Question: PLEASE ANSWER QUESTION FULLY AND COMPREHENSIVELY. a) What are colloids? Why are colloidal particles resistant to settling by gravity? How is the intensity of a

 PLEASE ANSWER QUESTION FULLY AND COMPREHENSIVELY. a) What are colloids? Why

PLEASE ANSWER QUESTION FULLY AND COMPREHENSIVELY.

a) What are colloids? Why are colloidal particles resistant to settling by gravity? How is the intensity of a colloidal suspension measured and what are the units of expression? [10] b) The prevalent infectious diseases are giardiasis and cryptosporidiosis, causing diarrhea that can be life-threatening for persons with immunodeficiency syndrome. What actions are being taken to reduce the probability of waterborne transmission of these diseases? [10]

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