Which of the following gases are typically used for colorful lighting when an electric current is applied?
a) hydrogen and helium
b) argon and krypton
c) fluorine and chlorine
d) oxygen and nitrogen

B) Argon and Krypton
The unreactive nature of noble gases allows them to be applied in such places without the risk of poisonous leaks or other disasters.

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