(NH₄)₂Cr₂O₇ $$\buildrel \Delta \over \longrightarrow $$ N₂ + Cr₂O₃ + 4H₂O

Zn(ClO₃)₂ $$\buildrel \Delta \over \longrightarrow $$ ZnCl₂ + 3O₂

KClO₃ $$\buildrel \Delta \over \longrightarrow $$ KCl + $${3 \over 2}$$O₂

2K₂Cr₂O₇ $$\buildrel \Delta \over \longrightarrow $$ 2K₂CrO₄ + Cr₂O₃ + $${3 \over 2}$$ O₂

H₂O does not contain any $$\pi $$-bond.

HClO₄ with highest oxidation number and its conjugate base is resonance stabilised, hence it is most acidic.

Feldspars are three dimensional aluminosilicates.