Primary treatment of water Secondary treatment of water Tertiary treatment of water A Filteration use of aeration tank use of UV& O_3 B use of oxidation pond use of aeration tank use of chlorine C Sedimentation Anaerobic sludge digester use of O_3 D use of UV& O_3 catalytic converter Activated sludge process Identify the option which correctly describes the above table :-

Correct Answer is : Only B & D are incorrect

NEET 2021 Model Test Paper 4

Question : 112 of 180

Marks: +1, -0

	Primary treatment of water	Secondary treatment of water	Tertiary treatment of water
A	Filteration	use of aeration tank	use of UV& O‌3
B	use of oxidation pond	use of aeration tank	use of chlorine
C	Sedimentation	Anaerobic sludge digester	use of O‌3
D	use of UV& O‌3	catalytic converter	Activated sludge process

Identify the option which correctly describes the above table :-

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