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:When the trioxonitrate (IV) salt of an alkali metal…The gas given off when NH4Cl is heated with an alkali is?The longest river in Africa is River?The gas given off when NH4Cl is heated with an alkali is?The alkali metals exhibit similar chemical…