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What is the correct answer?

4

Drinking (potable) water treatment does not involve

A. Coagulation

B. Sedimentation

C. Softening

D. Disinfection

Correct Answer :

C. Softening


Related Questions

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4

The process involved in converting rubber into a thin sheet or coating it on fabric is called

A. Extrusion

B. Mastication

C. Calendaring

D. Vulcanisation

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4

Fish contains about __________ percent oil.

A. 5

B. 10

C. 20

D. 35

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4

Multistage catalytic converter is not used in the

A. Conversion of SO2 to SO3

B. NH3 synthesis reaction

C. Both (A) and (B)

D. Neither (A) nor (B)

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4

Starting raw material for the manufacture of alum is

A. Alumina

B. Gypsum

C. Bauxite

D. Ammonium bicarbonate

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4

Poly Tetrafluoroethylene (P.T.F.E.) is known as

A. Bakelite

B. Teflon

C. Celluloid

D. Dacron

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4

Pick out the wrong statement.

A. Hard glass which is used for making laboratory glass wares is a mixture of sodium borosilicate and aluminium borosilicate

B. Glass is decolorized during its manufacture by adding antimony oxide, manganese dioxide or arsenic oxide

C. Ordinary glass is represented chemically by Na2O . CaO . 6SiO2

D. Red color is imparted to glass by addition of arsenic oxide

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4

Calcareous & argillaceous materials are used in the manufacture of

A. Lead

B. Cement

C. Carbon disulphide

D. None of these

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4

Glycerine is a by-product of the __________ industry.

A. Soap

B. Detergent

C. Oil hydrogenation

D. Paint

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4

Flexible foam (for mattresses) is usually made of

A. PVC

B. Silicone

C. Polyurethanes

D. Polyamides

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4

Ore concentration by froth floatation utilises the __________ of ore particles.

A. Density difference

B. Wetting characteristics

C. Terminal velocities

D. None of these

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4

The end bleaching agent used to move last traces of colour bodies from the pulp is

A. Chlorine dioxide (ClO2)

B. MgO

C. SO2 gas

D. Mercaptans

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4

__________ is a thermosetting plastic.

A. Polyvinyl chloride

B. Polythene

C. Bakelite

D. Teflon

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4

Alkylbenzene sulfonate (ABS) is a

A. Detergent

B. Rubber

C. Pesticide

D. Polyester

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4

Carborundum consists mainly of

A. Bauxite

B. Silicon carbide

C. Boron carbide

D. Calcium carbide

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4

Rancidity of the fatty oil can be reduced by its

A. Decoloration

B. Hydrogenation

C. Oxidation

D. Purification

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4

Sugar content in sugarcane on cane basis is about __________ percent by weight.

A. 1 to 5

B. 5 to 10

C. 15 to 20

D. 20 to 30

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4

Nitrile rubber is produced by the polymerisation of

A. Acrylonitrile and butadiene

B. Acrylonitrile and styrene

C. Isobutylene and isoprene

D. None of these

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4

Average sulphur content in Indian pyrites is about __________ percent.

A. 15

B. 35

C. 55

D. 70

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4

Hydrazine is largely used

A. As a starting material for 'hypo'

B. In photographic industry

C. As rocket fuel

D. In printing industry

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4

In the production of soda ash by Solvay process, the by-product is

A. CaCl2

B. NH4Cl

C. NH3

D. NaOH

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4

Alcohol content in freshly prepared natural and fortified wine may be respectively around __________ percent.

A. 7-14 and 14-30

B. 7-14 and 40-50

C. 14 - 30 and 40-50

D. 10 - 20 and 40 - 50

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4

Drinking (potable) water treatment does not involve

A. Coagulation

B. Sedimentation

C. Softening

D. Disinfection

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4

In the Solvay process, the product from the calciner is

A. Light soda ash

B. Dense soda ash

C. Sodium bicarbonate

D. Dehydrated soda ash

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4

Sucrose is a

A. Monosaccharide

B. Disaccharide

C. Polysaccharide

D. None of these

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4

Which of the following is used as a coagulant in treating turbid water?

A. Chlorine

B. Ferric sulphate

C. Calcium sulphate

D. Activated carbon

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4

The catalyst used in the manufacture of DDT is

A. Alumina

B. Silica

C. 20% oleum

D. Aluminium chloride

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4

A good quality coal should have

A. Low fusion point of ash

B. High ash content

C. High sulphur content

D. None of these

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4

Starting material for the production of butadiene in India is

A. Naphthalene

B. Benzol

C. Ethyl alcohol

D. Phthalic anhydride

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4

Exothermic neutralisation reaction between caustic soda and dodecylbenzene sulfonic acid produces sodium dodecylbenzene sulphate, which is a/an

A. Explosive

B. Soap

C. Detergent

D. Analgesic drug

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4

The process used for the manufacture of ethyl alcohol from molasses is

A. Distillation

B. Dehydration

C. Dehydrogenation

D. None of these