At 25°C CO₂ Is a Gas and SiO₂ Is a High-Melting

question 42

Multiple Choice

At 25°C CO₂ is a gas and SiO₂ is a high-melting solid.In these compounds of oxygen

• A)both carbon in CO₂ and silicon in SiO₂ are π-bonded to two oxygen atoms.
• B)both carbon in CO₂ and silicon in SiO₂ are σ-bonded to four oxygen atoms.
• C)carbon in CO₂ is π-bonded to two oxygen atoms and silicon in SiO₂ is σ-bonded to four oxygen atoms.
• D)silicon in SiO₂ is π-bonded to two oxygen atoms and carbon in CO₂ is σ-bonded to four oxygen atoms.

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