Question

Assertion (A) Both rhombic and monoclinic sulphur exist as $S_8$ but oxygen exists as $O_2$.
Reason (R) Oxygen forms $p\pi -p\pi$ multiple bond due to small size and small bond length but $p\pi$ - $p\pi$ bonding is not possible in sulphur.

• A. Both $A$ and $R$ are correct; $R$ is the correct explanation of $A$.
• B. Both $A$ and $R$ are correct; $R$ is not the correct explanation of $A$.
• C. $A$ is correct; $R$ is incorrect.
• D. $R$ is correct; $A$ is incorrect.

Answer 1

Answer: (A)

Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
Both rhombic and monoclinic sulphur exist as $S_8$ but oxygen exists as $O_2$, because oxygen forms $p\pi -p\pi$ multiple bond due to its small size and small bond length. But $p\pi -p\pi$ bonding is not possible in sulphur due to its bigger size as compared to oxygen.