Question

Given below are two statements :
Statement I :
$\alpha and\beta$ 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:

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• A. Statement I is false but Statement II is true.
• B. Both Statement I and Statement II are false.
• C. Statement I is true but Statement II is false.
• D. Both Statement I and Statement II are true.

Answer 1

The correct option is C Statement I is true but Statement II is false.

Sulphur mainly exists in two allotropic forms: Rhombic and Monoclinic.
The stable form at room temperature is rhombic sulphur(yellow in color), which is transformed to monoclinic sulphur on heating at $369K$.
$\alpha and\beta$ form of sulphur can change reversibly between themselves with slow heating or slow cooling.