Question

Consider the following standard electrode potentials ($E^0$ in volts) in aqueous solution:

Element	$M^{3+}/M$	$M+/M$
AI	$-1.66$	$+0.55$
TI	$+1.26$	$-0.34$

Based on these data, which of the following statements is correct?
(JEE Main 2017)

• A. $T{l}^{+}$ is more stable than $A{l}^{+}$
• B. $T{l}^{3+}$ is more stable than $A{l}^{3+}$
• C. $T{l}^{+}$ is more stable than $A{l}^{3+}$
• D. $A{l}^{+}$ is more stable than $A{l}^{3+}$

Answer 1

The correct option is A $T{l}^{+}$ is more stable than $A{l}^{+}$

$T{l}^{+}$ is more stable than $A{l}^{+}$
$T{l}^{+}$ $|Tl\left(0.34\right)V$ is less negative than $A{l}^{+}|Al(+0.55)V$ or oxidation potenial is more.
$T{l}^{+}$ is weaker oxidizing agent than $A{l}^{+}$