AIPMT-PRELIMS Chemistry Principles Related to Practical Chemistry Class 12 Questions

The Lassaigne's extract is boiled with conc. HNO₃ while testing for halogens. By doing so it.

H₂S gas when passed through a solution of cations containing HCl precipitates the cations of second group of qualitative analysis but not those belonging to the fourth group. It is because:

In borax bead test which compound is formed