A positive brown ring test indicates the presence of? by Sunday | Aug 22 | Chemistry WAEC | 0 comments A. NO3 B. Fe3+ C. SO2¯³ D. CU+ E. NO2‾ Correct Answer: Option A – NO3 Users Also Read These:In a Biuret test, some protein was mixed with sodium…The persistent Presence of glucose in a person’s…The diameter of a brass ring at 30 °C is 50.0 cm. To…Coliform counts are important in environmental…The brown ring observed after the addition of a…