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In the course of purifying water for town supply the water is passed through large...

Chemistry
JAMB 2008

In the course of purifying water for town supply the water is passed through large settlings tanks, containing sodium aluminate (III) to remove?

  • A. large particles
  • B. germs
  • C. fine particles
  • D. odour
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Correct Answer: Option C
Explanation

Potash alum [kAl(S\({O}_4\))\(_2\)] n sodium aluminate (ii) (NaHCO\(_2\)) are added to cause coagulation.

As  fine particles to clump together, forming large particles heavy enough to settle at the bottom of the tanks as impurities.

 

There is an explanation video available below.


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Explanation Video

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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
WAEC offline past questions - with all answers and explanations in one app - Download for free
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
WAEC offline past questions - with all answers and explanations in one app - Download for free
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709