Question

which of the following general formulas represents a single - replacement reaction?
a + bc = ac + b
a + b = ab
ab = a + b
ab + cd = ad + cb

Explanation:

To determine the single - replacement reaction, we recall the definitions of different reaction types:

1. Single - replacement reaction: In this type of reaction, one element replaces another element in a compound. The general form is \(A + BC

ightarrow AC + B\), where element \(A\) replaces element \(B\) in the compound \(BC\).

1. Synthesis reaction: The general form is \(A + B

ightarrow AB\), where two or more substances combine to form a single product.

1. Decomposition reaction: The general form is \(AB

ightarrow A + B\), where a single compound breaks down into two or more simpler substances.

1. Double - replacement reaction: The general form is \(AB+CD

ightarrow AD + CB\), where the positive and negative ions of two ionic compounds exchange places.

By comparing the given options with these definitions, we can see that the formula \(A + BC = AC + B\) (Option A) matches the general form of a single - replacement reaction.

Answer:

A. \(A + BC = AC + B\)