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 ab

Question

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

(A) Statement I is false but Statement II is true
(B) Both Statement I and Statement II are true
(C) Statement I is true but Statement II is false
(D) Both Statement I and Statement II are false

Prashant Kotian · Accepted Answer

Correct answer: B. NO + CH3COOH  HNO2 + CH3COO – NH3.CH3COO – SO3H (Sulphanilic acid solution) N = N—OOCCH3 SO3H + HNO2 + 2H2O N = N – OOCCH3 SO3H Diazotised acid + NH2 1-Naphthyl amine HO3S N = N NH2 + CH3COOH Red azo-dye

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