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SSC CHSL 2022 PYQ — Question 29

SSC CHSL - 25 May 2022 - Shift 1 • General Awareness • Q29

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What testing method involves transforming the elements within a compound from a covalent state to an ionic state through fusion with sodium metal?

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Correct answer: D

Explanation

The correct answer is option 4 i.e. Lassaigne’s test.

  • Lassaigne's test is the method that converts elements within a compound from a covalent to an ionic state by fusing it with sodium metal.

  • This technique, named after the French chemist Jean-Baptiste Lassaigne, facilitates the conversion of covalently bonded elements into their ionic forms.

  • By subjecting the compound to fusion with sodium, it forms water-soluble sodium salts of the elements present, enabling the identification of specific elements through subsequent chemical tests.

  • Lassaigne's test is vital in qualitative analysis for detecting the presence of elements like nitrogen, sulfur, and halogens.