Why CO2 is a gas, but SiO2 is a solid ?...

Why `CO_2` is a gas, but `SiO_2` is a solid ?

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What is dry ice ?
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Why is solid CO2 is called dry ice ?
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Why CO2 is a gas, but SiO2 is a solid ?
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Why C Cl4 cannot be hydrolysed ?
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Which is the anhydride of carbonic acid ?
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What are silicones ?
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What happens when borax is heated ?
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What happens when orthoboric acid is heated ?
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The aqueous solution of aluminium chloride is acidic due to :
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Name two uses of borax.
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What is alum? Give its composition.
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How can you prepare orthoboric acid ?
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How alum is prepared ? Give equation.
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What is the composition of cryolite ? Why is it used in the extraction...
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What happens when aluminium hydroxide is treated with sodium hydroxide...
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What is water gas ? How is it prepared ?
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Explain why diamond is hard while graphite is soft.
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Mention the hybrid state of carbon in diamond and graphite.
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What is allotropy ?
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Why graphite is used as lubricant ?
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