Subject :NSO Class : Class 9
Natural water is impure and needs to be purified before this water can be supplied to homes for drinking purposes. The sequence of steps involved in purification of water is
A Filtration, sedimentation, decantation and aeration
B Sedimentation, loading, filtration and chlorination
C Chlorination, aeration, sedimentation and filtration
D Chlorination, filtration and distillation.
Ans 1:
Class : Class 10
option b is correct
Ans 2:
Class : Class 10
option b is correct