Question
The electronegativity of a group 13 element ' E ' is same as that of Ge (on Pauling scale and upto one decimal point). The CORRECT statements about $E^{3 +}$ are
A. It can act as a reducing agent.
B. It can act as an oxidizing agent.
C. $E^{3 +}$ is more stable than $E^{+}$.
D. The standard electrode potential value for $E^{3 +}/E$ is positive.
Choose the correct answer from the options given below
Options
Solution
Sol. [Key Concept: EN $1.8$ identifies E as Tl; Tl$3 +$ is oxidising (inert-pair) while Tl$+$ is more stable, and $E^{\circ}({Tl}^{3 +}/Tl)$ is positive — so statements B and D.]
EN of ' $T\mathcal{l}$ ' is 1.8 that is same as 'Ge'
' E ' $= T\mathcal{l}$
$T\mathcal{l}^{+ 3}$ acts as oxidizing agent
Stability order : $T\mathcal{l}^{+ 3} < T\mathcal{l}^{+ 1}$ (due to inert pair effect)
The standard electrode potential value $E^{\circ}\left( T\mathcal{l}^{3 +}/T\mathcal{l} \right)$
$$= + 1.26\text{ }V $$
Create a free account to view solution
View Solution Free