Silicones differ from silica by a group of
Correct answer: A. -R
- A. -R
- B. -OH
- C. HCO3⁻
- D. O₂
Explanation
Silicones are polymeric compounds in which silicon atoms are bonded to organic groups, typically alkyl or aryl groups, denoted as -R. This structural feature sets silicones apart from silica, which lacks organic attachments and consists of silicon and oxygen in a network structure. Therefore, the correct answer is -R as it represents the organic groups present in silicones. The other options -OH, HCO3⁻, and O₂ are incorrect because they do not accurately reflect the structural distinction between silicones and silica.
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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.
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