The Griss-Ilosvay test for nitrite ion detection involves adding sulphanilic acid and α-naphthylamine reagent. Acidified nitrite ions diazotize sulphanilic acid, forming a diazonium salt that undergoes azo coupling with α-naphthylamine to produce a characteristic red azo-dye. Both statements accurately describe this test and its mechanism, making both statements true.
Given below are two statements: Statement I: Griss-Ilosvay test is used for the detection of nitrite ion, which involves the use of sulphanilic acid…
JEE Main 2026 — Chemistry Organic Chemistry
2026mcqmedium
Given below are two statements:
Statement I: Griss-Ilosvay test is used for the detection of nitrite ion, which involves the use of sulphanilic acid and α-naphthylamine reagent.
Statement II: In the above test, sulphanilic acid is diazotized by the acidified nitrite ion, which on further coupling with α-naphthylamine forms an azo-dye.
In the light of the above statements, choose the correct answer from the options given below
Official previous-year question
Held on 28 Jan 2026 · Verified 6 Jul 2026.
Options
- A
Both Statement I and Statement II are true
- B
Both Statement I and Statement II are false
- C
Statement I is false but Statement II is true
- D
Statement I is true but Statement II is false
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