Given below are two statements:
Statement I: Aluminium is more electropositive than thallium as the standard electrode potential value of $E_{A l^3 \mid A l}^{\circ}$ is negative and $E_{T \ell^3 / T t}^{\circ}$ is positive.
Statement II: The sum of first three ionization enthalpies of boron is very high when compared to that of aluminium. Due to this reason boron forms covalent compounds only and aluminium forms $\mathrm{Al}^{3+}$ ion. In the light of the above statements, choose the correct answer from the options given below
Select the correct option:
A
Both Statement I and Statement II are true
B
Both Statement I and Statement II are false
C
Statement I is true but Statement II is false
D
Statement I is false but Statement II is true
✓ Correct! Well done.
✗ Incorrect. Try again or view the solution.
Solution
$$
\begin{aligned}
& \mathrm{E}_{\mathrm{Al}^{3+} / \mathrm{Al}}^{\circ}=-1.66 \mathrm{~V} \\
& \mathrm{E}_{\mathrm{T}^{3+} / \mathrm{Tl}}^{\circ}=+1.26 \mathrm{~V}
\end{aligned}
$$
For B : $\mathrm{IE}_1+\mathrm{IE}_2+\mathrm{IE}_3=801+2427+3659$
$$
=6887 \mathrm{~kJ}
$$
For $\mathrm{AI}=\mathrm{I} \mathrm{E}_1+\mathrm{I} \mathrm{E}_2+\mathrm{I} \mathrm{E}_3=577+1816+2744$
$$
\text { = } 5137 \mathrm{~kJ}
$$
Both statements are true
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