Question

Assertion: Both rhombic and monoclinic sulphur exist as S8 but oxygen exists as O2.
Reason: Oxygen forms pπ – pπ multiple bond due to small size and small bond length but pπ – pπ bonding is not possible in sulphur. [NCERT Exemplar]

Answer 1

Both assertion and reason are true and the reason is the correct explanation for assertion.

What is the difference between rhombic and monoclinic sulfur?

• Both rhombic and monoclinic sulfurs are allotropic forms of sulfur.
• In rhombic form, there are 8 sulfur atoms and it exists as octahedral crystals.
• It is the most stable form of sulfur and exhibits pale yellow color and is also known as α-sulfur.
• On the other hand, monoclinic sulfur is a bright yellow allotrope of sulfur and is also called β- sulfur.
• The rhombic is a stable allotrope of sulfur because it has a stable structure.

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