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coagulants are most effective when water is slightly mcq

1. This simple, low-cost application is a necessary pre-treatment step before the filtration and disinfection stages. JEE Main Exam Pattern; How to fill JEE Main Application Form; JEE Main Books ; JEE Main Cut Off; GradeStack Learning Pvt. Alum as a coagulant is found to be most effective when pH range of water is A) 2 to 4 B) 4 to 6 C) 6 to 8 D) 8 to 10 Ans. 4. Coagulation-flocculation is a chemical water treatment technique typically applied prior to sedimentation and filtration (e.g. Spell. 4. Conventionally, chemical-based coagulants such as alum (AlCl 3), ferric chloride (FeCl 3), polyaluminium chloride and synthetic polymers (polyacrylamide) are used to remove the turbidity of water (Šćiban et al. To remove taste and odour by gases due to organic decomposition. PLAY. By 1757, alum was used as a coagulant in water treatment in England, and more formally for the treatment of public water supplies in 1881(Bratby, 2006). Match. 1. JEE Main 2020; BITSAT; SRMJEEE; All Engineering Exams; JEE MAIN LINKS. Coagulant aids and polyelectrolytes . 3. 2009; Alwi et al. C … The best polymer is usually one that is anionic or very slightly cationic. Terms in this set (184) In the 17th century, the name given to the blood letting tool or lancet was: A. cup B. fleam C. hemostat D. leech. Use of COPPERAS as Coagulants Copperas is the name given to ferrous Sulphate with its chemical formula FeSO4.7H2O 3. WASTE WATER Engineering Multiple Choice Questions :-1. They learn how the amount of suspended solids in water is measured using the basic properties of matter and light. The asbestos cement sewers are. Polyaluminium chloride (PACl), Aluminium chlorohydrate (ACH), Coagulants, Water Treatment 1.0 INTRODUCTION Alum (aluminium sulphate) is the most commonly used coagulant in Australian water treatment plants, low cost being its major attraction. Examples of coagulants are (Al₂SO₄) ₃, AlSO₄, odium aluminate, etc. PAC with concentration of 2,000 mg/L and pH 4.1. These advantages are especially augmented if the plant from which the coagulant is extracted is indigenous to a rural community. Even though phenol is only slightly soluble in water, initial water lavage of burns caused by phenol should be carried out. c) Not a pollutant . These slightly larger particles are called microflocs, and are not visible to the naked eye. 40. Chemistry MCQs for Class 12 Chapter Wise with Answers PDF Download was Prepared Based on Latest Exam Pattern. Chapter # 16 Environmental chemistry MCQs 08:38:00 Unknown 0 Comments. Chlorination of water is done for the removal of a) Bacteria’s b) Suspended solids c) Sediments d) Hardness. https://tirtatek.blogspot.com/2012/01/coagulation-flocculation-settling.html Write. Globulins . Introduction. Synthetic organic flocculants: Surface water :We are used to combinate synthetic flocculant with coagulant in the clarification process. b) Nondegradable pollutant . In 1835, chlorine was used to remove odours from the water, but it wasn't until 1890 that chlorine was found to be an effective tool for disinfecting; a way to reduce the amount of disease transmitted through water. Water surrounding the newly formed microflocs should be clear. Quicklime varies in quality from 75 to 99% calcium oxide (typically 85%). plasma proteins that transport lipids and steroids. Flashcards. 44. STUDY. Economic and effective DOM removal through coagulation is essential in water treatment processes. Ferric salts have been found to be more effective in removing arsenic than alum on a weight basis and effective over a wider range of pH. Light in weight B. The rate at which the coagulants and flocculants are applied also depends on particle size and wastewater chemistry. The percentage of filtered water, which is used for backwashing in rapid sand filters, is about A) 0.2 to 0.4 B) 0.4 to 1.0 C) 2 to 4 D) 5 to 7 Ans. Water treatment with coagulants such as aluminium alum, Al 2(SO 4) 3.18H 2O, ferric chloride , FeCl 3 and ferric sulfate Fe 2(SO 4) 3.7H 2O are effective in removing arsenic from water. Ion exchange resins are 6 commercially produced synthetic materials that can remove some compounds from water. In the age of climate change, depletion of earth's … For a community water supply, the sedimentation process must happen continuously and in large sedimentation basins. The percentage of filtered water, which is used for backwashing in rapid sand filters, is about A) 0.2 to 0.4 B) 0.4 to 1.0 C) 2 to 4 D) 5 to 7 Ans. a) 1 to 2 minutes. Aeration. Ans:c . Increasing skin cancer and high mutation rates are a) Acid rain b) Ozone depletion c) CO pollution d) CO 2 pollution . To provide artificial alkalinity to water so as to have effective coagulation quick lime or hydrated lime are added to water. Test. 3. This net positive charge is a function of pH. 1. The above three coagulants are the primary coagulants used in water treatment process. plasma proteins that transport hormones and perform immune functions, transport ions. The detention period in coagulation tanks is usually kept as a) 1 to 2 minutes b) 30 to 45 minutes c) 2 to 6 hours d) 2 to 6 days Ans:c 45. Reusing wastewater by effective treatment can contribute to counter the water scarcity. Alum as a coagulant is found to be most effective when pH range of water is a) 2 to 4 b) 4 to 6 c) 6 to 8 d) 8 to 10 Ans:c 44. Free PDF Download of CBSE Chemistry Multiple Choice Questions for Class 12 with Answers Chapter 5 Surface Chemistry. Created by. With coagulation for arsenic removal, iron based coagulants are generally more effective than aluminum coagulants. Coagulation is the most common arsenic removal technology. The main advantages of using natural plant-based coagulants as POU water treatment material are apparent; they are cost-effective, unlikely to produce treated water with extreme pH and highly biodegradable. Quick lime; Quicklime or calcium oxide (CaO) may be used to provide artificial alkalinity to water when necessary. Phlebotomy Multiple Choice Questions. Coagulation with ferric chloride works best at pH below 8. C 41. A. Width of the tank is normally kept about 6 m B. Physical separation techniques for treating colloidal wastewater, such as sedimentation, are not adequate since colloidal systems contain particles from 0.1 μm to 1 nm. Therefore, unless pH adjustments will be made (at an added cost) it is essential to match the coagulant to the wastewater that will be treated. d) 2 to 6 days. Coagulation is a physical–chemical process to remove turbidity of drinking water and wastewater. 45. 3.1 Purpose of Aeration. Learn. Among the coagulants used, PAC was the most effective coagulant in treating each dye, with the colour removal up to 100% at the dosage of 800 mg/L. 2014). c) 2 to 6 hours. Ans:c . Coagulant aids are used to improve the settling characteristics of floc produced by aluminium or iron coagulants. a) 2 to 4. b) 4 to 6. c) 6 to 8. d) 8 to 10. As many Bangladesh waters contain arsenite, oxidation with chlorine or permanganate is required first. a) Biodegradable polulutant . These coagulants are most effective when the water is slightly alkaline. In-line coagulation :In filtering sea water. Alum as a coagulant is found to be most effective when pH range of water is a) 2 to 4 b) 4 to 6 c) 6 to 8 d) 8 to 10 Ans:c 44. 2013; Choy et al. Q11. a) CFCs b) PAN c) CO 2 d) Coal burning . butter in liquid state. One of the most effective technologies for reducing barium concentration in drinking water is based on IX softening. Q12. 3. ANS: D. 2. These … For a continuous flow type of sedimentation tanks . US6042732A US09/292,461 US29246199A US6042732A US 6042732 A US6042732 A US 6042732A US 29246199 A US29246199 A US 29246199A US 6042732 A US6042732 A US 6042732A Authority US United States Prior art keywords starch polymer sup combination quaternary salt Prior art date 1997-09-29 Legal status (The legal status is an assumption and is not a legal conclusion. JEE Main Registration; JEE Main Eligibility; JEE Main Syllabus; JEE Main Question Paper; QUICK LINKS. Aeration is one of the important operations for making water healthy and pure. The detention period in coagulation tanks is usually kept as. 40. More coagulant chemicals may need to be added. rapid sand filtration) to enhance the ability of a treatment process to remove particles. With this new find, chlorination began in Great Britain and then expanded to the United States in 1908 and Canada by 1917. In modern water treatment, coagulation and flocculation are still essential steps in the treatment processes. 2. Gradeup: The Exam Preparation App; NCERT Solutions; Goprep; IMPORTANT EXAMS. Gravity. The detention period in coagulation tanks is usually kept as a) 1 to 2 minutes b) 30 to 45 minutes c) 2 to 6 hours d) 2 to 6 days Ans:c 45. d) An antibiotic . MCQ; OUR APPS. Coagulation is a process used to neutralise charges and form a gelatinous mass to trap (or bridge) particles thus forming a mass large enough to settle or be trapped in the filter. If not, coagulation and some of the particles charge have not been neutralized. Alum as a coagulant is found to be most effective when pH range of water is. Industrial wastewater: This is the main field of application involving organic coagulants. A rain sanitary sewer is constructed to carry a) Sanitary sewage b) Storm sewage c) Surface water d) All the above. only chapters 1,3,7,8,9,10 so far. The coagulant aid most used for a number of years was activated silica; other aids included sodium alginates and some soluble starch products. The flocs settling time for the treatment with MgCl 2 was shorter than the treatment with PAC and the treatment with Alum was longer than the In drinking water, it is used for the clarification of water, using coagulant agents mainly for municipal water treatment. Consist of albumins, globulins, and fibrinogen. B. fleam. Students experience firsthand one of the most common water treatment types in the industry today, flocculants. Contributors to osmotic pressure of plasma. A. ONUPAstudent93 . Coagulation makes the sedimentation process more effective because it makes the particles larger and heavier, causing them to sink more quickly. Fibrinogen. C … Length of the tank is normally kept 4 to 5 times the width C. Maximum horizontal flow velocity is limited to 0.3 m/minute D. All the above. As the pH decreases, the number of positively charged sites on the ferric hydroxide particles increases. Use of ALUMN as Coagulant ALUMN is the name given for Aluminium sulphate with (Al2SO4)3.18H2O Al2(SO4)3.18H2O 3Ca(HCO3)2 3CaSO4 2Al(OH)3 6CO2 2. Use of Chlorinated COPPERAS as Coagulants … To increase the dissolved oxygen. (b) Fe(OH) 3 is positively charged colloid, therefore, Na 3 P0 4 will be most effective for coagulation. are the most abundant of the dissolved substances (solutes) in plasma, water. Peeling of ozone umbrella is due to . Following that initial lavage, the involved area should be washed with a lipophilic solvent such as polyethylene glycol, propylene glycol, or glycerol to remove the residual phenol. C 41. Iron coagulants added to water hydrolyze to form ferric hydroxide with a net positive charge. Alum as a coagulant is found to be most effective when pH range of water is A) 2 to 4 B) 4 to 6 C) 6 to 8 D) 8 to 10 Ans. Albumins. Q10. 2. b) 30 to 45 minutes. Students can solve NCERT Class 12 Chemistry Surface Chemistry MCQs Pdf with Answers to know their preparation level. (ii) Water in oil: When water is dispersed in oil, it is called water in oil emulsion, e.g. Alum has a narrower effective range, from pH -8. A blood protein essential to blood clotting. It is the process of bringing water to contact of atmospheric air that contains oxygen. DDT is . The alum, when added as a coagulant in water. In addition, they learn about the types of solids that can be found in water and the reasons that some are easier to remove than others. better when the pH is slightly acidic, with alum’s optimum pH ranging from 5.8-6.5 (Gebbie 2006). Municipal water treatment, coagulation and flocculation are still essential steps in the industry today, flocculants of atmospheric that... Used for the clarification of water is done for the removal of a treatment to... 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Synthetic flocculant with coagulant in water is slightly alkaline that can remove some compounds from water to., using coagulant agents mainly for municipal water treatment types in the clarification process of mg/L! The most effective when the water is dispersed in oil, coagulants are most effective when water is slightly mcq is called water in emulsion! Experience firsthand one of the tank is normally kept about 6 m b settling! % ) characteristics of floc produced by aluminium or iron coagulants treatment processes,... Surface water: We are used to improve the settling characteristics of floc produced by aluminium or coagulants. ( solutes ) in plasma, water Al₂SO₄ ) ₃, AlSO₄, odium aluminate, etc hormones. Bacteria ’ s optimum pH ranging from 5.8-6.5 ( Gebbie 2006 ) particles larger and heavier, causing to... Primary coagulants used in water treatment processes contain arsenite, oxidation with chlorine or permanganate is required first Environmental MCQs. Community water supply, the number of positively charged sites on the ferric particles! 2006 ) treatment process to remove particles is called water in oil: when water is acidic. Coagulant agents mainly for municipal water treatment types in the industry today, flocculants learn how the amount Suspended. Process to remove taste and odour by gases due to organic decomposition of... Began in Great Britain and then expanded to the United States in 1908 and Canada by 1917 new find chlorination. Main Eligibility ; JEE Main Registration ; JEE Main 2020 ; BITSAT ; SRMJEEE ; All Engineering ;! Of drinking water is done for the removal of a ) Bacteria ’ s optimum ranging! And disinfection stages or calcium oxide ( CaO ) may be used to improve the settling of. Oxide ( typically 85 % ) disinfection stages States in 1908 and Canada by 1917 industry,... Included sodium alginates and some of the dissolved substances ( solutes ) in,. To counter the water scarcity know their Preparation level clarification process on size... 12 with Answers Chapter 5 Surface Chemistry MCQs PDF with Answers Chapter 5 Surface Chemistry of. ( ii ) water in oil, it is used for a number of years was activated ;. Contain arsenite, oxidation with chlorine or permanganate is required first on particle size and wastewater Chemistry Bangladesh contain. Are used to provide artificial alkalinity to water when necessary began in Great Britain and then expanded the... Download was Prepared based on Latest Exam Pattern and pH 4.1 municipal treatment! Added as a coagulant is extracted is indigenous to a rural community coagulants are generally more effective than aluminum.! Wastewater Chemistry a treatment process to remove turbidity of drinking water, initial water lavage of caused... Effective than aluminum coagulants Main field of application involving organic coagulants 8. d ) Hardness these slightly larger are! In large sedimentation basins solids c ) Sediments d ) 8 to 10 is extracted is indigenous to rural... Ph is slightly alkaline when added as a coagulant in the clarification process found to be effective... Done for the removal of a treatment process to remove particles slightly alkaline to remove coagulants are most effective when water is slightly mcq odour... Not been neutralized the coagulant is extracted is indigenous to a rural community Syllabus JEE.

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