Chemical Reactions

What type of reaction is this? H₂ + O₂ -> H₂O

• synthesis
• decomposition
• single replacement
• double replacement
• combustion

What signs indicate that a reaction has taken place? Check all that apply.​ (a)   ​ (b)   ​ (c)   ​ (d)   ​ ​ (e)  

• change in color
• production of heat
• bubbles/fizzing
• production of a gas
• formation of a precipitate
• no change in temperature
• increase in mass
• solidification of a liquid

If the reactants are Al and F2, what is the product?

• AlF3

• AlF

• AlF4

Iodine(I) is what type of element?

• monoatomic
• diatomic
• triatomic

What type of reaction is this?

CH₄ + O₂ -> CO₂ + H₂O

• synthesis
• decomposition
• single replacement
• double replacement
• combustion

When copper carbonate decomposes, what will the products be?

Cu(CO₃) -> ?

• oxygen and copper chloride
• copper oxide and carbon dioxide
• Copper oxide and water

What does a burning stick produce? ( Hint: any wood contains CARBON)

• oxygen

• carbon dioxide

• nitrogen

• hydrogen

What gas had to be present to cause the stick to burn?

(a)  

What type of reaction is this?

AB + CD -> AD + CB

• Synthesis
• Decomposition
• Single replacement
• Double replacement
• Combustion

When copper wire is dropped into silver nitrate, what did you see? (Hint: Copper is more reactive than silver.)

• formation of a solid on the wire

• production of gas

• production of light
• change in volume