CO₂ is gas while SiO₂ is solid at room temperature. This is due to
Correct answer: B. CO₂ is an independent molecule while SiO₂ has a network covalent structure
- A. Carbon is non-metal while silicon is semi-metal
- B. CO₂ is an independent molecule while SiO₂ has a network covalent structure
- C. Carbon forms acidic oxide but silicon forms basic oxide
- D. CO₂ and SiO₂ have the same hybridization
Explanation
The correct answer is Option B. CO₂ is a linear molecule composed of discrete units, which are held together by weak van der Waals forces, making it a gas at room temperature. In contrast, SiO₂ forms a continuous network of silicon and oxygen atoms bonded covalently in a three-dimensional lattice. This extensive network structure results in a solid state at room temperature. Option A is incorrect because the metallic character of the elements does not directly influence the state of their oxides. Option C is incorrect as both oxides are acidic. Option D is incorrect because hybridization does not account for the physical state differences.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About s-Block and p-Block Elements
The s and p blocks are studied through their valence-shell configurations, periodic trends and characteristic chemical properties. Work covers the reactions of Group I and Group II elements, the behaviour of Group IV elements, and how atomic size, ionization energy, electronegativity and metallic character change across periods and down groups.
Practise s-Block and p-Block Elements
1,359 free s-Block and p-Block Elements MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemistry questions like this
Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More s-Block and p-Block Elements questions
Which one react most violently with cold water
Tetrachloride of which element doesn't react with water
Indicate the hydroxide which is acid
Which of the following is acidic oxide
Alkali metal exist in form of
Consider the following general characteristics of alkali metal down the groups:I. The atomic and ionic radii increase from Li to Cs with the increasing atomic number due to the addition of new shells. II. Hardness of alkali metals decreases from Li to Cs with decreasing interatomic interactions.III. Melting and boiling points generally decrease from Li to Cs with the decreasing interatomic interactions.IV. Electropositive character increases from Li to Cs with decreasing I.E values.Which of the above statement is correct?