The Lassiagne's extract is boiled with dil HNO_3 before testing for halogens because,
Select the correct option:
A
AgCN is soluble in $\mathrm{HNO}_3$
B
Silver halides are soluble in $\mathrm{HNO}_3$
C
$\mathrm{Ag}_2 \mathrm{~S}$ is soluble in $\mathrm{HNO}_3$
D
$\mathrm{Na}_2 \mathrm{~S}$ and NaCN are decomposed by $\mathrm{HNO}_3$
✓ Correct! Well done.
✗ Incorrect. Try again or view the solution.
Solution
If nitrogen or sulphur is also present in the compound, the sodium fusion extract is first boiled with concentrated nitric acid to decompose cyanide or sulphide of sodium during Lassaigne's test
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