Chemistry Predicting Products

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

Which type of reaction can be recognized by the general pattern?
A + BC--> AC + B

• Decomposition

• Combustion

• Single Replacement

• Double Replacement

Answer explanation

Reactants: a single element and a compound

Products: a new compound and a different single element

Which of the following general formulas represents a single-displacement reaction?

• AB → A + B   

• A + B → AB

• A + BC → AC + B

• AB + CD → AD + CB

Answer explanation

Reactants: a single element and a compound

Products: a new compound and a different single element

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

One reactant turns into several products.

• Decomposition

• Synthesis

• Combustion

• Single Replacement

An acid/base reaction is a specific type of ___ reaction.

• Decomposition

• Synthesis

• Combustion

• Single Replacement

• Double Replacement

Answer explanation

Reactants: A hydrocarbon and oxygen

Products: water and carbon dioxide

The cations in two compounds switch. 

• Synthesis

• Combustion

• Single Replacement

• Double Replacement

Answer explanation

Reactants: 2 compounds

Products: 2 new compounds

Ex: AB + CD --> AD + CB

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

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

• carbon

• oxygen

• hydrogen

• nitrogen

Answer explanation

You need OXYGEN to combust (or burn).

Tags

NGSS.MS-PS1-1

The following is what type of reaction:
PbCl₂ + AgNO₃ → Pb(NO₃)₂ + AgCl

• Synthesis

• Decomposition

• Single Replacement

• Double Replacement