Question

Cu(NO3)2(aq)+Mg(s)→Mg(NO3)2(aq)+Cu(s) is an example of which type of reaction?

Responses

combustion

combustion

decomposition

decomposition

single-displacement

single-displacement

double-displacement

Answer 1

Single-displacement.

Magnesium metal displaces copper from copper(II) nitrate to form magnesium nitrate and elemental copper (Mg → Mg2+; Cu2+ → Cu), so it's a single‑replacement (redox) reaction.