AP EAMCET Engineering 2018 Apr 23 Shift 2 Paper

(i) The atomic radius of Al is higher than the atomic radius of Ga. It is due to the presence of greater screening effect in aliuminium. Ga shows poor screening effect.
(ii) Many allotropic forms are shown by boron such as α − rhombohedral, β − rhombohedral and β − tetragonal.
(iii) As we move from top to bottom in a group, melting point decreases. Therefore, Ga shows lowest melting point in group.
Therefore, statements (ii) and (iii) are correct.