Reaction Types Quiz: How Much You Know?

1. Identify the following reaction type using the codes: DR double replacement. SR single replacement SYN synthesis DEC decomposition COMB combustion AB acid/base neutralization 2 NO₂ à 2 O₂ + N₂

The given reaction represents a decomposition reaction (DEC) because it involves the breakdown of a compound into simpler substances. In this case, 2 molecules of NO2 are decomposed into 2 molecules of O2 and 1 molecule of N2.

Explanation

The given reaction represents a decomposition reaction (DEC) because it involves the breakdown of a compound into simpler substances. In this case, 2 molecules of NO2 are decomposed into 2 molecules of O2 and 1 molecule of N2.

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2. Identify the following reaction type using the codes: DR double replacement. SR single replacement SYN synthesis DEC decomposition COMB combustion AB acid/base neutralization Pb + FeSO₄ à PbSO₄ + Fe

The given reaction involves a single replacement, also known as a substitution reaction. In this type of reaction, one element or ion is substituted for another element or ion in a compound. In the given reaction, lead (Pb) is replacing iron (Fe) in the compound FeSO4, resulting in the formation of PbSO4 and Fe.

Explanation

The given reaction involves a single replacement, also known as a substitution reaction. In this type of reaction, one element or ion is substituted for another element or ion in a compound. In the given reaction, lead (Pb) is replacing iron (Fe) in the compound FeSO4, resulting in the formation of PbSO4 and Fe.

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3. Identify the following reaction type using the codes: DR double replacement. SR single replacement SYN synthesis DEC decomposition COMB combustion AB acid/base neutralization 2 C₅H₅ + Fe à Fe(C₅H₅)₂

The given reaction involves the combination of two reactants, 2 C5H5 and Fe, to form a product, Fe(C5H5)2. This is a synthesis reaction, also known as a combination reaction, where two or more substances combine to form a single product. In this case, the two reactants combine to form a complex compound, Fe(C5H5)2.

Explanation

The given reaction involves the combination of two reactants, 2 C5H5 and Fe, to form a product, Fe(C5H5)2. This is a synthesis reaction, also known as a combination reaction, where two or more substances combine to form a single product. In this case, the two reactants combine to form a complex compound, Fe(C5H5)2.

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4. Which of the following reactions is not properly balanced?

C5H9O + O2 à CO2 + H2O

C + O2® CO2

P4 + 3 O2 à 2 P2O3

SeCl6 + O2 à SeO2 + 3Cl2

The given reaction C5H9O + O2 à CO2 + H2O is not properly balanced because the number of carbon atoms, hydrogen atoms, and oxygen atoms are not equal on both sides of the equation.

Explanation

The given reaction C5H9O + O2 à CO2 + H2O is not properly balanced because the number of carbon atoms, hydrogen atoms, and oxygen atoms are not equal on both sides of the equation.

5. Identify the following reaction type using the codes: DR double replacement. SR single replacement SYN synthesis DEC decomposition COMB combustion AB acid/base neutralization Na₃PO₄ + 3 KOH à 3 NaOH + K₃PO₄

The given chemical equation represents a double replacement reaction. In this type of reaction, the cations and anions of two different compounds switch places, resulting in the formation of two new compounds. In this case, sodium phosphate (Na3PO4) reacts with potassium hydroxide (KOH) to produce sodium hydroxide (NaOH) and potassium phosphate (K3PO4). The cations (Na+ and K+) and anions (PO4- and OH-) have exchanged partners, indicating a double replacement reaction.

Explanation

The given chemical equation represents a double replacement reaction. In this type of reaction, the cations and anions of two different compounds switch places, resulting in the formation of two new compounds. In this case, sodium phosphate (Na3PO4) reacts with potassium hydroxide (KOH) to produce sodium hydroxide (NaOH) and potassium phosphate (K3PO4). The cations (Na+ and K+) and anions (PO4- and OH-) have exchanged partners, indicating a double replacement reaction.

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6. Which type of reaction breaks down a single reactant into two or more products?

Single replacement

Double replacement

Synthesis

Decomposition

Combustion

Decomposition is the type of reaction that breaks down a single reactant into two or more products. In this type of reaction, a compound is broken down into its constituent elements or simpler compounds. This process usually requires the input of energy, such as heat or light, to break the chemical bonds within the reactant molecule. As a result, the reactant molecule is broken down into multiple products, which can be elements or compounds. Therefore, decomposition is the correct answer to the question.

Explanation

Decomposition is the type of reaction that breaks down a single reactant into two or more products. In this type of reaction, a compound is broken down into its constituent elements or simpler compounds. This process usually requires the input of energy, such as heat or light, to break the chemical bonds within the reactant molecule. As a result, the reactant molecule is broken down into multiple products, which can be elements or compounds. Therefore, decomposition is the correct answer to the question.

7. Which type of reaction forms a single product from two or more reactants?

Single replacement

Double replacement

Synthesis

Decomposition

Combustion

Acid-base neutralization

Synthesis reactions involve the combination of two or more reactants to form a single product. This type of reaction is characterized by the formation of a new compound from the reactants, often with the release of energy. It is the opposite of a decomposition reaction, where a single compound breaks down into two or more simpler substances. In synthesis reactions, the reactants come together to create a more complex product.

Explanation

Synthesis reactions involve the combination of two or more reactants to form a single product. This type of reaction is characterized by the formation of a new compound from the reactants, often with the release of energy. It is the opposite of a decomposition reaction, where a single compound breaks down into two or more simpler substances. In synthesis reactions, the reactants come together to create a more complex product.

8. List the correct order of coefficients in the following reaction: ____ HBr + ___ Al(OH)₃ à ___ H₂O + ___ AlBr₃

The correct order of coefficients in the given reaction is 3131. This means that there is one HBr molecule reacting with three molecules of Al(OH)3 to produce three molecules of H2O and one molecule of AlBr3.

Explanation

The correct order of coefficients in the given reaction is 3131. This means that there is one HBr molecule reacting with three molecules of Al(OH)3 to produce three molecules of H2O and one molecule of AlBr3.

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9. List the correct order of coefficients in the following reaction: ____ Pb + ____ H₃PO₄ à ____ H₂ + ____ Pb₃(PO₄)₂

The correct order of coefficients in the given reaction is 3 Pb + 2 H3PO4 à 3 H2 + 1 Pb3(PO4)2.

Explanation

The correct order of coefficients in the given reaction is 3 Pb + 2 H3PO4 à 3 H2 + 1 Pb3(PO4)2.

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10. Choose the following reactions where oxygen is a reactant; thus, and combustion takes place.

C5H9O + O2 à CO2 + H2O

C + O2® CO2

P4 + 3 O2 à 2 P2O3

SeCl6 + O2 à SeO2 + 3Cl2

All of the given reactions involve oxygen as a reactant, indicating that combustion takes place. In these reactions, oxygen combines with other elements or compounds to form carbon dioxide, water, phosphorus oxide, or chlorine gas. Combustion reactions typically involve the reaction of a fuel (such as hydrocarbons or elemental carbon) with oxygen, producing carbon dioxide and water as products. Therefore, all of the given reactions exhibit combustion.

Explanation

All of the given reactions involve oxygen as a reactant, indicating that combustion takes place. In these reactions, oxygen combines with other elements or compounds to form carbon dioxide, water, phosphorus oxide, or chlorine gas. Combustion reactions typically involve the reaction of a fuel (such as hydrocarbons or elemental carbon) with oxygen, producing carbon dioxide and water as products. Therefore, all of the given reactions exhibit combustion.

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