Question:
For testing halogens in an organic compound with AgNO3 solution, sodium extract (Lassaigne’s test) is acidified with dilute HNO3. What will happen if a student acidifies the extract with dilute H2 SO4 in place of dilute HNO3?
Solution:
If dilute H2 SO4is added then sodium sulphide and sodium cyanine are not decomposed thereby we will not get the correct result if halides are also present.
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