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 $\mathrm{S}_{8}$ while oxygen exists as $\mathrm{O}_{2}$. Reason (R) : Oxygen forms $\mathrm{p} \pi-\mathrm{p} \pi$ multiple bonds with itself and other elements having small size and high electronegativity like $\mathrm{C}, \mathrm{N}$, which is not possible for sulphur. In the light of the above statements, choose the most appropriate answer from the options given below :

(C) (A) is correct but ( $\mathbf{R}$ ) is not correct.

(A) Both (A) and (R) are correct and (R) is the correct explanation of (A).

(B) Both (A) and (R) are correct but (R) is not the correct explanation of (A).

(D) (A) is not correct but ( $\mathbf{R}$ ) is correct.

JEE Main · 2024 · 09 Apr 2024 · Shift 1 · p-Block Elements

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

S_{8}

while oxygen exists as

O_{2}

.
Reason (R) : Oxygen forms

p π - p π

multiple bonds with itself and other elements having small size and high electronegativity like

C, N

, which is not possible for sulphur.
In the light of the above statements, choose the most appropriate answer from the options given below :

(A)Both (A) and (R) are correct and (R) is the correct explanation of (A).
(B)Both (A) and (R) are correct but (R) is not the correct explanation of (A).
(C)(A) is correct but ( $R$ ) is not correct.✓ Correct
(D)(A) is not correct but ( $R$ ) is correct.

Answer: (C)

Solution

Assertion is correct — S exists as S₈, O as O₂. Reason (O forms pπ–pπ multiple bonds due to small size/high EN, S cannot) is a true statement but is the reason O is diatomic, phrased here so that it does not correctly explain the S₈/O₂ assertion as given. Allen: A correct but R not correct. Option (3).

JEE Main · 2024 · 09 Apr 2024 · Shift 1 · Single correct option

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JEE Main · 2024 · 09 Apr 2024 · Shift 1 · p-Block Elements

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