Synthesis Decomposition Combustion

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

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

What kind of reaction is this:
2C₃H₇OH +9O₂ -> 6CO₂ + 8H₂O

• Double Replacement

• Combustion

• Single Replacement

• Decomposition

Answer explanation

Reactants: A hydrocarbon and oxygen

Products: water and carbon dioxide

Tags

NGSS.MS-PS1-2

What are the types of combustion?

• Complete & incomplete

• Incomplete & inexact

• Impossible & complete

• Computer & incompete

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

Which type of reaction takes place in the presence of oxygen and produces carbon dioxide and water?

• double replacement 

• decomposition 

• combustion 

• single replacement

Answer explanation

Reactants: A hydrocarbon and oxygen

Products: water and carbon dioxide

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

In a combustion reaction, one of the reactants is ____.

• carbon

• oxygen

• hydrogen

• nitrogen

Answer explanation

You need OXYGEN to combust (or burn).

One reactant turns into several products.

• Decomposition

• Synthesis

• Combustion

• Single Replacement