is characteristic of a combustion reaction"
- D.
"Sorry Johnny no idea!"
Questions: 10 | Attempts: 40293 | Last updated: Aug 26, 2021
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