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 gas given off when NH4Cl is heated with an alkali is?A teenage that had diarrhea after eating…The gas given off when NH4Cl is heated with an alkali is?The alkali metals exhibit similar chemical…