The correct statements among I to III regarding group 13 element oxides are,
(I) Boron trioxide is acidic.
(II) Oxides of aluminium and gallium are amphoteric.
(III) Oxides of indium and thallium are basic.
(I) and (II) only
(I), (II) and (III)
(I) and (III) only
(II) and (III) only
The alloy used in the contruction of aircrafts is :
Mg-Al
Mg-Mn
Mg-Zn
Mg-Sn
A.
Mg-Al
Due alumin alloy (Mg-Al) is used in manufacturing of aircrafts.