JEE Main 202628 JanuaryMorning Shift
- Exam
- JEE Main
- Year
- 2026
- Date
- 28 January
- Shift
- Morning Shift
- Subject
- Chemistry
- Chapter
- Amines
JEE Main 2026 · 28 January · Morning Shift · Chemistry · Amines
Given below are two statements: Statement I : Griss-Ilosvay test is...
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 -naphthylamine reagent.
Statement II: In the above test, sulphanilic acid is diazotized by the acidified nitrite ion, which on further coupling with -naphthylamine forms an azo-dye.
In the light of the above statements, choose the correct answer from the options given below
Statement I: Griss-Ilosvay test is used for the detection of nitrite ion, which involves the use of sulphanilic acid and -naphthylamine reagent.
Statement II: In the above test, sulphanilic acid is diazotized by the acidified nitrite ion, which on further coupling with -naphthylamine forms an azo-dye.
In the light of the above statements, choose the correct answer from the options given below
Options
- ABoth Statement I and Statement II are true
- BBoth Statement I and Statement II are false
- CStatement I is false but Statement II is true
- DStatement I is true but Statement II is false
Correct answer
A. Both Statement I and Statement II are true
Step-by-step solution
The Griss-Ilosvay test for nitrite ion detection involves adding sulphanilic acid and -naphthylamine reagent. Acidified nitrite ions diazotize sulphanilic acid, forming a diazonium salt that undergoes azo coupling with -naphthylamine to produce a characteristic red azo-dye. Both statements accurately describe this test and its mechanism, making both statements true.