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.

c. single-replacement reaction.

Explanation:

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

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

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.

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

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