namic bacteria decompose the sludge and produce
Droducer gas
C. water gas
D. biogas
14. These consume human waste
anus
birds
C bacteria
D. silkworms
disease caused by drinking impure water
Basthma
C skin cancer
D. diptheria
16. he waste water from the bathroom can be led into to grow vegetables.
khchen garden C. orchard
D
canals
s saudis
mineral water
C. sewage
D.
(
silt
18 Solidis like faces which settle at the bottom of a large tank during treatment in
B. pond scum
C. emulsion
D. sludge
18. The sludge is decomposed by
symbiotic bacteria
B. anaerobic bacteria
D. nitrogen fixing bacteriin
20 The ultimale source of water is
B. canal
C. river
D. rain
21 The water found below water table is called
spring water B chlorine water C. mineral water
D. fluorine wate
22 uring water by spraying it into sunlight to kill bacteria is
Anspiration
Bitration
Cevaporation
D. aeration
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Answer:
option c
bacteria
option b canal
option d aeration
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