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varsha valli g. (804)

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1)CO2 is a gas but SiO2 is a solid.why?
ans:C does not have vacant d-orbitals and thus cannot form d pie-p pie bond to form a 3D structure.
 
2)C shows extensive catenation but others of the same group do not.why?
ans:C is small in size and the C-Cbond strength is high.but as we go down the group,electro negativity decreases as size increases.thus bond strength decreases and so does the catenation property.
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Varsha be cool, tomorrow is what we make it today, so if u can dream it , u can make it . life is an ice cream ,eat it before it melts away!!!!!!!!! varsha SmileyCentral.com
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