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(B) $(i)$ Statement $(A)$ is true: Due to the inert pair effect,$Tl^{+}$ is more stable than $Tl^{3+}$. Therefore,$Tl^{3+}$ acts as a powerful oxidisi

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$(A), (B), (D) 	ext{ and } (E) 	ext{ only}$

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(B) $(i)$ Statement $(A)$ is true: Due to the inert pair effect,$Tl^{+}$ is more stable than $Tl^{3+}$. Therefore,$Tl^{3+}$ acts as a powerful oxidising agent to gain electrons and form the more stable $Tl^{+}$ state.$(ii)$ Statement $(B)$ is true: The standard reduction potential $E^0_{Al^{3+}/Al} = -1.66 \ V$ is very low,meaning $Al^{3+}$ is not easily reduced.$(iii)$ Statement $(C)$ is false: $Tl^{3+}$ is unstable in solution due to the inert pair effect.$(iv)$ Statement $(D)$ is true: $Tl^{+}$ is more stable than $Tl^{3+}$ due to the inert pair effect.$(v)$ Statement $(E)$ is true: $Al^{3+}$ is the most stable oxidation state for Aluminum,and $Tl^{+}$ is the most stable oxidation state for Thallium.Thus,statements $(A), (B), (D), 	ext{ and } (E)$ are correct.

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