The destruction of water-borne pathogens is termed as disinfection of
water. Which of the following is a water disinfectant?
(A) Chlorine
(B) Alkalis
(C) Benzene hexachloride
(D) Alkyl benzene sulphonate (ABS)

1 Answer

Answer :

(A) Chlorine

Related questions

Description : Which of the following is a detergent? (A) Benzene hexachloride (B) Alkyl benzene sulphonate (C) Polytetrafluoroethylene (D) Cellulose nitrate

Last Answer : (B) Alkyl benzene sulphonate

Description : Presence of non-biodegradable substances, like alkyl benzene sulphonate (ABS) from the detergents in polluted water stream causes (A) Fire hazards (B) Explosion hazards (C) Persistent foam (D) Depletion of dissolved oxygen

Last Answer : (C) Persistent foam

Description : Which of the following is a detergent? (A) Fatty alcohol (B) Alkyl benzene sulphonate (ABS) (C) Fatty acids (D) Methylene chloride

Last Answer : (B) Alkyl benzene sulphonate (ABS)

Description : Aryl benzene sulphonate (ABS) is a (A) Detergent (B) Plasticiser for unsaturated polyester (C) Starting material for the synthesis of glycerine (D) Coating ingredient for photographic film

Last Answer : (A) Detergent

Description : common disinfectant used in village wells for disinfection of water is (A) Free chlorine (B) Bromine (C) Iodine (D) Potassium permanganat

Last Answer : Option D

Description : A common disinfectant used in village wells for disinfection of water is (A) Free chlorine (B) Bromine (C) Iodine (D) Potassium permanganate

Last Answer : Option D

Description : Disinfection of water is done to destroy pathogenic bacteria and thus prevent water-borne diseases. Disinfection of water may be done by the use of (A) Ozone and iodine (B) Chlorine or its compounds (C) Ultraviolet light for irradiation of water (D) All (A), (B) & (C)

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

Description : The most popular and common detergent i.e., alkyl benzene sulfonate (ABS) is a/an __________ detergent. (A) Cationic (B) Anionic (C) Amphoteric (D) Semi polar

Last Answer : (B) Anionic

Description : Chlorination of benzene is done to produce benzene hexachloride (a pesticide) in a photochemical reactor lined with (A) Karbate (B) Lead or glass (C) Fireclay bricks (D) PVC

Last Answer : (B) Lead or glass

Description : Pick out the wrong statement. (A) DDT is manufactured by the condensation of chlorobenzene with chloral at 30°C in presence of oleum, which is a highly exothermic reaction (B) Chloral ... through the respiratory system are called fumigants (D) Benzene hexachloride is not a contact insecticide

Last Answer : (D) Benzene hexachloride is not a contact insecticide

Description : Lindane is (A) Not a fumigant (B) BHC (Benzene Hexachloride) containing 99% γ-isomer (C) A by-product of BHC manufacture (D) Both (B) and (C)

Last Answer : (B) BHC (Benzene Hexachloride) containing 99% γ-isomer

Description : BHC (Benzene hexachloride) is made by the chlorination of benzene (A) Which is an addition reaction (B) Which is a substitution reaction (C) In absolute dark (D) In presence of sunlight

Last Answer : (A) Which is an addition reaction

Description : Which is TRUE about disinfectant solutions:** A. It destroys all pathogenic micro organism including high resistant B. It reduces the number of micro organism to a non infective level C. It kills all pathogens but not spores.

Last Answer : B. It reduces the number of micro organism to a non infective level

Description : 442.Which is TRUE about disinfectant solutions:** A. It destroys all pathogenic micro organism including high resistant B. It reduces the number of micro organism to a non infective level C. It kills all pathogens but not spores.

Last Answer : B. It reduces the number of micro organism to a non infective level

Description : The process of destroying pathogens on an object is _____. a. Disinfection b. Sanitization c. Sepsis d. Antiseptic

Last Answer : a. Disinfection

Description : Which of the following statements are correct ? (i) Benzene hexachloride (BHC) is a non-biodegradable pollutant. (ii) Anthropogenic air pollutants are

Last Answer : Which of the following statements are correct ? (i) Benzene hexachloride (BHC) is a non-biodegradable pollutant. (ii) ... b B. a,c C. b,c D. c,d

Description : Chemical name of Gammaxane is - (1) Toluene (2) Chloro benzene (3) Aniline (4) Benzene hexachloride

Last Answer : (4) Benzene hexachloride Explanation: Gammexane is an insecticide that is the gamma isomer of benzene hexachloride. It is also known as lindane. Benzene hexachloride is any of several stereoisomers of 1,2,3,4,5,6- hexachlorocyclohexane formed by the lightinduced addition of chlorine to benzene.

Description : Chemical name of Gammaxane is (1) Toluene (2) Chloro benzene (3) Aniline (4) Benzene hexachloride

Last Answer : Benzene hexachloride

Description : Trichoderma harzianum has proved a useful microorganism for (a) gene transfer in higher plants (b) biological control of soil-borne plant pathogens (c) bioremediation of contaminated soils (d) reclamation of wastelands.

Last Answer : (b) biological control of soil-borne plant pathogens

Description : Which of the following is the most lethal water pollutant? (A) Phenol and cyanide (B) Chlorine (C) Alkalis (D) Suspended solids

Last Answer : (A) Phenol and cyanide

Description : Complete destruction of the microorganisms is commonly known as A- disinfection B- sterilization C- antisepsis D- none of these

Last Answer : antisepsis

Description : Which of the following is the most widely used disinfectant in water treatment? (A) Chlorine (B) Irradiation of water by ultraviolet light (C) Cation exchanger (D) Coagulation

Last Answer : (A) Chlorine

Description : Dose of chlorine for disinfection of water is about __________ mg/litre of water. (A) 0.01 (B) 0.1 (C) 0.3 (D) 1

Last Answer : (D) 1

Description : A gas used as a disinfectant in drinking water is - (1) Hydrogen (2) Oxygen (3) Fluorine (4) Chlorine

Last Answer : (4) Chlorine Explanation: Water chlorination is the process of adding chlorine or chlorine compounds such as sodium hypochlorite to water.

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 : The amount of Chlorine available in water after disinfection is called as – (1) free chlorine (2) residual chlorine (3) free available chlorine (4) combined available chlorine

Last Answer : (2) residual chlorine Explanation: The word "residual" means "remainder" or "that which is left", and as the name suggests the chlorine residual is measure of the amount of chlorine ... system. Tests for chlorine residual are probably the most frequently performed tests at water treatment plants.

Description : Disinfection of water with ozone is not good because  (A) It vanishes before water reaches the consumers  (B) It removes the colour, taste and odour from water as bacterias  (C) It adds taste to the water (D) It is more efficient than chlorine in killing bacterias 

Last Answer : (D) It is more efficient than chlorine in killing bacterias 

Description : The amount of chlorine available in water after disinfection is called as (1) free chlorine (2) residual chlorine (3) free available chlorine (4) combined available chlorine

Last Answer : residual chlorine

Description : Which of the following is not a correct statement concerning the FriedelCrafts acylation of benzene? (a) An alkyl group substitutes for a hydrogen. (b) The benzene ring attacks an acylium ion. (c) The acylium ion is resonance stabilized. (d) The acylium ion is often produced from an acyl chloride.

Last Answer : An alkyl group substitutes for a hydrogen

Description : Which of the following chemicals are halogens used for disinfection? a. Phenol b. Alcohol c. Detergent d. Chlorine

Last Answer : d. Chlorine

Description : Which of the following best describes the carbon-chlorine bond of an alkyl chloride? (a) nonpolar; no dipole (b) polar; δ+ at carbon and δ– at chlorine (c) polar; δ– at carbon and δ+ at chlorine (d) ionic

Last Answer : polar; δ+ at carbon and δ– at chlorine

Description : Pick out the wrong statement. (A) For the manufacture of styrene, the major raw materials are benzene and ethylene (B) One important copolymer of styrene is SBR, which is widely ... D) Phenol manufacture by chlorobenzene-caustic process is competitive even when low cost chlorine is not available

Last Answer : (D) Phenol manufacture by chlorobenzene-caustic process is competitive even when low cost chlorine is not available

Description : . Reaction of benzene with chlorine gas to produce tri-chlorobenzene exemplifies a/an __________ reaction. (A) Elementary (B) Parallel (C) Consecutive (D) None of these

Last Answer : (C) Consecutive

Description : Pick out the wrong statement. (A) Catalytic hydrogenation of carbon monoxide produces methyl alcohol (B) In nylon-6, the number 6 represents the total number of carbon atoms in the ring (C ... are benzene and chlorine (D) Ethanolamines are produced by using ammonia and ethylene oxide as raw material

Last Answer : (C) Raw materials for DDT manufacture are benzene and chlorine

Description : What happens when I treat benzene with chlorine and water?

Last Answer : It creates chlorine gas, which is very toxic. may I ask why you are asking?

Description : Which of the following reagents is most suitable for preparing chlorobenzene from benzene? (a) Aqueous chlorine (b) Chlorine in the presence of ultraviolet light (c) Chlorine in acetic acid (d) Chlorine in the presence of FeCl3

Last Answer : Chlorine in the presence of FeCl3

Description : Benzene reacts with chlorine in the presence of FeCl3 catalyst to form (a) Hexachlorobenzene (b) Chlorobenzene (c) Hexachlorocyclohexane (d) Benzyl chloride

Last Answer : Chlorobenzene

Description : What purpose does FeCl3 serve in the electrophilic aromatic substitution reaction between chlorine and benzene? (a) It serves as a radical initiator to produce the chlorine radical needed to propagate the ... by reacting with the Cl2 and thereby activates it toward attack by benzene's π electrons.

Last Answer : It serves as a Lewis acid catalyst by reacting with the Cl2 and thereby activates it toward attack by benzene’s π electrons.

Description : Dacron (or Treylene) fibres as compared to nylon fibres have (A) Better heat & acid resistant properties (B) Poorer resistance to alkalis (C) Poorer dyeability (D) All (A), (B) and (C)

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

Description : Wrought iron is a suitable material of construction for handling __________ solutions (A) Dilute acidic (B) Concentrated acidic (C) Alkalis & alkaline (D) None of these

Last Answer : (C) Alkalis & alkaline

Description : Wrought iron is a suitable material of construction for handling __________ solutions. (A) Dilute acidic (B) Concentrated acidic (C) Alkalis & alkaline (D) None of these

Last Answer : (C) Alkalis & alkaline

Description : Hastelloy C is a good material of construction in chemical process industry, since it is (A) Highly corrosion resistant and is readily fabricated (B) Relatively inexpensive although it can be ... most alkalis, particularly because of its copper content (D) Light and resists attack by acids

Last Answer : (D) Light and resists attack by acids

Description : Berl saddle made of carbon cannot be used for (A) Alkalis (B) SO2 (C) H2SO4 (D) Oxidising atmosphere

Last Answer : (D) Oxidising atmosphere

Description : Raschig ring made of porcelain cannot be used for treating concentrated (A) Hydrochloric acid (B) Nitric acid (C) Alkalis (D) Sulphuric acid

Last Answer : (C) Alkalis

Description : Dacron (or Terylene) fibres as compared to nylon fibres have (A) Better heat & acid resistant properties (B) Poorer resistance to alkalis (C) Poorer dyeability (D) All (A), (B) and (C)

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

Description : Main use of hydrazine is (A) As a rocket fuel (B) In water treatment (C) As a disinfectant (D) As fire retardant

Last Answer : (A) As a rocket fuel

Description : Irradiation of water by ultraviolet light of suitable wavelength iscommonly used for disinfection of water in (A) Food industry (B) Municipal sewage treatment (C) Petroleum refinery (D) Iron & steel plant

Last Answer : (A) Food industry

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 : Removal of __________ results from the disinfection of water. (A) Turbidity (B) Odour (C) Hardness (D) Bacteria

Last Answer : (D) Bacteria

Description : Infective bacteria in water is killed by the __________ process. (A) Sterilisation (B) Aeration (C) Disinfection (D) None of these

Last Answer : (A) Sterilisation