Fullerence Fullerence was discovered collectively by three scientists namely R. E Smalley, R. F Curl and H. W Kroto
SOME Important Compounds Of Carbon and Silicon
Carbon monoxide:-It I prepared by direct oxdisation of C in limited supply of oxygen.
2C + O2( g) → 2CO( g)
Commercially it is prepared by the passage of steam over hot coke
Carbon Dioxide:-It is prepared by complete combustion of carbon and carbon fuels in excess of air.
C( s) + O2( g) → CO2( g) Laboratory method:- In laboratory it is prepared by the treatment of dilHCl on CaCO3
CaCO3( s) + 2HCl( aq) → CaCl2( aq) + CO2( g)+ H2O( l)
Silicon dioxide:-Silicon dioxide is a COVALENT THREE DIMENSIONAL NETWORK SOLID.
Each silicon atom is covalently bonded in a tetrahedral manner to four oxygen atoms.
Silicones:-Silicones are the synthetic organo- silicon polymers having general formulae( R2SiO) n in which R = alkyl( methyl, ethyl or phenyl)
Silicates:-Silicates are exist in nature in the form of feldspar, zeolites, mica and asbestos etc.
The basic structure of silicates is SiO4 4-
Zeolites:-Zeolites is aalumino- silicate of metal. Metal cations participating in formation of Zeolite are use usually Na +, K +, or Ca 2 +.
Zeolites are used to remove permanent hardness of water.