Group 13 elements

Due to the inert pair effect, the stability of the +1 oxidation state increases down group 13: Al < Ga < In < Tl.

Aluminium is amphoteric. With excess aqueous NaOH it dissolves to form soluble sodium tetrahydroxoaluminate(III) and hydrogen: $2Al + 2NaOH + 6H_2O \rightarrow 2Na[Al(OH)_4] + 3H_2$
$Al(OH)_3$ is not the product, because it is itself soluble in excess NaOH. So this statement is incorrect.
$2NaHCO_3 \xrightarrow{\Delta} Na_2CO_3 + H_2O + CO_2$ (true).
Sodium dissolves in liquid ammonia to give a deep blue solution due to ammoniated electrons: $Na + (x + y)NH_3 \rightarrow [Na(NH_3)_x]^+ + [e(NH_3)_y]^-$ (true).
NaOH attacks the silica of glass: $2NaOH + SiO_2 \rightarrow Na_2SiO_3 + H_2O$ (true).
Hence the incorrect statement is that aluminium reacts with excess NaOH to give $Al(OH)_3$.