Post-UTME General Knowledge (Current Affairs) 2017 Objective — Question 25

Question 25 of 50 from the Post-UTME Screening (Post-UTME) General Knowledge (Current Affairs) 2017 Objective paper, with the correct answer and a full explanation.

For purifying drinking water alum is used

A. for coagulation of mud particlesCorrect
B. to kill bacteria
C. to remove salts
D. to remove gases

Explanation

Alum causes fine particles to clump together (coagulate) and settle out of water.

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