In a polar covalent bond, the distribution of common electrons are
a). not shared evenly due to a greater positive charge from one atom’s nucleus
b). pulled more strongly toward the smaller atom
c). shared evenly between the two atoms
d). taken completely by the more electronegative atom

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

Bis the answerhope it !