Answer : The missing product for this reaction will be, zinc chloride
Explanation :
Single replacement reaction : A chemical reaction in which the more reactive metal replace the less reactive metal.
It is represented as,
In this reaction, A is more reactive element and B is less reactive element.
The balanced chemical reaction will be,
The given reaction is type of single displacement reaction in which zinc the most reactive metal displaces the copper which is a least reactive metal to form zinc chloride and copper as a product.
Hence, the missing product for this reaction will be, zinc chloride.