Question:medium

Given below are two statements: 
Statement (I): Nitrogen, sulphur, halogen, and phosphorus present in an organic compound are detected by Lassaigne's Test.
Statement (II): The elements present in the compound are converted from covalent form into ionic form by fusing the compound with Magnesium in Lassaigne's test. 
In the light of the above statements, choose the correct answer from the options given below:

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In Lassaigne's Test, the organic compound is fused with sodium metal to detect the presence of elements like nitrogen, sulfur, halogens, and phosphorus by converting them into ionic forms for easy detection.
Updated On: Mar 19, 2026
  • Both Statement I and Statement II are false
  • Both Statement I and Statement II are true
  • Statement I is false but Statement II is true
  • Statement I is true but Statement II is false
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The Correct Option is B

Solution and Explanation

Step 1: Statement (I) is accurate. Lassaigne's test identifies nitrogen, sulfur, halogens, and phosphorus in organic compounds. The process involves fusing the compound with sodium metal, which forms sodium salts of these elements.

Step 2: Statement (II) is also accurate. By fusing the organic compound with sodium or magnesium in Lassaigne's test, the elements are converted into their ionic forms. This facilitates the detection of elements such as nitrogen, sulfur, and halogens.

Therefore, both Statement I and Statement II are true.

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