The stability of the +1 oxidation state increases in the sequence:

1. Al <Ga<In<Tl

2. Tl<In<Ga<Al

3. In<Tl<Ga<Al

4. Ga<In<Al<Tl

Which of the following best explains why the atomic radius of gallium is smaller than that of aluminium?

1. Poor shielding effect of the 2d-electrons

2. Poor shielding effect of the 3d-electrons

3. Poor shielding effect of the 3p-electrons

4. Poor shielding effect of the 2s-electrons

Match the species given in Column I with the properties mentioned in Column II.

Codes:

From the following, the compound(s) that react(s) with \(\mathrm{BF}_3\) is/are :
 

Which of the following elements does not exhibit the inert pair effect?

Which of the following ions acts as the strongest oxidising agent?

1.  ${\mathrm{Tl}}^{3+}$

2.  ${\mathrm{Ga}}^{3+}$

3.  ${\ln }^{3+}$

4.  ${\mathrm{Al}}^{3+}$

Match the species given in Column I with properties given in Column II.

Which of the following represents the correct order of first ionization enthalpy
(ΔᵢH₁, in kJ mol⁻¹) among Group 13 elements?

Which of the following represents the coordination number of Al in aluminate ions?

Select the correct order of atomic radii for the elements of Group 13.

1. B < Al < In < Ga < Tl
2. B < Al < Ga < In < Tl
3. B < Ga < Al < Tl < In
4. B < Ga < Al < In < Tl