can chlorine gas be stored in copper cylinder ? given electrode potential for(Cu2+/Cu)= 0.34V and electode potential for (Cl2/Cl-)=1.36V

E^o_cell = E_cathode - E_anode.
Oxidation occurs at anode while reduction at cathode.
So,  E^o_cell = E^o_Cu²⁺/_Cu  - E^o_Cl2/Cl^-
E^o_cell  = 0.34 -(1.36)
E^o_cell = -1.02 V
As E^o_cell  is negative, therefore reaction is non- spontaneous, that is, reaction will  not occur. So we can place Cl₂ gas in Cu cylinder.