26Metal Reactivity CorrosionMedium1 markThe equation for the reaction between magnesium and aqueous copper(II) sulfate is shown.Mg+CuSO4→Cu+MgSO4Which statement is correct?ACopper ions are oxidised to copper metal during the reaction.BCopper is displaced because it is more reactive than magnesium.CThe oxidation number of magnesium decreases during the reaction.DThe reaction happens because magnesium has a greater tendency to form positive ions than copper.Grade answerGrading criteria