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JEE MainChemistryp Block Elements (Group 15, 16, 17 & 18)

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Nitrogen exists as a diatomic gas ( N ₂ ) whereas phosphorus exists as a solid tetra-atomic molecule ( P ₄ ) at room temperature. Reason (R) : Phosphorus cannot form any type of multiple bonds due to its large atomic size, whereas nitrogen forms strong p - p multiple bonds with itself. In the lig

Options

  1. ABoth (A) and (R) are correct and (R) is the correct explanation of (A)
  2. B(A) is correct but (R) is not correct
  3. CBoth (A) and (R) are correct but (R) is not the correct explanation of (A)
  4. D(A) is not correct but (R) is correct

Correct answer

B. (A) is correct but (R) is not correct

Step-by-step solution

Assertion (A) is correct. Nitrogen exists as a diatomic gas ( N ₂ ) with a triple bond, while phosphorus exists as a discrete tetra-atomic molecule ( P ₄ ) with single bonds at room temperature. Reason (R) is incorrect. While it is true that phosphorus cannot form effective p - p multiple bonds with itself due to its larger atomic size, the statement claims it cannot form any type of multiple bonds. Phosphorus has vacant d-orbitals and can readily form d - p multiple bonds with smaller, highly electronegative atoms

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