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
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
Description : Permanent hardness of water can be removed by (A) Simply boiling (B) Adding alum (C) Passing it through cation & anion exchangers (D) All (A), (B) and (C)
Last Answer : (C) Passing it through cation & anion exchangers
Description : 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 ... of water (D) Normally, the turbidity is removed by adding a coagulant prior to sedimentation
Last Answer : (D) Normally, the turbidity is removed by adding a coagulant prior to sedimentation
Description : Permanent - hardness of water may be removed by addition of – (1) Alum (2) Sodium carbonate (3) Lime (4) Potassium Permangante
Last Answer : (2) Sodium carbonate Explanation: Sodium carbonate (also known as washing soda or soda ash) is a sodium salt of carbonic acid. In domestic use, it is used as a water softener in laundering. It ... with the detergent being used. Sodium carbonate can be used to remove grease, oil and wine stains.
Description : Permanent – hardness of water may be removed by addition of (1) Alum (2) Sodium carbonate (3) Lime (4) Potassium Permangante
Last Answer : Sodium carbonate
Description : Which of the following processes can remove both temporary as well as permanent hardness of water? (A) Filtration (B) Boiling (C) Distillation (D) None of these
Last Answer : (C) Distillation
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
Description : Permanent hardness of water cannot be removed by (a) Boiling (b) Adding caustic soda (c) Distillation (d) Adding soda
Last Answer : Ans:(a)
Description : Permanent hardness of water can be removed by (A) Boiling (B) Adding Ca(OH)2 (C) Boiling it with Na2CO3 (D) None of these
Last Answer : (C) Boiling it with Na2CO3
Description : If water smells bad, then that odour can be removed by adding – (1) alum (2) bleach (3) activated carbon (4) deactivated nitrogen
Last Answer : (3) activated carbon Explanation: Adding powdered activated carbon to water or using of granular activated carbon (GAC) in the water filter can remove bad taste and foul odour. Powdered activated ... the activated carbon and retained, but the material doing the adsorption does not change size.
Description : If water smells bad, then that odour can be removed by adding - (1) alum (2) bleach (3) activated carbon (4) deactivated nitrogen
Last Answer : (3) activated carbon Explanation: Adding powdered activated carbon to water or using of granular activated carbon (GAC) in the water filter can remove bad taste and foulodor.
Description : If water smells bad, then that odour can be removed by adding (1) alum (2) bleach (3) activated carbon (4) deactivated nitrogen
Last Answer : activated carbon
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
Description : By boiling water, hardness can be removed if it is due to (A) Calcium sulphate (B) Magnesium sulphate (C) Calcium nitrate (D) Calcium bicarbonate
Last Answer : (D) Calcium bicarbonate
Description : Hardness of water can be removed by boiling if it is due to (A) Calcium bicarbonates (B) Calcium sulphates (C) Calcium chloride (D) Calcium nitrates
Last Answer : (A) Calcium bicarbonates
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
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)
Description : 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
Last Answer : (D) Chlorination
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
Description : The most ideal disinfectant used for drinking water throughout the world, is (A) Alum (B) Lime (C) Chlorine (D) Nitrogen
Last Answer : (C) Chlorine
Description : For controlling algae, the most commonly used chemical, is (A) Copper sulphate (B) Alum (C) Lime (D) Bleaching powder
Last Answer : (A) Copper sulphate
Description : Mostly used coagulant, is (A) Chlorine (B) Alum (C) Lime (D) Bleaching powder
Last Answer : (B) Alum
Description : To control the growth of algae in reservoirs, the compound which is used, is (A) Bleaching powder (B) Copper sulphate (C) Lime solution (D) Alum solution
Last Answer : (B) Copper sulphate
Description : In water treatment, alum [Al2 (SO4 )3 ] is used for the process of (A) Filtration (B) Coagulation (C) Sedimentation (D) Disinfection
Last Answer : (B) Coagulation
Description : Carbonates in water produce (A) Temporary hardness (B) Permanent hardness (C) Acidity (D) Alkanity
Last Answer : (A) Temporary hardness
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
Description : The most commonly used chemical coagulant in water treatment is (A) Ferrous sulphate (B) Alum (C) Lime (D) Hydrazine
Description : Which is the most widely used coagulant for the treatment of turbid water? (A) Alum (aluminium sulphate) (B) Lime (C) Ferric chloride (D) Sodium aluminate
Last Answer : (A) Alum (aluminium sulphate)
Description : Most widely and commonly used coagulant for the removal of suspended impurities in water is (A) Bleaching powder (B) Slaked lime (C) Alum (D) Copper sulphate
Last Answer : (C) Alum
Description : To remove very fine suspended particles from water, the method adopted is (A) Screening (B) Sedimentation (C) Boiling (D) Filtration
Last Answer : To remove very fine suspended particles from water, the method adopted is (A) Screening (B) Sedimentation (C) Boiling (D) Filtration
Description : In order to provide colour, hardness and strength to the cement, the ingredient used is (a) Lime (b) Solica (c) Alumina (d) Iron oxide
Last Answer : (d) Iron oxide
Description : Foul odour and bad taste of water is removed by treating with (A) Alum (B) Bleaching powder (C) Activated carbon (D) Copper sulphate
Last Answer : (C) Activated carbon
Description : Lime putty (A) Is made from hydraulic lime (B) Is made by adding lime to water (C) Can be used only upto three days (D) All of above
Last Answer : Answer: Option D
Description : Hydraulic lime is obtained by (A) Burning of lime stone (B) Burning of kankar (C) Adding water to quick lime (D) Calcination of pure clay
Last Answer : Answer: Option B
Description : Workability improved by adding (A) Fly ash (B) Hydrated lime (C) Calcium chloride (D) All the above
Description : The workability of concrete can be improved by adding (a) Hydrated lime (b) Fly ash (c) Calcium chloride (d) All the above
Last Answer : (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
Description : Temporary hardness of water is due to the presence of which thing? -General Knowledge
Last Answer : The answer is 'Magnesiumbicarbonate '
Last Answer : answer:
Description : The reaction involved during the removal of temporary hardness of water is:
Last Answer : The reaction involved during the removal of temporary hardness of water is: A. `2CaCl_(2)+(NaPO_(3))_ ... (Delta)rarrCaCO_(3)+H_(2)O+CO_(2)darr`
Description : The temporary hardness of water is due to :
Last Answer : The temporary hardness of water is due to : A. `CaCl_(2)` B. `Ca(HCO_(3))_(2)` C. NaCl D. `Na_(2)SO_(4)`
Description : Temporary hardness of water is due to the presence of which salts?
Last Answer : Bicarbonates of Calcium & Magnesium
Description : Temporary hardness of water can be re- moved by?
Last Answer : repeated boiling or adding lime
Description : Temporary hardness of water is due to the presence of?
Last Answer : bicarbonates of calcium and magnesium
Description : Which compounds are responsible for permanent and temporary hardness of water?
Last Answer : Ans-Permanent hardness is due to chlorides and sulphates of calcium and magnesium While temporary hardness is due to bicarbonates of calcium and magessium.
Description : Name the method used to remove temporary hardness of water?
Last Answer : Ans-Clark s method OR By Boiling
Description : Presence of __________ hardness is responsible for the temporary hardness in water. (A) Carbonate (B) Calcium (C) Chloride (D) Sulphate
Last Answer : (B) Calcium
Description : . Presence of iron and manganese in water causes (A) Reduction in its dissolved oxygen content (B) Discoloration of bathroom fixtures (C) Temporary hardness (D) None of these
Last Answer : (B) Discoloration of bathroom fixtures