Types of Reaction

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

The equation H₃PO₄ + 3KOH --> K₃PO₄ + 3H₂O is an example of which type of reaction?

• combustion

• decomposition

• single replacement

• double replacement

• synthesis

Answer explanation

Reactants: 2 compounds

Products: 2 new compounds

Ex: AB + CD --> AD + CB

What reaction has the following general formula:

• Synthesis

• Decomposition

• Combustion

• Single Replacement

• Double Replacement

Tags

NGSS.MS-PS1-2

Identify the type of chemical reaction

• Synthesis

• Decomposition

• Single replacement

• Double replacement

• Combustion

Tags

Types of Reactions

What type of reaction involves the breaking down of a substance into simpler substances?

• Single Displacement Reaction

• Double Displacement Reaction

• Synthesis Reaction

• Decomposition Reaction

Tags

NGSS.MS-PS1-2

Match the following Reaction types

• Combustion

• Zn(s) + 2HCl(aq) --> ZnCl₂(aq) + H₂

• Synthesis

• 6CO₂ + 6H₂0 + light energy --> C₆H₁₂O₆ + 6O₂

• Acid-Base

• C₆H₁₂O₆(s) + O₂ (g) --> 6CO₂ + 6H₂O(l) + heat

• Decomposition

• CH₃CO₂H +H₂O --> CH₃CO₂^- + H₃O⁺

• Single replacement

• 2H₂O₂ + light --> 2H₂0 + O₂

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-4

A new compound is formed by the combination of simpler reactants, such as nitrogen dioxide and oxygen combine (a component of smog) forming in the atmosphere. This is a ​ (a)  

• synthesis reaction

• decomposition reaction

• combustion reaction

Answer explanation

The question describes a process where simpler reactants, nitrogen dioxide and oxygen, combine to form a new compound. This is a characteristic of a synthesis reaction, where two or more simple substances combine to form a more complex substance. Therefore, the correct answer is 'synthesis reaction'.

What type of reaction occurs between an element and a compound?

Ex: Zn + 2HCl --> ZnCl₂ + H₂

• Synthesis

• Decomposition

• Single Replacement

• Double Replacement