What is produced during the replacement reaction of CU(NO3)2 and zn is
Zn(NO3)2 +Cu (answer 4)
explanation
Replacement reaction is a type of chemical reaction in which an element react with a compound and take the place of another element in that compound.
Zn is more reactive than Cu, therefore Zn replaces cu from CU(NO3)2 to form Zn(NO3)2 +Cu
