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Q.

Which of the following compound is added to the sodium extract before addition of silver nitrate for  testing of halogens?

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a

Ammonia

b

Nitric acid

c

Hydrochloric acid

d

Sodium hydroxide

answer is B.

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Detailed Solution

HNO3is added to sodium fusion extraction before addition of for testing halogesn becomes  HNO3 oxidize the any impurities like N, S, present, they can be oxidized.
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