A) \[N{{a}^{+}}\]
B) \[L{{i}^{+}}\]
C) \[Z{{n}^{2+}}\]
D) \[C{{u}^{2+}}\]
Correct Answer: D
Solution :
The order of these species in electro-chemical series, from top to bottom is \[L{{i}^{+}},N{{a}^{+}},Z{{n}^{2+}}\] and \[C{{u}^{2+}}\]. In electrochemical series, as we move from top to bottom, the oxidising power increases, hence, \[C{{u}^{2+}}\] is the strongest oxidising agent among these.
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