Question

10. Why do we boil the extract with conc. HNO3 in Lassaigne's test for halogens?
(a) to increase the concentration of NO3-ions
(b) to increase the solubility product of AgCl
(c) it increases the precipitation of AgCl
(d) for the decomposition of Na S and NaCN formed​

Answer 1

Hlo..@ is the Correct ans....increase the concentration of NO3-ions

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