NEET Chemistry Question (2026) — Solution

Step-by-step solution

A 1:3 electrolyte dissociates in an aqueous solution to give one cation and three anions, or vice versa, producing a total of four ions per formula unit. [ Co(NH _3)_3( NO _2)_3] is a neutral complex and does not dissociate into ions. It is a non-electrolyte. [ CoCl _2( NH _3)_4] Cl [ CoCl _2( NH _3)_4]^ + + Cl ^ - (1:1 electrolyte) [ CoCl(NH _3)_5] Cl _2 [ CoCl(NH _3)_5]^ 2+ + 2 Cl ^ - (1:2 electrolyte) [ Co(NH _3)_6] Cl _3 [ Co(NH _3)_6]^ 3+ + 3 Cl ^ - (1:3 electrolyte) Thus, [ Co(NH _3)_6] Cl _3 is a 1:3 electrolyte. Answer: [ Co(NH _3)_6] Cl _3