River contaminated by alkali waste will have a pH of about? by Sunday | Aug 24 | Chemistry WAEC | 0 comments A. 1 B. 3 C. 5 D. 7 E. 9 Correct Answer: Option E – 9 Users Also Read These:The longest river in Africa is River?The nitrogen obtained from air has a density higher…A teenage that had diarrhea after eating…Which of the following pairs of properties of alkali…The gas given off when NH4Cl is heated with an alkali is?