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GK QUESTION#3158

Assertion (A): The space-filling model emphasizes the relative size of each atom based on its van der Waals radius. Reason (R): The van der Waals radius represents the size of an atom only when it forms a covalent bond.

  1. ABoth A and R are true, and R is the correct explanation of A
  2. BBoth A and R are true, but R is not the correct explanation of A
  3. CA is true, but R is falseCorrect answer
  4. DA is false, but R is true
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Answer

C. A is true, but R is false

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Explanation

Space-filling models represent the relative space occupied by atoms using van der Waals radii. A non-bonded van der Waals radius is distinct from a covalent radius inferred from bonded atoms. Thus the assertion is true and the reason is false.

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