Which of the following statements is incorrect

Reaction of Al with excess of NaOH is:

$2\mathrm{Al}+2\mathrm{NaOH}+6{\mathrm{H}}_2\mathrm{O}\to \underset{\begin{array}{c}\text{ Sodium }\\ \text{ tetrahydroxoaluminate}\end{array}}{2\mathrm{Na}\left[\mathrm{Al}(\mathrm{OH}{)}_4\right]+3{\mathrm{H}}_2}$

Heating of NaHCO₃ is:

$2{\mathrm{NaHCO}}_3\stackrel{∆}{\to }{\mathrm{Na}}_2{\mathrm{CO}}_3+{\mathrm{CO}}_2+{\mathrm{H}}_2\mathrm{O}$

Dissolving Na in ammonia.

$\mathrm{Na}+(\mathrm{a}+\mathrm{y}){\mathrm{NH}}_3\to \underset{\mathrm{Blue} \mathrm{color} \mathrm{solution}}{\underbrace{[\mathrm{Na}{\left({\mathrm{NH}}_3\right)}_{\mathrm{a}}{]}^{+}+[\mathrm{e}{\left({\mathrm{NH}}_3\right)}_{\mathrm{y}}{]}^{-}}}$

NaOH reacts with glass to form sodium silicate.

$2\mathrm{NaOH}+{\mathrm{SiO}}_2\rightleftharpoons {\mathrm{Na}}_2{\mathrm{SiO}}_3+{\mathrm{H}}_2\mathrm{O}$