Refer the given flowchart of sewage treatment, accordingly match Column I with Column II and select the correct answer from the codes given below Column - I Column - II A. The stage in which physical treatment of sewage is done i. Anaerobic digestion of activated sludge and production of biogas B. The stage in which biological treatment ofsewage is done ii. Activated sludge C. Name of the sediment in primary treatment iii. Aeration tanks D. It is carried toaeration tanks from primary settling iv. Primary effluent E. Name of the sediment insecondary treatment v. Primary sludge F. Site of flocs growth vi. Secondary treatment G. Function of sludge digester vii. Primary treatment A B C D E F G 1) vii vi v iv ii iii i 2) i iii v vii ii iv vi 3) i ii iii iv v vi vii 4) vii vi i ii iii iv v

NEET Exam Model Paper 12

Question : 29 of 180

Marks: +1, -0

Refer the given flowchart of sewage treatment, accordingly match Column I with Column II and select the correct answer from the codes given below

Column - I	Column - II
A. The stage in which physical treatment of sewage is done	i. Anaerobic digestion of activated sludge and production of biogas
B. The stage in which biological treatment ofsewage is done	ii. Activated sludge
C. Name of the sediment in primary treatment	iii. Aeration tanks
D. It is carried toaeration tanks from primary settling	iv. Primary effluent
E. Name of the sediment insecondary treatment	v. Primary sludge
F. Site of flocs growth	vi. Secondary treatment
G. Function of sludge digester	vii. Primary treatment

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