WHAT HAPPENS WHEN a) Borax is heated strongly b)Silicon dioxide is reacted with HF c) Silicon is heated with Methyl chloride at high temperature in the presence of copper.

WHAT HAPPENS WHEN a) Borax is heated strongly b)Silicon dioxide is rea

1.	WHAT HAPPENS WHEN a) Borax is heated strongly b)Silicon dioxide is reacted with HF c) Silicon is heated with Methyl chloride at high temperature in the presence of copper.
Answer» TION:(a) Silicon is heated with methyl chloride at HIGH temperature in the presence of copper catalyst at 537 K, methyl substituted chlorosilanes MeSiCl 3 ,Me 2 SiCl 2 ,Me 3 SiCl and Me 4 Si are formed.(b) When silicon dioxide is treated with hydrogen fluoride, first SiF 4 is formed and then hydro fluorosilicic acid is obtained.SiO 2 +4HF→SiF 4 +2H 2 OSiF 4 +2HF→H 2 SiF 6 (C) When CO is heated with ZnO, ZnO is reduced to Zn metal.CO+ZnO Δ CO 2 +Zn(d) When hydrated alumina is treated with aqueous NaOH solution, it dissolves to form SODIUM meta aluminate.Al 2 O 3 .2H 2 O+2NaOH→2NaAlO 2 +3H 2 O