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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:
- Statement I is false but Statement II is true.
- Both Statement I and Statement II are true.
- Statement I is true but Statement II is false.
- Both Statement I and Statement II are false.
Correct answer: Statement I is false but Statement II is true.
Solution
Statement I is incorrect because the α and β forms of sulfur do not interconvert reversibly under normal heating or cooling conditions; they are stable at different temperatures. Statement II is accurate as monoclinic sulfur is indeed the stable form at room temperature.
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