Norder to observe a property of a substance, the substance must interact with another substance, such as when gasoline burns or when sodium metal reacts with water.

The activity series is shown in the attached picture. if the element is below the other, then you can displace the other. following the activity series as a guide, the reactions are as follows: nickel and aluminum chloride3 ni + 2 alcl₃  → 3 nicl₂ + 2 albarium and copper bromideba + cubr  →  no reaction because cu is less oxidizable than bapotassium nitrate and aluminum3 kno₃ + al  → al(no₃)₃ + 3 ksodium phosphate and zincnaso₄ + zn  → znso₄ + na

They are all solids.

Use a magnet to separate iron, evaporate water, i'm not sure how to separate the other two i'm sorry but good luck

The correct answer is:   bri hope this answer was ! : )