NEETChemistryGeneral Organic Chemistry
What is the chemistry of Lassaigne’s test?
Options
- ALassaigne's test is a method for the detection of the presence of hydrogen ions (H + ) in a given substance. I
- BLassaigne's test is a qualitative test used to detect the presence of halogens (chlorine, bromine, and iodine)
- CLassaigne's test is a procedure for determining the presence of metals in a given sample. It involves heating
- DLassaigne's test is a method for determining the presence of carbonate ions (CO 3 2- ) in a given substance. I
Correct answer
B. Lassaigne's test is a qualitative test used to detect the presence of halogens (chlorine, bromine, and iodine)
Step-by-step solution
Correct Option is : (B) Lassaigne's test is a qualitative test used to detect the presence of halogens (chlorine, bromine, and iodine) and nitrogen in organic compounds. The test involves fusing the organic compound with sodium metal [NA] to form sodium cyanide (NaCN) and sodium halides (NaX), where X represents a halogen. The fused mass is then dissolved in water, and the resulting solution is acidified with dilute nitric acid (HNO 3 ) to liberate the respective halogen acids (HX). These liberated halogen acids ar