Final answer:
The correct answer to which of the provided reactions is a single replacement reaction is option a. CuO + H₂ → Cu + H₂O. This represents a single displacement where hydrogen (H₂) replaces copper (Cu) in copper oxide (CuO) to form copper metal and water (H₂O).
Step-by-step explanation:
The question asks which of the given reactions is a single replacement reaction. A single replacement reaction is a type of chemical reaction where an element reacts with a compound and takes the place of another element in that compound, forming a new compound and displacing the other element. Given the reactions provided, option a. CuO + H₂ → Cu + H₂O represents a single replacement reaction, where hydrogen (H₂) is replacing copper (Cu) in the compound CuO to form copper metal (Cu) and water (H₂O).
Here's a step-by-step explanation for the correct option:
- Identify the reactants: CuO and H₂.
- Recognize that H₂ is an element and CuO is a compound.
- Observe that in the product side: Cu has become free as a metal, and H is now part of the compound H₂O.
- This is a classic case of a single displacement where one element in a compound is replaced by another element.