The chemical equation Cr + Fe(NO₃)₂ → Fe + Cr(NO₃)₂ is an example of which type of reaction?

Rationale

Cr + Fe(NO₃)₂ → Fe + Cr(NO₃)₂ is an example of a single replacement reaction.

In this reaction, chromium (Cr) displaces iron (Fe) from iron(II) nitrate (Fe(NO₃)₂), demonstrating the characteristics of a single replacement reaction where one element replaces another in a compound.

A (Single replacement) CORRECT

In a single replacement reaction, one element takes the place of another element in a compound. This is exactly what occurs in the provided equation, where chromium replaces iron in iron(II) nitrate, resulting in the formation of chromium(II) nitrate and elemental iron. The essential features of this reaction align perfectly with the definition of a single replacement reaction.

B (Decomposition) YOUR ANSWER

Decomposition reactions involve a single compound breaking down into two or more simpler substances. In this case, no single substance is decomposing; rather, an element is replacing another within a compound. Thus, this choice does not accurately describe the reaction presented.

C (Double replacement) YOUR ANSWER

Double replacement reactions involve two compounds exchanging components to form two new compounds. The reaction in question features a single element replacing another in a compound, rather than a swap between two compounds. As such, this choice does not fit the characteristics of the reaction.

D (Combustion) YOUR ANSWER

Combustion reactions typically involve a substance reacting with oxygen to produce heat and light, often resulting in carbon dioxide and water. The reaction provided does not involve combustion; it is instead a straightforward example of an element displacing another in a compound, thus making this choice incorrect.

Conclusion

The reaction Cr + Fe(NO₃)₂ → Fe + Cr(NO₃)₂ exemplifies a single replacement reaction where chromium displaces iron from iron(II) nitrate. Other options, including decomposition, double replacement, and combustion, do not align with the reaction's fundamental properties. Understanding these classifications enhances comprehension of chemical behavior and reaction types in chemistry.

The chemical equation Cr + Fe(NO₃)₂ → Fe + Cr(NO₃)₂ is an example of which type of reaction?

Cr + Fe(NO₃)₂ → Fe + Cr(NO₃)₂ is an example of a single replacement reaction.

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