JEE Main 2021Chemistryp Block Elements (Group 15, 16, 17 & 18)MediumMCQ

JEE Main 2021 — p Block Elements (Group 15, 16, 17 & 18) Question with Solution

JEE Main 2021 (25 Feb Shift 2)

Question

Given below are two statements:

Statement I : α and β forms of sulphur can change reversibly between themselves with slow heating or slow cooling.

Statement II : At room temperature the stable crystalline form of sulphur is monoclinic sulphur.

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

Choose an option

Show full solutionCorrect option: B
Correct answer
BStatement I is true but Statement II is false.

Step-by-step explanation

α-sulphur⇌<369K>369Kβ-sulphur

at room temperature α-sulphur (Rhombic) is most stable form.

The most stable allotropic form of sulphur is Rhombic sulphur.

Since both rhombic and monoclinic are nonpolar in nature so, they are soluble in non-polar solvents like carbon disulphide (CS2​).
Both rhombic and monoclinic sulphur has the molecular formula S8.​

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About this question

This is a previous-year question from JEE Main 2021, covering the p Block Elements (Group 15, 16, 17 & 18) chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.