Why nitric acid is added to the sodium fusion extract before the halogen test

1. A.
   Nitric acid
2. B.
   Sodium hydroxide
3. C.
   Hydrochloric acid
4. D.
   Ammonia

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1. A.
   remove unreacted sodium
2. B.
   decompose cyanide or sulphide of sodium
3. C.
   extract halogen from organic compound
4. D.
   maintain the $pH$ of extract

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1. A.
   $AgCN$ is soluble in ${HNO}_{3}$
2. B.
   Silver halides are soluble in ${HNO}_{3}$
3. C.
   ${Ag}_{2}\text{ }S$ is soluble in ${HNO}_{3}$
4. D.
   ${Na}_{2}\text{ }S$ and $NaCN$ are decomposed by ${HNO}_{3}$

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