choose the corect answer and clarify in details the reason why you choose it?

For all questions, choose the correct answer in the list and give detailed explanation justify your selection i- The impurities of dissolved gases is removed by 1. Coagulation Treatment 2. Chemical Treatment 3. Aeration Treatment 4. Adsorption Treatment ii- The hardness is usually measured by the 1. Soap Solution Test 2. Jar Test 3. Jackson Turbidimeter 4. Baylis Turbidimeter iii- Which out of the following does not help in disinfecting water? 1. Filtration 2. Chlorine tablets 3. Alums 4. Boiling iv- Select the correct sequence of the treatments or methods which are generally given to treat raw water supplies. 1. Screening, sedimentation, coagulation, filtration, disinfection 2. Screening, sedimentation, disinfection, aeration, coagulation 3. Filtration, sedimentation, coagulation, disinfection IVv: Select the correct sequence of the treatments or methods which are generally given to treat raw water supplies. 1. Screening, sedimentation, coagulation, filtration, disinfection 2. Screening, sedimentation, disinfection, aeration, coagulation 3. Filtration, sedimentation, coagulation, disinfection 4. Sedimentation, screening, disinfection, filtration, coagulation 5. Screening, filtration, coagulation, sedimentation, disinfection VChoose the correct sequence of filtration processes used for sequential removal of particles from coarser (1m) to finer grain sizes. A. Microfiltration B. Ultrafiltration C. Nanofiltration D. Reverse Osmosis Choose the correct answer from the options given below 1. D, C, B, A 2. A, B, C, D D. C. A. B