E-StoreC Si Ge Sn Pb.............phir se dekho plzzzzzzz
22 May 2007 15:30:53 IST
C Si Ge Sn Pb.............phir se dekho plzzzzzzz
Some points of group 14.....
1) Dry ice (solid CO2) is a molecular solid (vander waal's solid)
2)Anthracite is the purest form of coal while lamp black is the softest
3)Tin is the element having maximum no. of isotopes
4)graphitic acid (C11H4O5) is obtained by oxdn. of graphite with conc. HNO3
5) water gas is also known as blue gas bcoz it burns with a blue flame
6)Quartz is the purest and very common variety of silica
7)Tin is nt attacked by organic acids and used in tinning of utensils
8)carbogen is mixture of 5-10% CO2 and O2 is given to pneumonia patients
it is also given fr CO poisning fr artificial respiration
9)HF is used for etching of glasss
10)ionic character ...
PbF2 >PbCI2 > PbBr2 > PbI2
11)IONISATION ENERGY
C > Si > Ge > Sn < Pb
(this is nt a mistake bt Sn has lowest)
12)Si doesnot form monoxides while all the members of the group form monoxides
13)Talc is pure magnesium silicate 3MgO . 4SiO2 . H2O
14)HCI REACTS WITH SiCI4 to formH2SiCI6
15)WHEN tin is bend , it produces a cracking sound called tin sry due to rubbing of crystals over one another
not copy pasted
self written..........comment if u like it plzz
Comments (13)
28 Sep 2007 20:00:41 IST
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please iv reasn why tin has least..
nd itsreally useful thanks
nd itsreally useful thanks
10 Nov 2008 19:17:49 IST
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yaar u r very helpful goiitian , almost each n every article of yours is ahelpage
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