CO2 is a gas while SiO2 is a solid. Why ?
hello Sana, the ans. to ur ques. is--
CO2 exists as a single molecule as it has no d-orbital . It forms p-pi_p-pi bonding due to which it has weak van der waal forces and hence exist as gas at room temp.
SO2 has d-orbital & forms p-pi_d-pi bonding. It exists as bigger 3-D network structures & hence have stronger van der waal forces . Therefore exist as solid at room temp.
Hope this will help u understand.