Why is the Lassaigne's extract boiled with concentrated $HNO_3$ before testing for halogens?

  • A
    To increase the concentration of $NO_3^-$ ions.
  • B
    To decompose $Na_2S$ and $NaCN$ formed during the fusion process.
  • C
    To help in the crystallization of $AgCl$.
  • D
    To increase the solubility product of $AgCl$.

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