Q: All of the following about purification of water are true except:
(a) Presence of clostridial spores indicate recent contamination of water
(b) Coliforms must not be detectable in any 100ml sample of water
(c) Sodium thiosulphate is used to neutralize chlorine
(d) Coliforms maybe detected by multiple tube and indole production methods.
A: a. Presence of.....
M11 C55- Water purification
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