Chemical Reactions and Types

The number of atoms you begin with in a chemical reaction ...

• must be the same as the number of  atoms you end with

• must be an even number

• can be different to the number you finish with

• changes depending on how much energy is formed

Tags

NGSS.MS-PS1-5

Which type of reaction is:

2 NaBr + Ca(OH)₂ → CaBr₂ + 2 NaOH

• Synthesis

• Single Displacement

• Double Displacement

• Combustion

Which type of reaction is: C₂H₄ + 3 O₂ → 2 CO₂ + 2 H₂O

• Synthesis

• Decomposition

• Single Displacement

• Combustion

Which type of reaction is: 2 NH₃ + H₂SO₄ → (NH₄)₂SO₄

• Synthesis

• Decomposition

• Single Displacement

• Double Displacement

What reaction has the following general formula:

• Synthesis

• Decomposition

• Combustion

• Single Replacement

• Double Replacement

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'.

Tags

NGSS.MS-PS1-1

Match the following Reaction types

• Combustion

• Zn(s) + 2HCl(aq) --> ZnCl₂(aq) + H₂

• Single replacement

• CH₃CO₂H +H₂O --> CH₃CO₂^- + H₃O⁺

• Synthesis

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

• Decomposition

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

• Acid-Base

• 2H₂O₂ + light --> 2H₂0 + O₂

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

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-PS1-1

Identify the type of chemical reaction

• Synthesis

• Decomposition

• Single replacement

• Double replacement

• Combustion

Tags

Types of Reactions

What type of molecule is each of the following?

1. NaCl​ (a)  

2. HCl ​ (b)  

3. KI ​ (c)  

4. CO₂ ​ (d)  

• Ionic

• Covalent

Tags

NGSS.MS-PS1-1