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 .