Iron & manganese present as pollutant in water cannot be removed by (A) Ion exchange process (B) Oxidation followed by settling & filtration (C) Lime soda process or manganese zeolite process(D) Chlorination

Iron & manganese present as pollutant in water cannot be removed by
(A) Ion exchange process
(B) Oxidation followed by settling & filtration
(C) Lime soda process or manganese zeolite process
(D) Chlorination
by

1 Answer

Answer :

(D) Chlorination
by

Related questions

Iron and manganese present as pollutants in water cannot be removed by_____ (1) oxidation followed by settling and filtration (2) chlorination (3) ion exchange process (4) lime soda process or manganese zeolite process

Description : Iron and manganese present as pollutants in water cannot be removed by_____ (1) oxidation followed by settling and filtration (2) chlorination (3) ion exchange process (4) lime soda process or manganese zeolite process

Last Answer : chlorination

Iron and manganese present as pollutants in water cannot be re-moved by - (1) oxidation followed by settling and filtration (2) chlorination (3) ion exchange process (4) lime soda process or manganese zeolite process

Description : Iron and manganese present as pollutants in water cannot be re-moved by - (1) oxidation followed by settling and filtration (2) chlorination (3) ion exchange process (4) lime soda process or manganese zeolite process

Last Answer : (2) chlorination Explanation: Water chlorination is the process of adding chlorine or hypochlorite to water. This method is used to kill certain bacteria and other microbes in tap water as chlorine is ... is used to prevent the spread of waterborne diseases such as cholera, dysentery, typhoid etc.

Iron & manganese present in the polluted water is removed by (A) Simple filtration (B) Oxidation followed by settling & filtration (C) Chemical coagulation (D) Chlorination only

Description : Iron & manganese present in the polluted water is removed by (A) Simple filtration (B) Oxidation followed by settling & filtration (C) Chemical coagulation (D) Chlorination only

Last Answer : (B) Oxidation followed by settling & filtration

Suspended solid present in the waste water generated in blast furnace gas cooling and cleaning plant is removed by (A) Biological oxygen pond (B) Radial settling tank (thickener) using coagulant (lime & ferrous sulphate) (C) Lagoons (D) Filtration

Description : Suspended solid present in the waste water generated in blast furnace gas cooling and cleaning plant is removed by (A) Biological oxygen pond (B) Radial settling tank (thickener) using coagulant (lime & ferrous sulphate) (C) Lagoons (D) Filtration

Last Answer : (B) Radial settling tank (thickener) using coagulant (lime & ferrous sulphate)

__________ is removed from water by lime-soda process. (A) Foul smell and taste (B) Iron and manganese (C) Temporary hardness (D) Permanent hardness

Description : __________ is removed from water by lime-soda process. (A) Foul smell and taste (B) Iron and manganese (C) Temporary hardness (D) Permanent hardness

Last Answer : (C) Temporary hardness

Consider the following statements: 1. Carbonate hardness is due to bicarbonates. 2. Non-carbonate hardness is due to sulphates and chlorides of Ca and Mg. 3. Both the hardnesses can be removed by lime-soda method. 4. Both the hardnesses can be removed by ion-exchange method. Which of these statements are correct? (a) 1, 2 & 3 only (b) 1, 2 & 4 only (c) 2, 3 & 4 only (d) 1, 2, 3 & 4

Description : Consider the following statements: 1. Carbonate hardness is due to bicarbonates. 2. Non-carbonate hardness is due to sulphates and chlorides of Ca and Mg. 3. Both the hardnesses can be removed by lime-soda method. 4. Both the hardnesses can be ... (b) 1, 2 & 4 only (c) 2, 3 & 4 only (d) 1, 2, 3 & 4

Last Answer : (a) 1, 2 & 3 only

Radioactive substances present in the polluted water stream can be removed by (A) Biological oxygen treatment (B) Coagulation and filtration (C) Adsorption in ion exchange materials (D) None of these

Description : Radioactive substances present in the polluted water stream can be removed by (A) Biological oxygen treatment (B) Coagulation and filtration (C) Adsorption in ion exchange materials (D) None of these

Last Answer : (C) Adsorption in ion exchange materials

Permanent hardness of water can be removed by (A) Adding alum (B) Adding lime (C) Adding chlorine (D) Zeolite process

Description : Permanent hardness of water can be removed by  (A) Adding alum  (B) Adding lime  (C) Adding chlorine  (D) Zeolite process

Last Answer : (D) Zeolite process

The commonest form of iron & manganese found in ground water as pollutant is in the form of their (A) Carbonates (B) Bi-carbonates (C) Chlorides (D) Sulphides

Description : The commonest form of iron & manganese found in ground water as pollutant is in the form of their (A) Carbonates (B) Bi-carbonates (C) Chlorides (D) Sulphides

Last Answer : (B) Bi-carbonates

Impurities present in brine is normally removed by treatment with(A) NH3 and CO2(B) Lime and soda ash(C) Lime, ammonia and carbon(D) All (A), (B) and (C)

Description : Impurities present in brine is normally removed by treatment with (A) NH3 and CO2 (B) Lime and soda ash (C) Lime, ammonia and carbon (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)

Temporary hardness of water can be removed by (A) Addition of alum (a coagulant) (B) Boiling (C) Filtration (through gravity sand filter) (D) Addition of lime

Description : Temporary hardness of water can be removed by (A) Addition of alum (a coagulant) (B) Boiling (C) Filtration (through gravity sand filter) (D) Addition of lime

Last Answer : (B) Boiling

In water treatment plant, zeolite process is used to remove the __________ of water. (A) Acidity (B) Alkalinity (C) Hardness (D) Iron & zinc

Description : In water treatment plant, zeolite process is used to remove the __________ of water. (A) Acidity (B) Alkalinity (C) Hardness (D) Iron & zinc

Last Answer : (C) Hardness

Zeolite used in water softening process (cation exchange) is regenerated by washing with (A) Brine (B) Chloramines (C) Sodium bisulphite (D) Liquid chlorines

Description : Zeolite used in water softening process (cation exchange) is regenerated by washing with (A) Brine (B) Chloramines (C) Sodium bisulphite (D) Liquid chlorines

Last Answer : (A) Brine

Phenolic water generated in coke ovens & by-product plant attached to an integrated steel plant containing phenol in concentration of less than 100 mg/litre can be removed by (A) Chlorination (B) Treating in biological oxygen pond (C) Chemical coagulation (D) None of these

Description : Phenolic water generated in coke ovens & by-product plant attached to an integrated steel plant containing phenol in concentration of less than 100 mg/litre can be removed by (A) Chlorination (B) Treating in biological oxygen pond (C) Chemical coagulation (D) None of these

Last Answer : (B) Treating in biological oxygen pond

The temporary hardness of water can be removed by (A) Boiling (B) Adding lime (C) Adding alum (D) Filtration

Description : The temporary hardness of water can be removed by (A) Boiling (B) Adding lime (C) Adding alum (D) Filtration

Last Answer : (A) Boiling

Oilish impurities present the effluent discharged from the electroplating industry is normally not removed by (A) Chemical coagulation (B) Floatation & skimming (C) Centrifugation (D) Ultra filtration

Description : Oilish impurities present the effluent discharged from the electroplating industry is normally not removed by (A) Chemical coagulation (B) Floatation & skimming (C) Centrifugation (D) Ultra filtration

Last Answer : (A) Chemical coagulation

The best process of disinfection of public water supply, is by (A) Boiling (B) Chlorination (C) Adding lime (D) Adding ozone

Description : The best process of disinfection of public water supply, is by  (A) Boiling  (B) Chlorination  (C) Adding lime  (D) Adding ozone 

Last Answer : (B) Chlorination 

The technique for purification of proteins that can be made specific for a given protein is (A) Gel filtration chromotography (B) Ion exchange chromatography (C) Electrophoresis (D) Affinity chromatography

Description : The technique for purification of proteins that can be made specific for a given protein is (A) Gel filtration chromotography (B) Ion exchange chromatography (C) Electrophoresis (D) Affinity chromatography

Last Answer : Answer : D

During treatment of water, sedimentation is done (A) Before filtration (B) After filtration (C) Simultaneously with filtration (D) Along with chlorination

Description : During treatment of water, sedimentation is done  (A) Before filtration  (B) After filtration  (C) Simultaneously with filtration  (D) Along with chlorination 

Last Answer : (A) Before filtration 

If Organic sources of carcinogenic compounds in water persist even after chlorination, then what is the correct sequence among treatment processes listed below if all these are considered compulsory ? 1. Coagulation 2. Sedimentation 3. Filtration in general 4. Activated carbon bed filtration 5. Flocculation 6. Chlorination a) 4-5-3-2-6 and 1 b) 1-2-3-4-5 and 6 c) 4- 2- 3- 1- 5 and 6 d) 1-5-2-3-4 and 6

Description : If Organic sources of carcinogenic compounds in water persist even after chlorination, then what is the correct sequence among treatment processes listed below if all these are considered compulsory ? 1. Coagulation 2. Sedimentation 3. Filtration in ... c) 4- 2- 3- 1- 5 and 6 d) 1-5-2-3-4 and 6

Last Answer : d) 1-5-2-3-4 and 6

Soluble silica present in boiler feed water can be removed by (A) Coagulation (B) Filtration (C) Anion exchanger (D) Preheating it

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Which is the most practical and economical method for removal of suspended solid matter from polluted water? (A) Sedimentation (B) Skimming off (C) Chlorination (D) Biological oxidation

Description : Which is the most practical and economical method for removal of suspended solid matter from polluted water? (A) Sedimentation (B) Skimming off (C) Chlorination (D) Biological oxidation

Last Answer : (A) Sedimentation

Use of hydrated lime in water treatment (A) Before filtration, reduces the bacterial load on filters (B) After filtration, combats the corrosiveness of water due to the presence of O2 & CO2 (C) Is to adjust the pH value (D) All (A), (B) and (C)

Description : Use of hydrated lime in water treatment (A) Before filtration, reduces the bacterial load on filters (B) After filtration, combats the corrosiveness of water due to the presence of O2 & CO2 (C) Is to adjust the pH value (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)

De-chlorination is followed by (A) Post-chlorination (B) Pre-chlorination (C) Double-chlorination (D) Super-chlorination

Description : De-chlorination is followed by (A) Post-chlorination (B) Pre-chlorination (C) Double-chlorination (D) Super-chlorination

Last Answer : (D) Super-chlorination

Pick out the true statement pertaining to water treatment. (A) Slow sand filters can remove colour completely (B) Activated carbon can be used for taste & odour control without subsequent filtration (C) Application of activated carbon reduces the temporary hardness of water (D) Normally, the turbidity is removed by adding a coagulant prior to sedimentation

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Last Answer : (D) Normally, the turbidity is removed by adding a coagulant prior to sedimentation

Dissolved carbon dioxide, can be removed from the supply main by (A) Sedimentation (B) Aeration (C) Chlorination (D) Coagulation

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Last Answer : (B) Aeration

Zeolite removes both temporary as well as permanent hardness of water by precipitating calcium and magnesium present in water as insoluble zeolites. Used zeolite is regenerated by flushing with the solution of (A) Calcium sulphate (B) Sodium chloride(C) Sodium sulphate(D) Magnesium chloride

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Last Answer : (B) Sodium chloride

Lime and soda ash are added to water to remove (A) Bicarbonates & sulphates of calcium and magnesium (B) Undesirable taste and odour (C) Bacteria (D) Its corrosiveness

Description : Lime and soda ash are added to water to remove (A) Bicarbonates & sulphates of calcium and magnesium (B) Undesirable taste and odour (C) Bacteria (D) Its corrosiveness

Last Answer : (A) Bicarbonates & sulphates of calcium and magnesium

Permanent hardness of water cannot be removed by (a) Boiling (b) Adding caustic soda (c) Distillation (d) Adding soda

Description : Permanent hardness of water cannot be removed by (a) Boiling (b) Adding caustic soda (c) Distillation (d) Adding soda

Last Answer : Ans:(a)

Brackish water which contains mostly dissolved salt, can be purified by the __________ process. (A) Reverse osmosis (B) Sand filter(C) Lime soda(D) Permutit

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Last Answer : (A) Reverse osmosis

Widely used method for the conditioning of boiler feed water is the (A) Cold lime process (B) Coagulation (C) Hot-lime soda process (D) Sequestration

Description : Widely used method for the conditioning of boiler feed water is the (A) Cold lime process (B) Coagulation (C) Hot-lime soda process (D) Sequestration

Last Answer : (C) Hot-lime soda process

Which of the following is resistant to the action of both heat & chemicals? (A) Borosilicate glass (B) Silica glass (C) Soda lime glass (D) None of these

Description : Which of the following is resistant to the action of both heat & chemicals? (A) Borosilicate glass (B) Silica glass (C) Soda lime glass (D) None of these

Last Answer : (A) Borosilicate glass

Which of the following processes does not produce Cl2 as a co-product during the manufacture of caustic soda? (A) Diaphragm electrolytic cell process (B) Mercury electrolytic cell process (C) Lime-soda process (D) None of these

Description : Which of the following processes does not produce Cl2 as a co-product during the manufacture of caustic soda? (A) Diaphragm electrolytic cell process (B) Mercury electrolytic cell process (C) Lime-soda process (D) None of these

Last Answer : (C) Lime-soda process

Solvay process is used for the manufacture of (A) Caustic soda (B) Soda ash (C) Caustic potash D) Soda lime

Description : Solvay process is used for the manufacture of (A) Caustic soda (B) Soda ash (C) Caustic potash (D) Soda lime

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Which of the following if present in iron ore, enhances its value? (A) Alumina (B) Alkali oxide (C) Lime & Magnesia (D) None of these

Description : Which of the following if present in iron ore, enhances its value? (A) Alumina (B) Alkali oxide (C) Lime & Magnesia (D) None of these

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Description : Pick out the false statement pertaining to water treatment. (A) Aeration of water is effective in CO2 removal (B) The zeolite water softening process reduces the hardness of water by not more than 50% (C ... carbonate do not cause hardness in water (D) Water with pH value less than 7, is acidic

Last Answer : (B) The zeolite water softening process reduces the hardness of water by not more than 50%

The main pollutant in waste water discharged from a petroleum refinery is oil (both in free and emulsified form). Free oil is removed by (A) Biological oxygen pond (B) Aerated lagoons (C) Trickling filters (D) Gravity separator having oil skimming devices

Description : The main pollutant in waste water discharged from a petroleum refinery is oil (both in free and emulsified form). Free oil is removed by (A) Biological oxygen pond (B) Aerated lagoons (C) Trickling filters (D) Gravity separator having oil skimming devices

Last Answer : (D) Gravity separator having oil skimming devices

Mixing vessel used for the chlorination of methane to produce methyl chloride is made of (A) Copper (B) Cast iron (C) Aluminium (D) High carbon steel

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Last Answer : (B) Cast iron

High magnesia lime is added to hot sugar cane juice (during the manufacture of sugar) to (A) Flocculate the impurities(B) Facilitate fast filtration(C) Both (A) and (B)(D) Neither (A) nor (B)

Description : High magnesia lime is added to hot sugar cane juice (during the manufacture of sugar) to (A) Flocculate the impurities (B) Facilitate fast filtration (C) Both (A) and (B) (D) Neither (A) nor (B)

Last Answer : (C) Both (A) and (B)

Which of the following oxides is not present in hematite iron ore? (A) Titanium oxide (B) Calcium oxide (C) Cobalt oxide (D) Manganese oxide

Description : Which of the following oxides is not present in hematite iron ore? (A) Titanium oxide (B) Calcium oxide (C) Cobalt oxide (D) Manganese oxide

Last Answer : (C) Cobalt oxide

Sulphide ion reacts with `[Fe(CN)_(5)NO]` to form a purple coloured compound (X). In this reaction oxidation state of iron .

Description : Sulphide ion reacts with `[Fe(CN)_(5)NO]` to form a purple coloured compound (X). In this reaction oxidation state of iron .

Last Answer : Sulphide ion reacts with `[Fe(CN)_(5)NO]` to form a purple coloured compound (X). In this reaction ... . changes from +2 to +4 D. does not change.

What are the methods of treatment & disposal of radioactive wastes? (A) Evaporation & chemical precipitation (B) Biological methods & adsorption in ion exchange materials (C) Fixing into a solid mass with cement and sinking deep in the sea (D) All (A), (B) & (C)

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Last Answer : (D) All (A), (B) & (C)

Assertion :- In `NH_(4)NO_(3)`, the oxidation number of the two N-atoms is not equal. Reason :- One N atom is present in the ammonium ion while the ot

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Presence of dissolved impurities of __________ is responsible for the red brownish color of water. (A) Carbonates (B) Bi-carbonates (C) Iron & manganese (D) Arsenic

Description : Presence of dissolved impurities of __________ is responsible for the red brownish color of water. (A) Carbonates (B) Bi-carbonates (C) Iron & manganese (D) Arsenic

Last Answer : (C) Iron & manganese

__________ plant emits large amount of SO2 as an air pollutant. (A) Nitric acid (B) Sulphuric acid (C) Chlor alkali (D) Iron & steel

Description : __________ plant emits large amount of SO2 as an air pollutant. (A) Nitric acid (B) Sulphuric acid (C) Chlor alkali (D) Iron & steel

Last Answer : (B) Sulphuric acid

Ion exchange process is similar to (A) Absorption (B) Adsorption (C) Extraction (D) Leaching

Description : Ion exchange process is similar to (A) Absorption (B) Adsorption (C) Extraction (D) Leaching

Last Answer : (B) Adsorption

Pick out the wrong statement (A) Low ozone layer thickness in polar regions is due to cold climatic conditions (B) Amount of unburnt hydrocarbons emitted by two stroke petrol engine is more as compared to that emitted by a four stroke engine (C) Carbon monoxide present in the two stroke petrol engine exhaust is much less as compared to that emitted from a four stroke engine (D) Mercury as a pollutant can enter the blood stream & the digestive system/ lungs and is responsible for causing Minamata disease

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The two sub-units of ribosome remain united at a critical ion level of (a) magnesium (b) calcium (c) copper (d) manganese.

Description : The two sub-units of ribosome remain united at a critical ion level of (a) magnesium (b) calcium (c) copper (d) manganese.

Last Answer : (b) calcium

The two sub-units of ribosome remain united at a critical ion level of (a) magnesium (b) calcium (c) copper (d) manganese.

Description : The two sub-units of ribosome remain united at a critical ion level of (a) magnesium (b) calcium (c) copper (d) manganese.

Last Answer : b) calcium