Chemical Reactions Practice Quiz

The active ingredient in an antacid tablet is calcium hydroxide. When calcium hydroxide enters the stomach, it reacts with hydrochloric acid to form calcium chloride and water. In this reaction, calcium hydroxide is a _________ and calcium chloride is a ______.

• Reactant, product

• Reactant, reactant

• Product, reactant

• Product, product

The reaction represented by the equation, Mg (s) + 2 HCl (aq) → H₂ (g) + MgCl₂ (aq), is a

• Combustion reaction

• Decomposition reaction

• Single replacement reaction

• Double displacement reaction

A student is places 0.5 M HCl and a 5 g chunk of Mg in Beaker #1 and 0.5 M HCl and 5 g powdered Mg in Beaker #2. Which beaker would react the fastest and why?

• Beaker #1, it has more HCl

• Beaker #2, it has less HCl

• Beaker #2, it has more surface area for Mg

• Beaker #1, it has less surface area for Mg

Which of the following is the best description of a chemical reaction?

• When molecules of a substance move slowly enough, they link together to form a crystalline structure.

• When two molecules collide with enough force, old chemical bonds are broken and new bonds form, resulting in one or more new substances.

• When two molecules collide with enough force, they shatter into individual atoms. Later, these atoms join up in new combinations to form new substances.

• When two atoms collide with enough force, their nuclei fuse together, forming new substances and releasing tremendous amounts of energy.

Which reaction is a combustion reaction?

• 4 P + 5 O₂ → P₄O₁₀

• 2 Al(OH)₃ + 3 H₂SO₄ → Al₂(SO₄)₃ + 6 H₂O

• C + O₂ → CO₂

• C₇H₁₅OH + 11 O₂ → 7 CO₂ + 8 H₂O

Based on the information provided, what is the type of chemical reaction? ______+______ → CO₂ + H₂O

• Combustion

• Double Displacement

• Synthesis

• Decomposition

Based on the information provided, what is the type of chemical reaction: CuCl₂ + H₂S → _______ + 2 HCl?

• Double Displacement

• Single Displacement

• Synthesis

• Decomposition

Based on the information provided, what is the type of chemical reaction: Pb(CO₃)₂ → ______ + _______?

• Combustion

• Single Displacement

• Synthesis

• Decomposition

Based on the information provided, what is the type of chemical reaction: Cl₂ + 2 NaBr → 2 NaCl + Br₂?

• Double Displacement

• Single Displacement

• Synthesis

• Decomposition

Based on the information provided, what is the type of chemical reaction: _____ + ______ → 2 MgO?

• Synthesis

• Single Displacement

• Double Displacement

• Combustion