1.

CO_(2) exists in the gaseous state, whereas SiO_(2) is a hard solid though both carbon and silicon belong to the same group. Give reasons.

Answer»

SOLUTION :(i) comparison of size of CARBON and silicon
(ii) effect of size of carbon and silicon on the nature of bond present in `CO_(2)` and `SiO_(2)`
(III) INFLUENCE of nature of bonds on the structure of the molecules
(iv) relation between the structure of the substance and physical state of matter


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