Chemical Reactions Exam

Which statement best describes a decomposition reaction?

• A hydrocarbon burns to form carbon dioxide and water

• Two or more reactants form one product

• A single reactant forms multiple products

• An element reacts with a compound to form a new element and compound

• Two aqueous compounds react to from a solid and a new aqueous compound

Tags

NGSS.MS-PS1-5

Which of the following reacts with a hydrocarbon fuel during a combustion reaction?

• water (H₂O)

• nitrogen (N₂)

• carbon dioxide (CO₂)

• oxygen (O₂)

Which statement best describes a synthesis reaction?

• A hydrocarbon burns to form carbon dioxide and water

• Two or more reactants form one product

• A single reactant forms multiple products

• An element reacts with a compound to form a new element and compound

• Two aqueous compounds react to from a solid and a new aqueous compound

Which statement best describes a double replacement (ionic precipitation) reaction?

• A hydrocarbon burns to form carbon dioxide and water

• Two or more reactants form one product

• A single reactant forms multiple products

• An element reacts with a compound to form a new element and compound

• Two aqueous compounds react to from a solid and a new aqueous compound

When balancing a chemical reaction, which of the following can be changed?

• coefficients

• subscripts

• formulas of the products and reactants

• the elements involved in the reaction

Tags

NGSS.HS-PS1-7

Refer to the activity series shown here.

Which compound is higher in reactivity, Ag or Ca?

• Ag

• Ca

• Both are equally reactive.

• The activity series cannot be used to predict reactivity.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following shows the UNBALANCED reaction for when

hexane (C₆H₁₄) reacts with oxygen to produce carbon dioxide and water.

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• 
• 
• 

Tags

NGSS.HS-PS1-7

Balance the following reaction and identify the type of reaction:

​ 2 C₆H₁₄ + ​ (a)   O₂ → ​ (b)   CO₂ + ​ (c)   H₂O

Type:​ (d)  

• 19
• 12
• 14
• 7
• 9
• single replacement
• combustion
• decomposition
• 6
• synthesis

Tags

NGSS.HS-PS1-7

Which of the following shows the UNBALANCED reaction for when

iron is dropped into copper(II) sulfate to produce copper and iron(III) sulfate.

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• 
• 
• 

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Balance the following reaction and identify the type of reaction:

​ (a)   Fe + ​ (b)   CuSO₄ → ​ 3 Cu + ​ (c)   Fe₂(SO₄)₃

​

Type:​ (d)  

• 4
• single replacement
• combustion
• decomposition
• 6
• synthesis
• 2
• 3
• double replacement
• 1