Raw water treated with only chlorine, is known as (A) Plain chlorination (B) Pre-chlorination (C) First-chlorination (D) De-chlorination

Raw water treated with only chlorine, is known as
(A) Plain chlorination
(B) Pre-chlorination
(C) First-chlorination
(D) De-chlorination
by

1 Answer

Answer :

(A) Plain chlorination
by

Related questions

For plain chlorination of water, the quantity of chlorine used, is (A) 0.1 mg/litre (B) 0.2 mg/litre (C) 0.3 mg/litre (D) 0.5 mg/litre

Description : For plain chlorination of water, the quantity of chlorine used, is (A) 0.1 mg/litre (B) 0.2 mg/litre (C) 0.3 mg/litre (D) 0.5 mg/litre

Last Answer : (D) 0.5 mg/litre

Standard process of chlorination of water, is done by (A) Plain chlorination (B) Pre-chlorination (C) Post-chlorination (D) Double chlorination

Description : Standard process of chlorination of water, is done by (A) Plain chlorination (B) Pre-chlorination (C) Post-chlorination (D) Double chlorination

Last Answer : (C) Post-chlorination

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 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 used in the manufacture of automobile tyres (C) Manufacture of phenol by chloroben-zene-eaustic process involves. The chlorination of benzene, causticisation and hydrolysis (D) Phenol manufacture by chlorobenzene-caustic process is competitive even when low cost chlorine is not available

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

Which of the following reasons are responsible for adoption of post-chlorination of water? 1. Chlorine demand is reduced. 2. Possibility of taste and odour formation is reduced. 3. Possibility of carcinogenic compounds is reduced. 4. Chloramines are formed. (a) 1, 2, 3 & 4 (b) 1, 2 & 3 only (c) 1, & 4 only (d) 2, 3 & 4 only

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Last Answer : (c) 1, & 4 only

Plain chlorination is used for water (A) Obtained from clear lakes (B) Consumed during emergencies (C) Supplies to armies during war (D) All the above

Description : Plain chlorination is used for water  (A) Obtained from clear lakes  (B) Consumed during emergencies  (C) Supplies to armies during war  (D) All the above 

Last Answer : (D) All the above 

At break point of chlorination, (A) Chlorine is used to oxidise (B) Residual chloride is zero (C) Residual chloride is maximum (D) Residual chlorine reappears

Description : At break point of chlorination, (A) Chlorine is used to oxidise (B) Residual chloride is zero (C) Residual chloride is maximum (D) Residual chlorine reappears

Last Answer : (D) Residual chlorine reappears

At break point of chlorination, (A) Chlorine is used to oxidise (B) Residual chloride is zero (C) Residual chloride is maximum (D) Residual chlorine reappears

Description : At break point of chlorination,  (A) Chlorine is used to oxidise  (B) Residual chloride is zero  (C) Residual chloride is maximum  (D) Residual chlorine reappears 

Last Answer : (D) Residual chlorine reappears 

The most commonly used chemical for de-chlorination of water, is (A) Sodium thiosulphate (B) Sodium bisulphate (C) Sodium sulphite (D) Sulphur-dioxide

Description : The most commonly used chemical for de-chlorination of water, is  (A) Sodium thiosulphate  (B) Sodium bisulphate  (C) Sodium sulphite  (D) Sulphur-dioxide 

Last Answer : (C) Sodium sulphite 

'Chlorination' is 1. A process of converting chlorides into chlorine 2. Adding small amounts of chlorine to impure water 3. A chemical reaction in which chlorine is formed 4. An addition reaction of ethylene and chlorine The correct statements are: (a) 1 and 4 (b) 2 and 4 (c) 3 and 4 (d) 1 and 2

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Last Answer : Ans:(b)

In the chlorination of alkanes, the first step in which chlorine free radicals are produced is called (a) initiation(b) activation(c) propagation(d) deactivation:

Description : In the chlorination of alkanes, the first step in which chlorine free radicals are produced is called : (a) initiation (b) activation (c) propagation (d) deactivation

Last Answer : initiation

Chlorination of treated waste water is required for

Description : Chlorination of treated waste water is required for

Last Answer : Chlorination of treated waste water is required for A. Killing all microbes B. Removing suspended ... breakdown of organic matter D. All the above

Chlorination of treated waste water is required for

Description : Chlorination of treated waste water is required for

Last Answer : Chlorination of treated waste water is required for A. Killing all microbes B. Removing suspended ... breakdown of organic matter D. All the above

Which of the following has high tensile strength? (A) Plain hot rolled wires (B) Cold drawn wires (C) Heat treated rolled wires (D) All have same tensile strength

Description : Which of the following has high tensile strength? (A) Plain hot rolled wires (B) Cold drawn wires (C) Heat treated rolled wires (D) All have same tensile strength

Last Answer : Answer: Option B

Chlorination of water does not remove (A) Ammonia content (B) B.O.D. (C) Organic matter content (D) Dissolved oxygen

Description : Chlorination of water does not remove (A) Ammonia content (B) B.O.D. (C) Organic matter content (D) Dissolved oxygen

Last Answer : (D) Dissolved oxygen

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 

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 

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

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

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

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

Last Answer : (B) Aeration

Ammonium chloride solution is stored/ treated in __________ vessels/pipes. (A) Plain carbon steel (B) Stainless steel (C) Rubber or durmet-20 lined (D) Lead

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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

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How long does it take chlorine to dissipate from treated water?

Description : How long does it take chlorine to dissipate from treated water?

Last Answer : 24 hours should do it.

Water of often treated with chlorine to

Description : Water of often treated with chlorine to

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Municipal water in India is generally treated with (a) Chlorine (b) Potassium permanganate (c) Sodium Chloride (d) Sodium Carbonate

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Last Answer : Ans:(a)

Maximum permissible residual chlorine in treated water should be __________ mg/litre. (A) 0.001 to 0.01 (B) 0.2 to 0.3 (C) 2 to 3 (D) 5 to 10

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Last Answer : (B) 0.2 to 0.3

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

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Explain pre-emphasis and de-emphasis concept in FM.

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What positional isomers of pentachlorobenzene are formed during chlorination of benzene?

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Salmonellae can also be killed by A- Pasteurization B- Chlorination C- .boiling D- all of these

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