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Q.

Statement-1: SiO2 is solid while CO2 is gas at room temperature. 

Statement-2: Both Si and C have equal covalency.

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a

Statement-1 is True, Statement-2 is False.

b

Statement-1 is False, Statement-2 is True.

c

Statement-1 is True, Statement-2 is True; Statement-2 is a correct explanation for Statement-1.

d

Statement-1 is True, Statement-2 is True, Statement-2 is NOT a correct explanation for Statement-1.

 

answer is B.

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Detailed Solution

SiO2 forms a network solid.

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Silica is a solid at ambient temperature, but carbon dioxide is a gas.
Both the Si and the C have tetravalency as their covalancy. 

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