Question

Which one of the following statement is incorrect?

• A. $T{i}^{3+}$ salts are better oxidising agents
• B. $G{a}^{+}$ salts are better reducing agents
• C. $P{b}^{4+}$ salts are better oxidising agents
• D. $A{s}^{5+}$ salts are better oxidising agents

Answer 1

The correct option is D $A{s}^{5+}$ salts are better oxidising agents

$T{i}^{3+}+2e^{-}\to T{i}^{+}$ (more stable); $T{i}^{3+}$ is an oxidising agent. (correct)

$G{a}^{+}-2e^{-}\to G{a}^{3+}$ (more stable), $G{a}^{+}$ is a reducing agent. (Correct)

$P{b}^{4+}+2e^{-}\to P{b}^{2+}$ (more stable), $P{b}^{4+}$ is an oxidising agent. (Correct)

$A{s}^{5+}+2e^{-}\to A{s}^{3+}$ (less stable).

Thus, $A{s}^{5+}$ cannot be reduced. $A{s}^{5+}$ salts are not a good oxidising agent.