Polyphosphates are used as water softening agents because they

Polyphosphates are used as water softening agents because they
by

1 Answer

Answer :

Polyphosphates are used as water softening agents because they A. form soluble complexes ... with cationic species D. precipitate cationic species
by

Related questions

Polyphosphates are used as water softening agents because they

Description : Polyphosphates are used as water softening agents because they

Last Answer : Polyphosphates are used as water softening agents because they A. form soluble complexes ... with cationic species D. precipitate cationic species

A material is capable of resisting softening at high temperature, because of its property termed as (A) Hot temper (B) Hot hardness (C) Fatigue (D) Creep

Description : A material is capable of resisting softening at high temperature, because of its property termed as (A) Hot temper (B) Hot hardness (C) Fatigue (D) Creep

Last Answer : (B) Hot hardness

Softening of hard water is done using sodium aluminium silicate (zeolite) . This causes

Description : Softening of hard water is done using sodium aluminium silicate (zeolite) . This causes

Last Answer : Softening of hard water is done using sodium aluminium silicate (zeolite) . This causes A. adsorption of `Ca^(2 ... both (A) and (B) D. none of these

The process of removing calcium and magnesium from hard water is known as – (1) Sedimentation (2) Filtration (3) Flocculation (4) Water softening

Description : The process of removing calcium and magnesium from hard water is known as – (1) Sedimentation (2) Filtration (3) Flocculation (4) Water softening

Last Answer : (4) Water softening Explanation: Water softening is the reduction of the concentration of calcium, magnesium, and certain other metal cations in hard water. Hardness ions dissolved in water can cause a ... use depend on an ion-exchange resin in which hardness ions are exchanged for sodium ions.

Epsom salt is used - (1) as purgative (2) in softening water (3) in paper industry (4) in making tooth paste

Description : Epsom salt is used - (1) as purgative (2) in softening water (3) in paper industry (4) in making tooth paste

Last Answer : (1) as purgative Explanation: Magnesium sulfate is an inorganic salt (chemical compound) containing magnesium, sulfur and oxygen which is commonly called Epsom Salt. Because like other salts, it withdraws water ... toxins from the body; and to draw fluid from the brain in cases of cerebral edema.

The purpose of adding Na2CO3 to water of low alkalinity is to (A) Permit the use of alum as a coagulant (B) Increase the softening capacity of zeolite (C) Facilitate easy regeneration of zeolite (D) All (A), (B) and (C)

Description : The purpose of adding Na2CO3 to water of low alkalinity is to (A) Permit the use of alum as a coagulant (B) Increase the softening capacity of zeolite (C) Facilitate easy regeneration of zeolite (D) All (A), (B) and (C)

Last Answer : (A) Permit the use of alum as a coagulant

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

Drinking (potable) water treatment does not involve(A) Coagulation(B) Sedimentation(C) Softening(D) Disinfection

Description : Drinking (potable) water treatment does not involve (A) Coagulation (B) Sedimentation (C) Softening (D) Disinfection

Last Answer : (C) Softening

Very fine suspended and colloidal impurities are removed from water by a process called (A) Sedimentation (B) Coagulation (C) Disinfection (D) Softening

Description : Very fine suspended and colloidal impurities are removed from water by a process called (A) Sedimentation (B) Coagulation (C) Disinfection (D) Softening

Last Answer : (B) Coagulation

Presence of H2S in raw water (to be chlorinated) results in the (A) Reduced softening capacity of zeolite (B) Increased dosage of chlorine to provide a disinfecting residual in the water (C) Easy removal of its hardness (D) None of these

Description : Presence of H2S in raw water (to be chlorinated) results in the (A) Reduced softening capacity of zeolite (B) Increased dosage of chlorine to provide a disinfecting residual in the water (C) Easy removal of its hardness (D) None of these

Last Answer : (B) Increased dosage of chlorine to provide a disinfecting residual in the water

Pick out the false statement pertaining to water treatment(A) Aeration of water is effective in CO2removal(B) The zeolite water softening process reduces the hardness of water by notmore than 50%(C) Sodium sulphate or sodium carbonate do not cause hardness in water(D) Water with pH value less than 7, is acidic.

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%

Pick up the correct statement from the following: (A) Due to boiling, the bacterias present in water can be destroyed (B) Lime may be used for softening hard water (C) Excess lime when added to water, raises the pH value of water (D) All the above

Description : Pick up the correct statement from the following:  (A) Due to boiling, the bacterias present in water can be destroyed  (B) Lime may be used for softening hard water  (C) Excess lime when added to water, raises the pH value of water  (D) All the above 

Last Answer : (D) All the above 

Epsom salt is used (1) as purgative (2) in softening water (3) in paper industry (4) in making tooth paste

Description : Epsom salt is used (1) as purgative (2) in softening water (3) in paper industry (4) in making tooth paste

Last Answer : as purgative

The process of removing calcium and magnesium from hard water is known as (1) Sedimentation (2) Filtration (3) Flocculation (4) Water softening

Description : The process of removing calcium and magnesium from hard water is known as (1) Sedimentation (2) Filtration (3) Flocculation (4) Water softening

Last Answer :  Water softening

“Rate of softening of water in Ion Exchange method is high,” Give reason.

Description : “Rate of softening of water in Ion Exchange method is high,” Give reason.

Last Answer : Rate of softening of water in ion exchange method is high because, cation exchange beds and anions exchange beds are used this process, which remove all the hardness causing substances. It also removes alkali metals. This process is useful for acidic as well as alkaline water. 

Draw the diagram for zeolite process used for the softening of boiler feed water.

Description : Draw the diagram for zeolite process used for the softening of boiler feed water.

Last Answer : Zeolite process:

What is softening of the brain?

Description : What kind of disease is encephalopathy? Until now, I thought they were just said to have softened the brain, but now an acquaintance of mine has gotten this kind of disease.

Last Answer : Softening of the brain occurs when a certain area of the brain does not receive blood properly, which changes its composition and softens its structure. Unfortunately, softening of the brain is not ... take over the role of already dead tissues from other brain tissues in a healthy area.   

Cervical priming with prostaglandin results in (a) Facilitation of sperm movement through cervical canal (b) Increased cervical tone (c) Softening of cervix (d) Increased cervical secretions

Description : Cervical priming with prostaglandin results in (a) Facilitation of sperm movement through cervical canal (b) Increased cervical tone (c) Softening of cervix (d) Increased cervical secretions

Last Answer : Ans: C

Softening point of high density polythene is about __________ °C. (A) 85 (B) 135 (C) 165 (D) 205

Description : Softening point of high density polythene is about __________ °C. (A) 85 (B) 135 (C) 165 (D) 205

Last Answer : (B) 135

Polyvinyl chloride (PVC) (A) Is produced by Polycondensation reaction (B) Uses either emulsion or suspension polymerisation methods (C) Can be made thermosetting by adding a plasticiser (D) Softening temperature is 200°C

Description : Polyvinyl chloride (PVC) (A) Is produced by Polycondensation reaction (B) Uses either emulsion or suspension polymerisation methods (C) Can be made thermosetting by adding a plasticiser (D) Softening temperature is 200°C

Last Answer : (B) Uses either emulsion or suspension polymerisation methods

Linear polymers are normally (A) Thermosetting (B) Thermoplastic (C) Elastometric (D) Having extremely high softening poin

Description : Linear polymers are normally (A) Thermosetting (B) Thermoplastic (C) Elastometric (D) Having extremely high softening poin

Last Answer : (B) Thermoplastic

Pick out the wrong statement. (A) Linear polymers are formed from bifunctional groups only and are normally thermoplastic (B) Cross-linked branched chain polymers are either elastometric or thermosetting (C) Branching in case of cross-linked polymers caused by small amount of impurities in bifunctional monomer formulation reduces its solubility and increases the softening point (D) Dibasic acids reacts with dihydric alcohols to give polyesters using addition polymerisation reaction

Description : Pick out the wrong statement. (A) Linear polymers are formed from bifunctional groups only and are normally thermoplastic (B) Cross-linked branched chain polymers are either elastometric or ... (D) Dibasic acids reacts with dihydric alcohols to give polyesters using addition polymerisation reaction

Last Answer : D) Dibasic acids reacts with dihydric alcohols to give polyesters using addition polymerisation reaction

Mastication of rubber means (A) Its softening (B) A treatment to retard its deterioration due to oxidation (C) Improving its curing rate (D) Depression of its freezing point

Description : Mastication of rubber means (A) Its softening (B) A treatment to retard its deterioration due to oxidation (C) Improving its curing rate (D) Depression of its freezing point

Last Answer : (A) Its softening

__________ test is done to find out the softening point of bitumen. (A) Impact (B) Ball and ring (C) Flame (D) Viscosity

Description : __________ test is done to find out the softening point of bitumen. (A) Impact (B) Ball and ring (C) Flame (D) Viscosity

Last Answer : (B) Ball and ring

Which of the following heat treatment processes is used for softening the hardened material? (A) Normalising (B) Tempering (C) Annealing (D) None of these

Description : Which of the following heat treatment processes is used for softening the hardened material? (A) Normalising (B) Tempering (C) Annealing (D) None of these

Last Answer : (B) Tempering

Softening of hardened steel is done by its (A) Normalising (B) Tempering (C) Annealing (D) Carburising

Description : Softening of hardened steel is done by its (A) Normalising (B) Tempering (C) Annealing (D) Carburising

Last Answer : (B) Tempering

To improve the machinability of steel by its softening, it is subjected to (A) Cold working (B) Annealing (C) Shot blasting (D) Heating

Description : To improve the machinability of steel by its softening, it is subjected to (A) Cold working (B) Annealing (C) Shot blasting (D) Heating

Last Answer : (B) Annealing

The major metabolic process which takes place in the harvested produce is _______: a. Ripening b. Respiration c. Softening d. Senescence

Description : The major metabolic process which takes place in the harvested produce is _______: a. Ripening b. Respiration c. Softening d. Senescence

Last Answer : Respiration

Softening temperature of coal ash is a measure of the __________ of coal. (A) Caking tendency (B) Coking tendency (C) Clinkering tendency (D) Size stability

Description : Softening temperature of coal ash is a measure of the __________ of coal. (A) Caking tendency (B) Coking tendency (C) Clinkering tendency (D) Size stability

Last Answer : (C) Clinkering tendency

The ability of tool steel to resist softening at high temperatures is termed as __________ hardness. (A) Red (B) Extended (C) Super (D) Extreme

Description : The ability of tool steel to resist softening at high temperatures is termed as __________ hardness. (A) Red (B) Extended (C) Super (D) Extreme

Last Answer : (C) Super

Softening of hardened steel is done by its (A) Normalising (B) Tempering (C) Annealing (D) Carburising

Description : Softening of hardened steel is done by its (A) Normalising (B) Tempering (C) Annealing (D) Carburising

Last Answer : (A) Normalising

Softening point of bitumen to be used for read construction at a place where maximum temperature is 40°C should be (A) Less than 40°C (B) Greater than 40°C (C) Equal to 40°C (D) None of the above

Description : Softening point of bitumen to be used for read construction at a place where maximum temperature is 40°C should be (A) Less than 40°C (B) Greater than 40°C (C) Equal to 40°C (D) None of the above

Last Answer : Answer: Option B

A pug mill is used for (A) Softening brick earth (B) Moulding brick earth (C) Tempering brick earth (D) Providing brick earth

Description : A pug mill is used for (A) Softening brick earth (B) Moulding brick earth (C) Tempering brick earth (D) Providing brick earth

Last Answer : Answer: Option C

A pug mill is used for a) Softening brick earth b) Moulding brick earth c) Tempering brick earth* d) Compacting brick earth

Description : A pug mill is used for a) Softening brick earth b) Moulding brick earth c) Tempering brick earth* d) Compacting brick earth

Last Answer : c) Tempering brick earth*

Cervical priming with prostaglandin results in: A. Facilitation of sperm movement through cervical canal B. Increased cervical tone C. Softening of cervix D. Increased cervical secretions

Description : Cervical priming with prostaglandin results in: A. Facilitation of sperm movement through cervical canal B. Increased cervical tone C. Softening of cervix D. Increased cervical secretions

Last Answer : C. Softening of cervix

Explain the procedure for determining softening point of bitumen.

Description : Explain the procedure for determining softening point of bitumen. 

Last Answer : Procedure for determining softening point of bitumen:- 1) Sample material is heated to a temperature between 750 C to 1000 C above the approximate point until it is completely fluid and is poured in ... glycerin is used in heating medium and the starting temperature is 350 C instead of 50 C.

Explain Softening Point Test on Bitumen with neat sketch.

Description : Explain Softening Point Test on Bitumen with neat sketch.

Last Answer : Softening Point Test: The softening point test is conducted by Ring and Ball method in the laboratory as described below: The test sample of the given bituminous material is put ... values and thus the suitability of the bitumen under test is decided for bituminous pavement construction. 

Differentiate between thermosetting and thermo-softening plastics.

Description : Differentiate between thermosetting and thermo-softening plastics. 

Last Answer : Thermosetting Thermo-softening 1. The plastics who possess three dimensional complicated structure with cross linkages are called as thermo setting plastics 1. The plastics who possess ... , Urea formaldehyde, Silicon plastic 11. Examples- Polythene, Polystyrene, PVC, Teflon 

Amino acids excepting histidine are not good buffering agents in cell because (A) They exist as zwitter ions (B) Their pk and not in the physiological pH of a cell (C) Only Histidine has pk of its R group at 6.0 unlike the others which have at a different pH (D) None of these

Description : Amino acids excepting histidine are not good buffering agents in cell because (A) They exist as zwitter ions (B) Their pk and not in the physiological pH of a cell (C) Only Histidine has pk of its R group at 6.0 unlike the others which have at a different pH (D) None of these

Last Answer : Answer : C

Many food brokers are more accurately described as manufacturers' agents because they A)handle food products from a single manufacturer. B)provide assistance in grading, negotiating, and inspecting foods. C)have specialised knowledge of a particular commodity. D)provide services on a somewhat permanent basis and operate in specific geographic territories. E)charge higher commissions than most other brokers.

Description : Many food brokers are more accurately described as manufacturers' agents because they A)handle food products from a single manufacturer. B)provide assistance in grading, negotiating, and ... and operate in specific geographic territories. E)charge higher commissions than most other brokers.

Last Answer : D)provide services on a somewhat permanent basis and operate in specific geographic territories

Winds are classed as agents of erosion rather than of weathering because: w) they have nothing to do with the weather x) they carry rock particles away y) they work only part of the time z) they build up rather than wear down the rock

Description : Winds are classed as agents of erosion rather than of weathering because: w) they have nothing to do with the weather x) they carry rock particles away y) they work only part of the time z) they build up rather than wear down the rock

Last Answer : ANSWER: X -- THEY CARRY ROCK PARTICLES AWAY

Because of proven beneficial effects on “cardiac remodeling”, these agents are now indicated as first line therapy in CHF patients. Which of the following is representative of this group of drugs? (a) Hydrochlorothiazide (b) Enalapril (c) Furosemide (d) Carvedilol (e) Bumetanide

Description : Because of proven beneficial effects on “cardiac remodeling”, these agents are now indicated as first line therapy in CHF patients. Which of the following is representative of this group of drugs? (a) Hydrochlorothiazide (b) Enalapril (c) Furosemide (d) Carvedilol (e) Bumetanide

Last Answer : Ans: B

(4) sodium chloride contains hygroscopic impurities like magnesium chloride Explanation: Table salt is refined salt, which contains about 97 to 99 percent sodium chloride. It usually contains substances that make it freeflowing (anticaking agents) such as sodium aluminosilicate or magnesium carbonate. Because of Hygroscopic nature of salt it become wet in rainy season as the salt absorbs moisture from environment.

Description : (4) sodium chloride contains hygroscopic impurities like magnesium chloride Explanation: Table salt is refined salt, which contains about 97 to 99 percent sodium chloride. It usually contains substances that ... of salt it become wet in rainy season as the salt absorbs moisture from environment.

Last Answer : Which of the following could be used as fuel in propellant or rockets? (1) Liquid Hydrogen + Liquid Nitrogen (2) Liquid Oxygen + Liquid Argon (3) Liquid Nitrogen + Liquid Oxygen (4) Liquid Hydrogen + Liquid Oxygen

Uncertainty arises in the wumpus world because the agent’s sensors give only ___________ a) Full & Global information b) Partial & Global Information c) Partial & local Information d) Full & local information

Description : Uncertainty arises in the wumpus world because the agent’s sensors give only ___________ a) Full & Global information b) Partial & Global Information c) Partial & local Information d) Full & local information

Last Answer : c) Partial & local Information

if you suspect atrial flutter : Consider digoxin if not already in use because it frequently increases the conduction ratio and decreases the ventricular rate. , Avoid adrenergic and atropinic agents during sedation or anesthesia for cardioversion. Ketamine is relatively contraindicatedthe cause of premature ventricular contraction? decrease O2 supply to the muscle decrease blood supply to the muscle the heart trying to beat fast ______________________________

Description : if you suspect atrial flutter : Consider digoxin if not already in use because it frequently increases the conduction ratio and decreases the ventricular rate. , Avoid adrenergic and ... to the muscle decrease blood supply to the muscle the heart trying to beat fast ______________________________

Last Answer : decrease O2 supply to the muscle

Do travel agents still get as much work as they did 10 years ago?

Description : Do travel agents still get as much work as they did 10 years ago?

Last Answer : On average travel agents do not get paid as much as they used to because of the internet and websites which promote a "do it yourself" kind of adventure. Not only do they not get paid as much as before but the overall demand for the job is decreasing, thus less jobs opportunities are available.

Real estate agents are not always honest and forthcoming when they show you a house.?

Description : Real estate agents are not always honest and forthcoming when they show you a house.?

Last Answer : real estate agents are not always honest and forthcoming when they show you a house.

Which provides agents with information about the world they inhabit? a) Sense b) Perception c) Reading d) Hearing

Description : Which provides agents with information about the world they inhabit? a) Sense b) Perception c) Reading d) Hearing

Last Answer : b) Perception

One difference between manufacturers' agents and selling agents is that A)selling agents have little control over the marketing mix of the manufacturers they represent. B)selling agents represent retailers. C)manufacturers' agents are not able to offer retailers aid in advertising or other promotional material. D)selling agents seldom have the territorial restrictions that manufacturers' agents do. E)selling agents represent wholesalers.

Description : One difference between manufacturers' agents and selling agents is that A)selling agents have little control over the marketing mix of the manufacturers they represent. B)selling agents ... have the territorial restrictions that manufacturers' agents do. E)selling agents represent wholesalers.

Last Answer : E)selling agents represent wholesalers.