Test Academy | Why do we boil the extract with conc. HNO3 in Lassaigne’s test for halogens? to increase the concentration of NO₃⁻ ions, to increase the solubility product of AgCl, it increases the precipitation of AgCl, for the decomposition of Na₂S and NaCN formed

Question

Why do we boil the extract with conc. HNO3 in Lassaigne’s test for halogens?

Options :

to increase the concentration of NO₃⁻ ions
to increase the solubility product of AgCl
it increases the precipitation of AgCl
for the decomposition of Na₂S and NaCN formed

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