22. Which of the following reactions shows nickel (Ni) getting oxidized? a. Ni(OH)2(s) + 2 HC1 (aq) ---------------> NiCh (aq) + 2 H2O (1) b. Ni(NO3)2 (aq) + 2 KOH (aq) ---------------> Ni(OH)2 (s) + 2 KNO3 (aq) (© Ni (s) + 2 Cl2 (g) --------------------> NİCI4 (aq) d. Ni(NO3)4 (aq) + Cu(s) ---------------> Ni(NO3)2 (aq) + Cu(NO3)2 (aq) e. both a and b