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civil engineering upsc civil service exam questions
1. Which of the following treatments reduce salinity of water ? 1. Flocculation and sedimentation 2. Filtration 3. Reverse osomasis 4. Electrodialysis Select the correct answer using the codes given below :
(A): 1 and 2
(B): 1 and 4
(C): 2 and 3
(D): 3 and 4
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