In case, nitrogen and sulphur both are present in an organic compound, sodium thiocyanate is formed. It gives blood red colour and no Prussian blue since there are no free cyanide ions.
Na+C+N+S→NaSCN
Fe3++SCN−→[Fe(SCN)]2+BloodredNa+NaCNS→Na2S+NaCN
Given below are two statements : Statement I : In 'Lassaigne's Test', when both nitrogen and sulphur are present in an organic compound, sodium…
JEE Main 2022 — Chemistry Organic Chemistry
2022mcqmedium
Given below are two statements :
Statement I : In 'Lassaigne's Test', when both nitrogen and sulphur are present in an organic compound, sodium thiocyanate is formed.
Statement II : If both nitrogen and sulphur are present in an organic compound, then the excess of sodium used in sodium fusion will decompose the sodium thiocyanate formed to give NaCN and Na2S.
In the light of the above statements, choose the most appropriate answer from the options a: given below
Official previous-year question
Held on 26 Jun 2022 · Verified 6 Jul 2026.
Options
- A
Both Statement I and Statement II are correct.
- B
Both Statement I and Statement II are incorrect.
- C
Statement I is correct but Statement II is incorrect.
- D
Statement I is incorrect but Statement II is correct.
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