A) increases the concentration of\[NO_{3}^{-}\]ions
B) decomposes \[N{{a}_{2}}S\]and NaCN, if formed
C) helps in the precipitation of AgCl
D) increases the solubility product of AgCl
Correct Answer: B
Solution :
\[N{{a}_{2}}S\]and NaCN are decomposed on heating with HN03 to form H^S and HCN in gaseous phase otherwise they will give precipitate with \[AgN{{O}_{3}}\] \[NaCN+HN{{O}_{3}}\xrightarrow{{}}NaN{{O}_{3}}+HCN\uparrow \] \[N{{a}_{2}}S+2HN{{O}_{3}}\xrightarrow{{}}2NaN{{O}_{3}}+{{H}_{2}}S\]
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