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varshavallig (798)

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Olaaa!! Perrrfect answer. 136  [195 rates]

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hi
 
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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