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:If the silver mirror test is positive; it indicates…The presence of a large member of mitochondria in a…Coliform counts are important in environmental…When a solution of ammonium trioxocarbonate (IV) is…The persistent Presence of glucose in a person’s…