alleryIn the Griess-Ilosvay test for nitrite, what produces the red colour?
AA nitroso iron complex
BA starch iodine complex
CA coupled azo dye
DA chromium peroxide
Answer & Solution
Correct answer: C. A coupled azo dye
The diazotised sulphanilic acid couples with 1-naphthylamine to form a red azo dye.
Keep practising Principles Related to Practical Chemistry
Browse all Principles Related to Practical Chemistry questions for NEET UG, or explore more Chemistry topics.
Related questions
At what temperature is aniline diazotised in the azo dye test?In the azo dye test, benzenediazonium chloride couples with beta-naphthol to give:How is the toxic carbylamine destroyed after the test?Which amines give the carbylamine test with chloroform and alcoholic KOH?A carboxylic acid warmed with ethanol and conc. H2SO4 gives a sweet smell due to:What is seen when a carboxylic acid is added to sodium hydrogencarbonate solution?After a Tollens' test, the silver mirror is removed by adding:What forms inside the test tube in a positive Tollens' test?