A positive brown ring test indicates the presence of? By: Sunday|Published on: Aug 22|Categories: Chemistry WAEC| 0 comments A. NO3 B. Fe3+ C. SO2¯³ D. CU+ E. NO2‾ Correct Answer: Option A – NO3 Users Also Read These:Which reagent is used to test for the presence of…The brown ring observed after the addition of a…Biuret’s test is carried out on a food substance to…The colour that is associated with a positive iodine…Assuming that in sheep, the allele for black coat…SEE ALSO Which of the following substances could be responsible for the banana taste of a food flavour?