Given below are two statements. One is labelled as Assertion (A) and the other is labelled as reason (R).

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Both (A) and (R) are true but (R) is not the correct explanation of (A)

Both (A) and (R) are true and (R) is the correct explanation of (A)

Both (A) and (R) are false

(A) is true but (R) is false

answer is D.

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Detailed Solution

Carbon dioxode is a gas while silica is solid at room temperature.

CO₂ (carbon dioxide) does contain C=O bonds. The molecule has two double bonds between the carbon atom and each of the oxygen atoms. The structure of the molecule can be represented as O=C=O, indicating the presence of C=O bonds.

SiO₂ (silicon dioxide), also known as silica, does contain Si=O bonds. The molecule consists of one silicon atom and two oxygen atoms, and each oxygen atom is bonded to the silicon atom by a single bond. However, the overall structure of the molecule can be seen as consisting of SiO₄ tetrahedra, where each silicon atom is at the center of a tetrahedron and is bonded to four oxygen atoms by Si=O bonds.

Therefore, the statement is incorrect for both CO₂ and SiO₂.

So, both (A) and (R) are false.

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