9-11 May 2023 Békornis

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 formula AB → A+B represents what type of chemical reaction?

• synthesis
• decomposition
• single displacement
• double replacement

Answer explanation

Compounds break down 

into simpler substances.

Ex: AB --> A + B

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

Which of the following is NOT a type of Redox reaction (electrons gained/lost)?

• Single Replacement

• Double Replacement

• Combustion

• Decomposition

• Synthesis

​ (a)   reactions have 1 compound on both sides while ​ (b)   reactions have 2 compounds on both sides.​ (c)   reactions break apart. ​ (d)   reactions ​combine. ​ (e)   reactions must have O₂ as a reactant & CO₂ and ​H₂O as products.

• Single replacement
• double replacement
• Decomposition
• Synthesis
• Combustion
• covalent
• Covalent
• Ionic
• Redox
• Heterogeneous

The reactants will be bigger than the products in a ​ (a)   reaction. ​ (b)   reactions have 1 element and 1 compound. The products will be bigger than the reactants in a ​ (c)   reaction. Fuel and oxygen are needed in a ​ (d)   reaction. ​ (e)   reactions have 2 compounds.

• decomposition
• Single Replacement
• synthesis
• combustion
• Double replacement
• Covalent
• Ionic
• Metallic
• Homogeneous
• Heterogeneous

Choose the correct answers:

​ (a)   is/are combustion. ​ (b)   is/are synthesis. ​ (c)   is/are decomposition. ​ (d)   is/are single or double replacement.

• #1
• #2 and #3
• #4
• None
• #2 and #4
• #1 and #2
• #2
• #3
• #1 and #3
• #3 and #4

What will the products of each reaction look like?

Mg + N₂ --> ​ (a)  

Zn + HCl --> ​ (b)  

AlCl₃ + Na₂SO₄ --> ​ (c)  

C₄H₈ + O₂ --> ​ (d)  

H₂O --> ​ (e)  

• 1 larger product
• 1 element + 1 compound
• 2 compounds
• CO2 + H2O
• 2 smaller products
• 2 larger products
• 3 compounds
• 1 smaller product

Put the equations in this order: decomposition, synthesis, combustion, single replacement, double replacement.

• 
• 
• 
• 
• 

The reactants will be bigger than the products in a ​ (a)   reaction. ​ (b)   reactions have 1 element and 1 compound. The products will be bigger than the reactants in a ​ (c)   reaction. Fuel and oxygen are needed in a ​ (d)   reaction. ​ (e)   reactions have 2 compounds.

• decomposition
• Single Replacement
• synthesis
• combustion
• Double replacement
• Covalent
• Ionic
• Metallic
• Homogeneous
• Heterogeneous