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 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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