Question

The type of reaction that takes place when one element reacts with a compound to form a new compound and a different element is a ____

a. combination reaction.
b. decomposition reaction.
c. single-replacement reaction.
d. double-replacement reaction.

Answer 1

C. single replacement. A single replacement is represented by this formula : AB + C = AC + B

Answer 2

Answer: c. single-replacement reaction.

Explanation:

Combination is a chemical reaction in which two or more than two substances combine to form a single product.

`A+B\rightarrow AB`

Decomposition is a chemical reaction in which one substance decompose to form two or more than two products.

`AB\rightarrow A+B`

A single replacement is a chemical reaction in which a more reactive element displaces a less reactive element from its salt solution, thus one element reacts with a compound to form a new compound and a different element.

`A+BC\rightarrow B+AC`

Double displacement is a chemical reaction in which ion exchange takes place.

`AB+CD\rightarrow AD+BC`