Synthesis and Decomposition

Identify the reaction type:

H₂O₂ --> H₂O + O₂

• Decomposition

• Synthesis

• Combustion

• Acid Base

What type of reaction is this?

Al(OH)₃ → Al₂O₃ + H₂O

• Combination

• Decomposition

• Single Replacement

• Double Replacement

one compound breaks down into two or more simpler compounds

• double displacement reaction

• decomposition reaction

• synthesis reaction

• single displacement reaction

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

A decomposition reaction can be recognized because it has...

• only one product

• only one reactant

• 2 or more reactants and 2 or more products

• the presence of a catalyst

What kind of reaction is this:
2H₂ + O₂ --> 2H₂O

• Synthesis

• Decomposition

• Single Replacement

• Double Replacement

Answer explanation

Two or more elements/ compounds combine to make a more complex substance.

Ex: A + B --> AB

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What kind of reaction is this:
4Fe  +  3O₂ →   2Fe₂O₃ 

• Synthesis

• Decomposition

• Single Replacement 

• Double Replacement

Answer explanation

Two or more elements/ compounds combine to make a more complex substance

Ex: A + B --> AB

Tags

NGSS.MS-PS1-2

What kind of reaction is this:
2H₂O₂ →2 H₂O + O₂

• Synthesis

• Decomposition

• Single Replacement 

• Combustion

Answer explanation

Compounds break down 

into simpler substances.

Ex: AB --> A + B

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

An element and a different element react to form one product- this is an example of which type of chemical reaction? 

• combustion

• decomposition 

• synthesis 

• single replacement

Answer explanation

Ex: A + B --> AB

Tags

NGSS.MS-PS1-5

What type of reaction is illustrated below?
2HI --> H₂  +  I₂

• synthesis

• decomposition

• single replacement

• double replacement

Answer explanation

Compounds break down 

into simpler substances.

Ex: AB --> A + B