1) $B_{2}H_{6} + O_{2} \to N_{2}O_{3} + B_{2}O_{3} + H_{2}O$

2) $Cr(OH)_{3} + HClO_{4} \to Cr(ClO_{4})_{3} + H_{2}O$

3) $Na_{2}S_{2}O_{3} + I_{2} \to NaI + Na_{2}S_{4}O_{6}$

4) $Al_{2}O_{3} + NaOH + HF \to Na_{3}AlF_{6} + H_{2}O$

5) $Fe_{2}O_{3} + C \to Fe + CO_{2}$

6) $CH_{4} + Cl_{2} \to CHCl_{3} + HCl$

7) $P_{4}O_{10} + I_{2} \to P_{4} + I_{2}O_{5}$

8) $Ca_{5}(PO_{4})_{3}F + H_{2}SO_{4} \to CaSO_{4} + HF + Ca(H_{2}PO_{4})_{2}$