167 + Interview Questions in Water in Applied Chemistry Page 2 InterviewSolution

51.	1 degree Clark is equal to ________ ppm.(a) 12.3(b) 13.3(c) 14.3(d) 15.3The question was posed to me by my college director while I was bunking the class.My doubt stems from Problems, Units and Formulae in section Water of Applied Chemistry
Answer» CORRECT answer is (c) 14.3 Explanation: One DEGREE CLARK is EQUAL to the 14.3 ppm. Ppm means parts per million. 1ppm is equal to 1mg/litre.

Discussion

52.	The decomposition of the matter produces into ___________ and in presence of ____________(a) Carbondioxide and oxygen(b) Oxygen and nitrogen(c) Nitrogen and carbondioxide(d) Nitrogen and chlorineThis question was addressed to me in an online interview.Query is from Types of Water Pollutants and Effects in division Water of Applied Chemistry
Answer» CORRECT answer is (a) Carbondioxide and OXYGEN To explain: The DECOMPOSITION of the MATTER produces into carbondioxide and in the presence of oxygen. Oxygen is TAKEN from the water.

Discussion

53.	The disappearance of the plants and animals is due to the _________ in water.(a) Nitrogen depletion(b) Chlorine depletion(c) Oxygen depletion(d) Ozone depletionI got this question in class test.I need to ask this question from Types of Water Pollutants and Effects in portion Water of Applied Chemistry
Answer» Correct answer is (c) Oxygen DEPLETION Explanation: The DISAPPEARANCE of the plants and ANIMALS is due to the depletion of the oxygen in the water. Micro organisms mainly bacteria USES the organic MATTER in water as food.

Discussion

54.	Bacteria and micro organisms present in the water will cause _________ in human and animals.(a) Indigestion(b) Intestinal tract(c) Brain tumour(d) CancerThe question was posed to me in class test.My query is from Types of Water Pollutants and Effects in chapter Water of Applied Chemistry
Answer» Right option is (b) Intestinal TRACT The explanation: Bacteria and micro organisms PRESENT in the WATER will cause intestinal tract. The infected individual has the intestinal discharge CONTAINING the BILLIONS of pathogens.

Discussion

55.	The continuous supply of soft water can be provided by having ____________(a) Storage facilities(b) Required amount of ppm(c) High pressure boilers(d) 1ppmThis question was addressed to me in an interview for job.This key question is from Ion Exchange Process topic in portion Water of Applied Chemistry
Answer» RIGHT ANSWER is (a) Storage facilities To explain: The CONTINUOUS SUPPLY of soft water can be PROVIDED by having storage facilities and also two columns of each resin.

Discussion

56.	Zeolite process is also called as __________(a) Permutit’s process(b) Demineralization(c) Batch’s process(d) Lime soda processThis question was addressed to me by my college director while I was bunking the class.My question is from Permutit’s Process topic in division Water of Applied Chemistry
Answer» The correct OPTION is (a) Permutit’s PROCESS The explanation is: The ZEOLITE process is also CALLED as the permutit’s process. The zeolite process is very useful to remove the hardness of WATER.

Discussion

57.	In the case of the zeolites, ion exchange process do not function properly because of the __________(a) Turbidity(b) Suspended matter(c) Turbidity and suspended matter(d) Neither turbidity nor suspended matterThis question was addressed to me during a job interview.My question comes from Ion Exchange Process in section Water of Applied Chemistry
Answer» Correct option is (c) Turbidity and suspended matter Best EXPLANATION: In case of ZEOLITES, ION exchange process do not function PROPERLY because of the turbidity and suspended matter as they send to cover the SURFACE of the resin.

Discussion

58.	Lime soda process does not involve steps.(a) True(b) FalseI got this question during an interview for a job.I'm obligated to ask this question of Lime Washing Soda Method in portion Water of Applied Chemistry
Answer» The correct ANSWER is (B) False Explanation: Lime soda process involves steps like filtration, settling of PRECIPITATES, coagulation and REMOVAL of sludge.

Discussion

59.	Batch process is only used for removing the hardness of the water on _________(a) Small scale(b) Large scale(c) Industrial purposes(d) Irrigation purposesI got this question during an interview for a job.The above asked question is from Lime Washing Soda Method in section Water of Applied Chemistry
Answer» Correct option is (a) Small scale The explanation is: Batch PROCESS is only used for removing the hardness of the small scale. The Continuous SODA LIME process is used for the industrial PURPOSES.

Discussion

60.	Surface water appears turbid due to the presence of the __________ which remains suspended in the water.(a) Impurities(b) Oxygen(c) Nitrogen(d) Water plantsI have been asked this question in examination.My enquiry is from Sources, Impurities and Hardness of Water in division Water of Applied Chemistry
Answer» Right ANSWER is (a) Impurities Explanation: SURFACE WATER appears turbid due to the presence of the impurities which remains suspended in the water. The dissolved gases make the water into BAD odour.

Discussion

61.	One French unit is equal to _________ mg/litre.(a) 5(b) 10(c) 15(d) 20The question was posed to me in my homework.The origin of the question is Problems, Units and Formulae in portion Water of Applied Chemistry
Answer» The correct OPTION is (B) 10 The explanation is: ONE French unit is equal to 10mg/litre. One French unit is equal to 10ppm and 0.7 DEGREE Clark.

Discussion

62.	Determination of flow increase is used for the monitoring of ___________(a) sea pollution(b) River pollution(c) Lake pollution(d) Tank pollutionThis question was addressed to me in final exam.The doubt is from Monitoring and Control of Water Pollution in portion Water of Applied Chemistry
Answer» Right option is (b) RIVER pollution Easy EXPLANATION: Determination of the flow INCREASE or stream treatment timing are USED to monitor the river WATER pollution.

Discussion

63.	Coastal water shows major differences in ___________(a) Pollution(b) Sewage(c) Salinity(d) ConductivityThis question was posed to me in quiz.The query is from Monitoring and Control of Water Pollution topic in section Water of Applied Chemistry
Answer» RIGHT answer is (C) Salinity Best EXPLANATION: Coastal water shows MAJOR differences in salinity. The salinity of the sea water is higher than that of the rivers and lakes.

Discussion

64.	COD can be determined in ___________(a) 1 Hour(b) 2 Hours(c) 3 Hours(d) 4 HoursThe question was asked in a job interview.This intriguing question comes from Reverse Osmosis, Ultrafilteration, COD and BOD in chapter Water of Applied Chemistry
Answer» Correct choice is (C) 3 Hours The explanation is: COD can be determined in 3 hours. The organic MATTER of SAMPLE is oxidised to the carbondioxide, AMMONIA and water.

Discussion

65.	The residual hardness after the treatment of water is about __________(a) 1 ppm(b) Less than 1ppm(c) 2 ppm(d) Less than 2pmmThis question was addressed to me during a job interview.I'd like to ask this question from Ion Exchange Process in division Water of Applied Chemistry
Answer» The correct OPTION is (d) Less than 2pmm For explanation: The RESIDUAL hardness after the treatment of the water is about less than 2ppm. So, they are suitable for the high pressure BOILERS.

Discussion

66.	Reagent used in the lime soda process is _______(a) Regenerated(b) Not regenerated(c) Regenerated depending on the hardness(d) Regenerated some timesI have been asked this question in a job interview.Query is from Lime Washing Soda Method in section Water of Applied Chemistry
Answer» Correct choice is (b) Not regenerated To EXPLAIN: Reagent USED in the LIME SODA process is can not be regenerated. The high temperatures are APPLIED in this process.

Discussion

67.	In batch process, when the tank gets filled then it indicates that ____________(a) To stir more(b) Softening is completed(c) To add the catalyst(d) To add the limeThis question was addressed to me in an international level competition.This is a very interesting question from Lime Washing Soda Method topic in division Water of Applied Chemistry
Answer» Correct option is (b) Softening is COMPLETED Explanation: In BATCH PROCESS, when the tank gets filled then it indicates that the softening of the water is completed. TWO tanks are used for construction in the batch process.

Discussion

68.	Total dissolved solids in the lime soda process is _________(a) Reduced(b) Not reduced(c) Remains same(d) Slightly reducedThe question was posed to me in an international level competition.My question is from Lime Washing Soda Method topic in portion Water of Applied Chemistry
Answer» The correct option is (a) Reduced For EXPLANATION: Total dissolved SOLIDS in the lime soda process is reduced. It REALLY works well for eliminating EVERY complex element that cause the HARDNESS of the water.

Discussion

69.	Hardness of the water in the lime soda process is reduced to __________(a) 10-15ppm(b) 15-30ppm(c) 30-35ppm(d) 35-40ppmI had been asked this question in an interview for job.This intriguing question comes from Lime Washing Soda Method in portion Water of Applied Chemistry
Answer» RIGHT choice is (b) 15-30ppm Explanation: HARDNESS of the water in the lime soda process is reduced to 15-30ppm. The lime soda process INVOLVES the conversion of the soluble complexes into the insoluble PRECIPITATES.

Discussion

70.	The sodium soap will precipitate all the hardness causing ions into their respective __________(a) Carbonates(b) Bicarbonates(c) Stereates(d) ChloridesThis question was addressed to me in class test.My query is from Estimation of Hardness in division Water of Applied Chemistry
Answer» Right answer is (c) Stereates The BEST explanation: The sodium soap will PRECIPITATE all the HARDNESS causing ions into their respective stereates in the beginning of the soap TITRATION method.

Discussion

71.	Chemical composition of the lake water is _________(a) Constant(b) Not constant(c) Some times constant(d) Cannot be determinedI had been asked this question in homework.This key question is from Sources, Impurities and Hardness of Water in section Water of Applied Chemistry
Answer» Right choice is (a) CONSTANT Easy explanation: CHEMICAL composition of LAKES is constant. It has a high QUANTITY of organic matter and lesser quantity dissolved minerals.

Discussion

72.	Amino acids comes under _________ impurity.(a) Dissolved impurity(b) Colloidal impurity(c) Dissolved gases(d) Bacterial impuritiesI got this question by my school teacher while I was bunking the class.My doubt is from Sources, Impurities and Hardness of Water in chapter Water of Applied Chemistry
Answer» CORRECT OPTION is (b) Colloidal impurity Easiest explanation: Amino ACIDS comes under the colloidal impurities. All the gases like nitrogen, OXYGEN and carbondioxide comes under the dissolved gases.

Discussion

73.	___________ is the purest form of the water obtained by natural distillation.(a) Under ground water(b) Sea water(c) River water(d) Rain waterThe question was posed to me in an interview.My question is based upon Sources, Impurities and Hardness of Water in portion Water of Applied Chemistry
Answer» CORRECT CHOICE is (d) Rain water Easy EXPLANATION: Rain water is the purest form of the water obtained by natural distillation. Some PART of the rain water penetrates into the ground and there it will be stored.

Discussion

74.	In reverse osmosis, the membrane pores are smaller in size about ___________(a) 0.04 to 600nm(b) 0.08 to 500nm(c) 0.1 to 600nm(d) 0.2 to 500nmThis question was posed to me in an interview for job.I'm obligated to ask this question of Reverse Osmosis, Ultrafilteration, COD and BOD in division Water of Applied Chemistry
Answer» Right option is (a) 0.04 to 600NM For explanation: In REVERSE osmosis, the SIZE of the membrane USED is very smaller. It is about 0.04 to 600nm.

Discussion

75.	In reverse osmosis, the water flows from __________ concentration to ___________ concentration.(a) Low, high(b) High, low(c) High, moderate(d) Moderate, lowThe question was asked by my school principal while I was bunking the class.The origin of the question is Reverse Osmosis, Ultrafilteration, COD and BOD topic in portion Water of Applied Chemistry
Answer» Right choice is (a) Low, high To explain: In REVERSE OSMOSIS, the WATER flows from the lower to higher CONCENTRATION. In osmosis the water flows from the higher to lower concentration.

Discussion

76.	The ____________ is an important requirement of the aquatic life.(a) Dissolved nitrogen(b) Dissolved chlorine(c) Dissolved oxygen(d) Dissolved methaneThis question was posed to me in an international level competition.This key question is from Types of Water Pollutants and Effects topic in chapter Water of Applied Chemistry
Answer» CORRECT CHOICE is (c) DISSOLVED oxygen To EXPLAIN I would say: The dissolved oxygen is an important REQUIREMENT of the aquatic life. They take oxygen from the water to survive.

Discussion

77.	Amoebic dysentery is caused by ___________(a) Viruses(b) Bacteria(c) Helminth(d) ProtozoaThe question was asked during an online exam.My query is from Types of Water Pollutants and Effects in chapter Water of Applied Chemistry
Answer» Correct ANSWER is (d) Protozoa The explanation: Amoebic dysentery is caused by the protozoa present in the DRINKING water. In this disease, the water content from the body is lost and the person will become WEAK.

Discussion

78.	Infectious hepatitis is caused by ___________(a) Bacteria(b) Viruses(c) Protozoa(d) HelminthI have been asked this question in quiz.My doubt stems from Types of Water Pollutants and Effects topic in section Water of Applied Chemistry
Answer» Correct option is (B) VIRUSES The explanation: The infectious hepatitis is CAUSED by viruses. The viruses in water also cause the poliomyelitis disease.

Discussion

79.	Ion exchange process is also called as ___________(a) Permutit’s process(b) Demineralization(c) Zeolite process(d) Lime soda processI got this question in an internship interview.The question is from Ion Exchange Process in division Water of Applied Chemistry
Answer» The correct CHOICE is (b) Demineralization Best explanation: ION EXCHANGE process is also called as the demineralization. The ZEOLITE process is otherwise called as the ion exchange process.

Discussion

80.	How many steps are involved in the zeolite process?(a) 4(b) 3(c) 2(d) 1This question was addressed to me in an online quiz.My question comes from Permutit’s Process topic in division Water of Applied Chemistry
Answer» CORRECT choice is (d) 1 The best I can EXPLAIN: There are no steps involved in the zeolite process. The WATER hardness will be REMOVED in ONE operation in zeolite process.

Discussion

81.	The capital cost of the zeolite process is ___________(a) Less(b) High(c) Very high(d) Very lowI got this question in a job interview.My question comes from Permutit’s Process in division Water of Applied Chemistry
Answer» The correct ANSWER is (c) Very high The explanation is: The capital COST of the ZEOLITE process is very high. The operational cost of the zeolite process is LOW.

Discussion

82.	In dissolved mineral salts ___________ gets converted into the bicarbonates by the action of carbondioxide by water.(a) Carbonate of calcium(b) Carbonates of magnesium(c) Carbonates of calcium and magnesium(d) Neither carbonates of calcium nor magnesiumThis question was posed to me during an online exam.The origin of the question is Sources, Impurities and Hardness of Water in chapter Water of Applied Chemistry
Answer» Right option is (C) Carbonates of calcium and magnesium Best explanation: In dissolved mineral SALTS, the carbonates of calcium and magnesium GET CONVERTED into the BICARBONATES by the action of the carbondioxide by water.

Discussion

83.	The BOD value of the food industry is about ___________(a) 742(b) 743(c) 744(d) 745I got this question in a national level competition.My question is taken from Methods of Reducing Water Pollution in chapter Water of Applied Chemistry
Answer» Correct choice is (d) 745 For EXPLANATION: The BOD value of the FOOD industry is about 745. This value is higher than that of the normal limits.

Discussion

84.	In sewage the waste is about ___________(a) 0.01(b) 0.02(c) 0.03(d) 0.05I got this question in class test.I'd like to ask this question from Reverse Osmosis, Ultrafilteration, COD and BOD topic in portion Water of Applied Chemistry
Answer» Correct CHOICE is (d) 0.05 To explain: Sewage CONTAINS 99.95% of water and 0.05% of the organic and municipal WASTES. Strength of sewage is expressed in TERMS of BOD.

Discussion

85.	The optimum value in natural water is ________(a) 2-4ppm(b) 4-7ppm(c) 4-6ppm(d) 2-7ppmThis question was posed to me by my college director while I was bunking the class.Enquiry is from Types of Water Pollutants and Effects in section Water of Applied Chemistry
Answer» RIGHT choice is (c) 4-6ppm The explanation: The OPTIMUM value in NATURAL water is about 4-6ppm. Decrease in the quantity of the dissolved water INDICATES the pollution of water.

Discussion

86.	Very low hardness of __________ can be achieved in the zeolite process.(a) 3ppm(b) 4ppm(c) 5ppm(d) Less than 5ppmThe question was posed to me during an internship interview.I would like to ask this question from Permutit’s Process in portion Water of Applied Chemistry
Answer» Correct choice is (d) LESS than 5ppm The best explanation: By careful monitoring it will be POSSIBLE to achieve the very low hardness of the less than that of 5ppm can be ACHIEVED in the zeolite process.

Discussion

87.	The hardness in the ion exchange process is reduced to ___________(a) 0-1ppm(b) 0-2ppm(c) 0-3ppm(d) 0-4ppmThe question was asked in a job interview.I would like to ask this question from Ion Exchange Process in chapter Water of Applied Chemistry
Answer» Correct ANSWER is (b) 0-2PPM Easy explanation: The hardness of the ion exchange PROCESS is reduced to 0 to 2ppm. It is a very effective method to REDUCE the hardness of the water.

Discussion

88.	The zeolite process is used for turbid process.(a) True(b) FalseThe question was asked during a job interview.This interesting question is from Permutit’s Process in section Water of Applied Chemistry
Answer» The CORRECT choice is (b) False To elaborate: The ZEOLITE process cannot be used for the turbid process. The zeolites are NATURALLY occurring sodium aluminium silicates.

Discussion

89.	The standard hard water is prepared such that each ml must contain ________ mg of CaCO3.(a) 1(b) 2(c) 3(d) 4The question was posed to me in unit test.My doubt stems from Estimation of Hardness topic in chapter Water of Applied Chemistry
Answer» Correct option is (a) 1 To elaborate: The 1G of pure CaCO3 is DISSOLVED in the minimum AMOUNT of concentrated HCL diluted to 1ltr of distilled water such that it CONTAINS 1MG of CaCO3.

Discussion

90.	Estimation of hardness can be determined by ________ types.(a) 2(b) 3(c) 4(d) 5This question was posed to me during an interview.Origin of the question is Estimation of Hardness topic in portion Water of Applied Chemistry
Answer» Correct choice is (a) 2 The explanation: ESTIMATION of hardness can be determined by TWO types. They are Soap titration method and EDTA method.

Discussion

91.	Which of the following process does not remove the permanent hardness of water?(a) Lime-soda(b) Ion exchange process(c) Zeolite process(d) HeatingThe question was posed to me during a job interview.The origin of the question is Estimation of Hardness in section Water of Applied Chemistry
Answer» The correct choice is (c) Zeolite PROCESS Best explanation: Heating of the water REMOVES the temporary hardness and the permanent hardness is REMOVED by the zeolite process, lime soda process and the ion exchange method.

Discussion

92.	Which of the following does not cause the permanent hardness in water?(a) Nitrates(b) Sulphates(c) Chlorides(d) BicarbonatesI have been asked this question in final exam.My doubt is from Estimation of Hardness in section Water of Applied Chemistry
Answer» Correct option is (d) Bicarbonates Easiest EXPLANATION: The bicarbonates of the CALCIUM and magnesium CAUSE the temporary hardness and the SULPHIDES, nitrates and the chlorides cause permanent hardness.

Discussion

93.	The organic matter in drinking water must be about _________(a) 0.2-1.0ppm(b) 1.0-2.0ppm(c) 2.0-3.0ppm(d) 3.0-4.0ppmThe question was posed to me by my school principal while I was bunking the class.I want to ask this question from Estimation of Hardness in division Water of Applied Chemistry
Answer» Right answer is (a) 0.2-1.0ppm The EXPLANATION: The ORGANIC matter in DRINKING water MUST be about 0.2-1.0ppm. The phosphate is also LOW that is about 10-15ppm.

Discussion

94.	The PH value of the drinking water is about _________(a) 6.5-8.5(b) 5.5-6.5(c) 4.5-5.5(d) 3.5-4.5I had been asked this question in quiz.This key question is from Estimation of Hardness topic in section Water of Applied Chemistry
Answer» Right ANSWER is (a) 6.5-8.5 For explanation: The PH value of the drinking WATER is about 6.5 to 8.5. The ODOUR of the drinking water is UNOBJECTIONABLE but the drinking water is generally having no odour.

Discussion

95.	Soaps can be defined as the soap consuming capacity of the water sample.(a) True(b) FalseI have been asked this question by my school teacher while I was bunking the class.I'm obligated to ask this question of Estimation of Hardness topic in section Water of Applied Chemistry
Answer» Correct choice is (a) True The explanation is: Soaps are defined as the SOAP consuming capacity of the water. Soaps are SODIUM salts of fatty acids like OLEIC ACID and STEARIC acid.

Discussion

96.	The chemical oxygen demand can be given as __________(a) {[(V1-V2)N8]}/x(b) {[(V1+V2)N8]}/x(c) {[(V2-V1)N8]}/x(d) {[(V1/V2)N8]}/xI had been asked this question during an online interview.My query is from Problems, Units and Formulae topic in portion Water of Applied Chemistry
Answer» Right CHOICE is (a) {[(V1-V2)N8]}/x The explanation: The chemical oxygen demand can be given by {[(V1-V2)N8]}/x where V1=volume of ferrous ammonium sulphate required for blank, V2=volume of ferrous ammonium sulphate required for TEST, N=normality of ferrous ammonium sulphate, x=volume of SEWAGE sample TAKEN.

Discussion

97.	__________ co polymer can remove the chlorinated pesticides.(a) Styrene di vinyl benzene(b) Styrene(c) Benzoyl peroxide(d) PhenolI got this question in a national level competition.Question is taken from Reverse Osmosis, Ultrafilteration, COD and BOD topic in portion Water of Applied Chemistry
Answer» Right ANSWER is (a) STYRENE di vinyl benzene Best EXPLANATION: The styrene di vinyl benzene can remove the chlorinated PESTICIDES by absorption at the surface.

Discussion

98.	The organic matter present in the water is of __________ types.(a) Two(b) Three(c) Four(d) FiveThis question was posed to me in exam.I need to ask this question from Types of Water Pollutants and Effects in portion Water of Applied Chemistry
Answer» The correct answer is (a) TWO Explanation: The organic matter present in the WATER is of two TYPES. They are biologically oxidisable and biologically INERT.

Discussion

99.	For avoiding the reduction of the residual hardness, incomplete precipitation and slow reaction, The reaction is carried out at __________ temperature.(a) 30-40^oC(b) 40-50^oC(c) 50-60^oC(d) 60-70^oCI got this question during an interview.My question is taken from Lime Washing Soda Method topic in division Water of Applied Chemistry
Answer» Right option is (C) 50-60^oC Explanation: For AVOIDING the REDUCTION of the residual HARDNESS, INCOMPLETE precipitation and slow reaction, The reaction is carried out at 50-60^oC temperature.

Discussion

100.	In hot lime soda process, the bacteria in water is reduced to the minimum due to the _________(a) High temperature(b) Faster reactions(c) Slow reactions(d) Low temperatureThis question was addressed to me by my school teacher while I was bunking the class.I'm obligated to ask this question of Lime Washing Soda Method in portion Water of Applied Chemistry
Answer» Correct answer is (a) High temperature The BEST explanation: In hot LIME SODA process the bacteria count in water is reduced to the minimum due to the high temperatures that are APPLIED to the water during the process.

Discussion

Explore topic-wise InterviewSolutions in .

1 degree Clark is equal to ________ ppm.(a) 12.3(b) 13.3(c) 14.3(d) 15.3The question was posed to me by my college director while I was bunking the class.My doubt stems from Problems, Units and Formulae in section Water of Applied Chemistry

Bacteria and micro organisms present in the water will cause _________ in human and animals.(a) Indigestion(b) Intestinal tract(c) Brain tumour(d) CancerThe question was posed to me in class test.My query is from Types of Water Pollutants and Effects in chapter Water of Applied Chemistry

Lime soda process does not involve steps.(a) True(b) FalseI got this question during an interview for a job.I'm obligated to ask this question of Lime Washing Soda Method in portion Water of Applied Chemistry

Batch process is only used for removing the hardness of the water on _________(a) Small scale(b) Large scale(c) Industrial purposes(d) Irrigation purposesI got this question during an interview for a job.The above asked question is from Lime Washing Soda Method in section Water of Applied Chemistry

One French unit is equal to _________ mg/litre.(a) 5(b) 10(c) 15(d) 20The question was posed to me in my homework.The origin of the question is Problems, Units and Formulae in portion Water of Applied Chemistry

Determination of flow increase is used for the monitoring of ___________(a) sea pollution(b) River pollution(c) Lake pollution(d) Tank pollutionThis question was addressed to me in final exam.The doubt is from Monitoring and Control of Water Pollution in portion Water of Applied Chemistry

Coastal water shows major differences in ___________(a) Pollution(b) Sewage(c) Salinity(d) ConductivityThis question was posed to me in quiz.The query is from Monitoring and Control of Water Pollution topic in section Water of Applied Chemistry

COD can be determined in ___________(a) 1 Hour(b) 2 Hours(c) 3 Hours(d) 4 HoursThe question was asked in a job interview.This intriguing question comes from Reverse Osmosis, Ultrafilteration, COD and BOD in chapter Water of Applied Chemistry

The residual hardness after the treatment of water is about __________(a) 1 ppm(b) Less than 1ppm(c) 2 ppm(d) Less than 2pmmThis question was addressed to me during a job interview.I'd like to ask this question from Ion Exchange Process in division Water of Applied Chemistry

Reagent used in the lime soda process is _______(a) Regenerated(b) Not regenerated(c) Regenerated depending on the hardness(d) Regenerated some timesI have been asked this question in a job interview.Query is from Lime Washing Soda Method in section Water of Applied Chemistry

Total dissolved solids in the lime soda process is _________(a) Reduced(b) Not reduced(c) Remains same(d) Slightly reducedThe question was posed to me in an international level competition.My question is from Lime Washing Soda Method topic in portion Water of Applied Chemistry

Hardness of the water in the lime soda process is reduced to __________(a) 10-15ppm(b) 15-30ppm(c) 30-35ppm(d) 35-40ppmI had been asked this question in an interview for job.This intriguing question comes from Lime Washing Soda Method in portion Water of Applied Chemistry

The sodium soap will precipitate all the hardness causing ions into their respective __________(a) Carbonates(b) Bicarbonates(c) Stereates(d) ChloridesThis question was addressed to me in class test.My query is from Estimation of Hardness in division Water of Applied Chemistry

Chemical composition of the lake water is _________(a) Constant(b) Not constant(c) Some times constant(d) Cannot be determinedI had been asked this question in homework.This key question is from Sources, Impurities and Hardness of Water in section Water of Applied Chemistry

Amino acids comes under _________ impurity.(a) Dissolved impurity(b) Colloidal impurity(c) Dissolved gases(d) Bacterial impuritiesI got this question by my school teacher while I was bunking the class.My doubt is from Sources, Impurities and Hardness of Water in chapter Water of Applied Chemistry

___________ is the purest form of the water obtained by natural distillation.(a) Under ground water(b) Sea water(c) River water(d) Rain waterThe question was posed to me in an interview.My question is based upon Sources, Impurities and Hardness of Water in portion Water of Applied Chemistry

Amoebic dysentery is caused by ___________(a) Viruses(b) Bacteria(c) Helminth(d) ProtozoaThe question was asked during an online exam.My query is from Types of Water Pollutants and Effects in chapter Water of Applied Chemistry

Infectious hepatitis is caused by ___________(a) Bacteria(b) Viruses(c) Protozoa(d) HelminthI have been asked this question in quiz.My doubt stems from Types of Water Pollutants and Effects topic in section Water of Applied Chemistry

Ion exchange process is also called as ___________(a) Permutit’s process(b) Demineralization(c) Zeolite process(d) Lime soda processI got this question in an internship interview.The question is from Ion Exchange Process in division Water of Applied Chemistry

How many steps are involved in the zeolite process?(a) 4(b) 3(c) 2(d) 1This question was addressed to me in an online quiz.My question comes from Permutit’s Process topic in division Water of Applied Chemistry

The capital cost of the zeolite process is ___________(a) Less(b) High(c) Very high(d) Very lowI got this question in a job interview.My question comes from Permutit’s Process in division Water of Applied Chemistry

The BOD value of the food industry is about ___________(a) 742(b) 743(c) 744(d) 745I got this question in a national level competition.My question is taken from Methods of Reducing Water Pollution in chapter Water of Applied Chemistry

In sewage the waste is about ___________(a) 0.01(b) 0.02(c) 0.03(d) 0.05I got this question in class test.I'd like to ask this question from Reverse Osmosis, Ultrafilteration, COD and BOD topic in portion Water of Applied Chemistry

The optimum value in natural water is ________(a) 2-4ppm(b) 4-7ppm(c) 4-6ppm(d) 2-7ppmThis question was posed to me by my college director while I was bunking the class.Enquiry is from Types of Water Pollutants and Effects in section Water of Applied Chemistry

Very low hardness of __________ can be achieved in the zeolite process.(a) 3ppm(b) 4ppm(c) 5ppm(d) Less than 5ppmThe question was posed to me during an internship interview.I would like to ask this question from Permutit’s Process in portion Water of Applied Chemistry

The hardness in the ion exchange process is reduced to ___________(a) 0-1ppm(b) 0-2ppm(c) 0-3ppm(d) 0-4ppmThe question was asked in a job interview.I would like to ask this question from Ion Exchange Process in chapter Water of Applied Chemistry

The zeolite process is used for turbid process.(a) True(b) FalseThe question was asked during a job interview.This interesting question is from Permutit’s Process in section Water of Applied Chemistry

The standard hard water is prepared such that each ml must contain ________ mg of CaCO3.(a) 1(b) 2(c) 3(d) 4The question was posed to me in unit test.My doubt stems from Estimation of Hardness topic in chapter Water of Applied Chemistry

Estimation of hardness can be determined by ________ types.(a) 2(b) 3(c) 4(d) 5This question was posed to me during an interview.Origin of the question is Estimation of Hardness topic in portion Water of Applied Chemistry

Which of the following process does not remove the permanent hardness of water?(a) Lime-soda(b) Ion exchange process(c) Zeolite process(d) HeatingThe question was posed to me during a job interview.The origin of the question is Estimation of Hardness in section Water of Applied Chemistry

Which of the following does not cause the permanent hardness in water?(a) Nitrates(b) Sulphates(c) Chlorides(d) BicarbonatesI have been asked this question in final exam.My doubt is from Estimation of Hardness in section Water of Applied Chemistry

The organic matter in drinking water must be about _________(a) 0.2-1.0ppm(b) 1.0-2.0ppm(c) 2.0-3.0ppm(d) 3.0-4.0ppmThe question was posed to me by my school principal while I was bunking the class.I want to ask this question from Estimation of Hardness in division Water of Applied Chemistry

The PH value of the drinking water is about _________(a) 6.5-8.5(b) 5.5-6.5(c) 4.5-5.5(d) 3.5-4.5I had been asked this question in quiz.This key question is from Estimation of Hardness topic in section Water of Applied Chemistry

Soaps can be defined as the soap consuming capacity of the water sample.(a) True(b) FalseI have been asked this question by my school teacher while I was bunking the class.I'm obligated to ask this question of Estimation of Hardness topic in section Water of Applied Chemistry

The chemical oxygen demand can be given as __________(a) {[(V1-V2)*N*8]}/x(b) {[(V1+V2)*N*8]}/x(c) {[(V2-V1)*N*8]}/x(d) {[(V1/V2)*N*8]}/xI had been asked this question during an online interview.My query is from Problems, Units and Formulae topic in portion Water of Applied Chemistry

__________ co polymer can remove the chlorinated pesticides.(a) Styrene di vinyl benzene(b) Styrene(c) Benzoyl peroxide(d) PhenolI got this question in a national level competition.Question is taken from Reverse Osmosis, Ultrafilteration, COD and BOD topic in portion Water of Applied Chemistry

The organic matter present in the water is of __________ types.(a) Two(b) Three(c) Four(d) FiveThis question was posed to me in exam.I need to ask this question from Types of Water Pollutants and Effects in portion Water of Applied Chemistry

The chemical oxygen demand can be given as __________(a) {[(V1-V2)N8]}/x(b) {[(V1+V2)N8]}/x(c) {[(V2-V1)N8]}/x(d) {[(V1/V2)N8]}/xI had been asked this question during an online interview.My query is from Problems, Units and Formulae topic in portion Water of Applied Chemistry