Which of the following compound is added to the sodium extract before addition of silver nitrate for testing of halogens?
Select the correct option:
A
Nitric acid
B
Ammonia
C
Hydrochloric acid
D
Sodium hydroxide
✓ Correct! Well done.
✗ Incorrect. Try again or view the solution.
Solution
For testing of halogens, Nitric acid is added to the sodium extract because if $\mathrm{CN}^{-}$or $\mathrm{S}^{2-}$ are present then they will be oxidised and removed before the test of halides.
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