AIIMS 2018 Chemistry Covalent Character MCQ Question
Assertion: SO₂ is more covalent than SeO₂ Reason: Covalent radius of Se is more than S
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Correct Answer
Detailed Explanation
The assertion that SO₂ is more covalent than SeO₂ is true because sulfur (S) has a smaller atomic radius and higher electronegativity compared to selenium (Se), leading to stronger covalent character in SO₂. However, the reason provided, that the covalent radius of Se is greater than that of S, is true but does not directly explain why SO₂ is more covalent; it merely states a fact about atomic size. Other options are incorrect because option A implies the reason correctly explains the assertion, while options C and D incorrectly classify the truth of the assertion and reason. Understanding the relationship between atomic size, electronegativity, and covalent character is crucial in comparing molecular compounds.
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