Chemistry Questions

Define a single replacement reaction.

• A compound reacts with another compound to produce two new compounds.
• A hydrocarbon reacts with water to produce carbon dioxide and water. 
• An element reacts with a compound and produces a new compound if the single element is higher in reactivity.
• An element reacts with another element to produce a compound. 

What are the products of this reaction: Fe + Na₂CO₃ ?

• Na₂ + Fe(CO₃)₂
• Na + CO₃Fe
• Na + Fe₂CO₃
• No Reaction

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the generic formula for a single replacement reaction? 

• A + BC ---> CA + B
• A + BC ---> BC + A
• A + BC ---> AB + C
• A + BC ---> AC + B

How is the following reaction classified?

3Ca + 2AlCl₃ --> 3CaCl₂ + 2Al

• Synthesis

• Decomposition

• Single Displacement

• Double Displacement

How is the following reaction classified?

4Si + S₈ --> 2Si₂S₄

• Synthesis

• Decomposition

• Single Displacement

• Double Displacement

How is the following reaction classified?

2Pb(NO₃)₂ --> 2PbO + 4NO₂ + O₂

• Synthesis

• Decomposition

• Single Displacement

• Combustion

Classify the reaction:
Zn + CuCl₂ → ZnCl₂ + Cu

• Single Replacement
• Double Replacement
• Decomposition
• Synthesis

Which of the following is the correct balanced equation for Cu₂O₃ → Cu + O₂

• Cu₂O₂ → 2Cu + O₂
• 2Cu₂O₃ → 4Cu + 3O₂
• 3Cu₂O₃ → 6Cu + 3O₂
• 2Cu₂O₃ → 2Cu + 3O₂

Tags

NGSS.HS-PS1-7

Which problem is balanced?

• PbO₂ + 2H₂
• SO₂ + H₂0 --> H₂SO₄
• 2Na + 2H₂O --> 2NaOH + H₂

Tags

NGSS.HS-PS1-7

A + B → AB : is the general form for which reaction type?

• Double Replacement
• Synthesis
• Combustion
• Decomposition