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Q)

For the test of halides, the soda extract is acidified with

(a) Dil. $H_2SO_4$
(b) Dil $HNO_3$
(c) Dil. HCl
(d) None of these

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A)
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Answer: Dil $HNO_3$
 
Sodium carbonate extract is treated with Dil $HNO_3$ to destroy $CO_3^{2-}$ ion and $CN^-$ ions (if present) since both interfere with the test of halides.
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