Q. 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 :
A) Statement I is false but Statement II is true
B) Both Statement I and Statement II are true
C) Both Statement I and Statement II are false
D) Statement I is true but Statement II is false
Explanation
[Solution by Dr. Abubacker] Lassaigne's test does detect N, S, halogens and P, so Statement I is true. The compound is fused with sodium metal (not magnesium) to convert the elements into ionic form (NaCN, Na₂S, NaX), so Statement II is false. Answer (4).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.