Electropositive character for the elements of group 13 follows the order

Question

Electropositive character for the elements of group 13 follows the order (A) B > Al > Ga > In > Tl (B) B < Al < Ga < In< Tl (C) B < Al > Ga < In> Tl (D) B < Al > Ga > In> Tl

Tardigrade Admin · Accepted Answer

As we move from B to Al, the sum of ΔiH1 + ΔiH2 + ΔiH3 decreases substantially (6887 kj mol-1 to 5137 kj mol-1) due to increase in the atomic size and hence Al has a high tendency to lose electrons. Since the electrode potentials increase from Al to Tl, therefore, their electropositive character decreases, i.e., Al (- 1.66 V) to Ga (- 0.56 V) to In (- 0.34 V) to Tl (+ 1.26 V) accordingly.

Q. Electropositive character for the elements of group $13$ follows the order

$B > A l > G a > I n > Tl$

$B < A l < G a < I n < Tl$

$B < A l > G a < I n > Tl$

$B < A l > G a > I n > Tl$

Q. Electropositive character for the elements of group 13 follows the order

B>Al>Ga>In>Tl

B<Al<Ga<In<Tl

B<Al>Ga<In>Tl

B<Al>Ga>In>Tl

Q. Electropositive character for the elements of group $13$ follows the order

$B > A l > G a > I n > Tl$

$B < A l < G a < I n < Tl$

$B < A l > G a < I n > Tl$

$B < A l > G a > I n > Tl$