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Chemistry · p-Block Elements (Group 15-18)

JEE Main 2024 — 9 April, Shift 1 — Question 68

Given below are two statements : one is labelled as Assertion (A) : and the other is labelled as Reason (R).

Assertion (A) : Both rhombic and monoclinic sulphur exist as S8\mathrm{S}_{8} while oxygen exists as O2\mathrm{O}_{2}.

Reason (R) : Oxygen forms pπp \pi - pπ\mathrm{p} \pi multiple bonds with itself and other elements having small size and high electronegativity like C,N\mathrm{C}, \mathrm{N}, which is not possible for sulphur.

In the light of the above statements, choose the most appropriate answer from the options given below :

  1. Option A:

    Both (A) and (R) are correct and (R) is the correct explanation of (A)(\mathbf{A})

  2. Option B:

    Both (A) and (R) are correct but (R) is not the correct explanation of (A)(\mathbf{A}).

  3. Option C:

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

    Correct
  4. Option D:

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

Answer: C

Step-by-step solution

Oxygen can form 2pπ−2pπ2 \mathrm{p} \pi-2 \mathrm{p} \pi multiple bond with itself due to its small size while sulphur cannot form multiple bond with

itself as 3pπ−3pπ3 p \pi-3 p \pi bond will be unstable due to large size of sulphur, but sulphur can form multiple bond with small size

atom like C and N .

eg. S=C=SS=C=S S=C=N−↔S⊖−C≡ N\mathrm{S}=\mathrm{C}=\mathrm{N}^{-} \leftrightarrow \mathrm{S}^{\ominus}-\mathrm{C} \equiv \mathrm{~N}

Answer key and solution verified before publishing.

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Exam
JEE Main 2024
Paper
9 April, Shift 1
Subject
Chemistry
Chapter
p-Block Elements (Group 15-18)
Topic
Introduction & Properties of Group 16: Oxygen Family
Given below are two statements : one is labelled as Assertion (A) … | JEE Main 2024 PYQ with Solution · DhiX AI