Chemical Reactions Classification Quiz

What is the purpose of classifying chemical reactions into different types?

• To make them more complex

• To help predict products of unknown but similar chemical reactions

• To create new elements

• To study their history

What is a synthesis reaction?

• A reaction where one reactant splits into two products.

• A reaction where two reactants combine to form one product.

• A reaction where two products combine to form one reactant.

• A reaction where one product splits into two reactants.

Which of the following is an example of a synthesis reaction?

• 2Na + Cl₂ → 2NaCl

• 2H₂O → 2H₂ + O₂

• H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O

• NH₃ + HCl → NH₄Cl + H₂

What is the correct representation of a decomposition reaction?

• A + B → AB

• AB → A + B

• A + BC → AC + B

• AB + CD → AD + CB

What is a single replacement reaction?

• A reaction where two compounds exchange ions.

• A reaction where one atom changes places with another atom.

• A reaction where two atoms combine to form a new compound.

• A reaction where a compound breaks down into simpler substances.

Which of the following is an example of a single replacement reaction?

• Zn + 2HCl → ZnCl₂ + H₂

• NaCl + AgNO₃ → AgCl + NaNO₃

• H₂ + O₂ → H₂O

• CaCO₃ → CaO + CO₂

What type of chemical reaction is characterized by the exchange of atoms between two compounds to form two new compounds?

• Synthesis reaction

• Decomposition reaction

• Double-replacement reaction

• Single-replacement reaction

In a double-replacement reaction, if compound AD reacts with compound BC, what are the products?

• AB + CD

• AC + BD

• AD + BC

• AB + DC

What are the products of a combustion reaction?

• Carbon monoxide and hydrogen

• Carbon dioxide and oxygen

• Carbon dioxide and water

• Oxygen and water

Which of the following is a correct representation of a combustion reaction?

• C_xH_y + O₂ → CO + H₂O

• C_xH_y + O₂ → CO₂ + H₂

• C_xH_y + O₂ → CO₂ + H₂O

• C_xH_y + O₂ → C + H₂O