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4

Calgon used in water treatment is chemically

A. Sodium phosphate

B. Sodium hexametaphosphate

C. Calcium phosphate

D. Tricresyl phosphate

Correct Answer :

B. Sodium hexametaphosphate


Related Questions

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The catalyst used in shift converter is

A. Nickel

B. Vanadium

C. Silica gel

D. Alumina

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4

Cation exchanger is regenerated usually with

A. NaOH

B. H2SO4

C. Hydrazine

D. Alum solution

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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

Esterification reaction produces

A. Detergent

B. Vanaspati

C. Soap

D. Mercaptans

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4

__________ is a thermosetting plastic.

A. Polythene

B. Epoxy polymer

C. P.V.C.

D. Polystyrene

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4

Black liquor is converted into white liquor by

A. Evaporation and burning the concentrate followed by causticisation of products

B. Multi-effect evaporation only

C. Selective liquid extraction

D. Extractive distillation

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4

Dehydrogenation of Isopropanol produces

A. Propyl alcohol

B. Acetone

C. Trichloroethylene

D. Formaldehyde

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4

With increase in temperature, the equilibrium constant at constant pressure (Kp) for oxidation of sulphur dioxide

A. Increases

B. Increases linearly

C. Decreases

D. Decreases linearly

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4

DDT stands for

A. Diethyl-diphenyl-trichloromethane

B. Dichloro-diphenyl-trichloromethane

C. diphenyl-dichloro-trichloromethane

D. Dichloro-diphenyl-trichloroethane

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4

Adipic acid is an intermediate in the manufacture of

A. Perspex

B. Nylon-66

C. Polystyrene

D. Bakelite

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4

Teflon is

A. Phenol formaldehyde

B. An inorganic polymer

C. Poly tetra-fluoro-ethylene (P.T.F.E.)

D. A monomer

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4

P.T.F.E. (Poly tetra fluoro ethylene) is commercially known as

A. Bakelite

B. Neoprene

C. Teflon

D. Nylon-66

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4

Raw materials used for producing __________ cement does not contain iron oxide.

A. Waterproof

B. Slag

C. White

D. Pozzolan

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4

Fish contains about __________ percent oil.

A. 5

B. 10

C. 20

D. 35

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Hydrophilic group of a soap or detergent solution is

A. Water hating

B. Soil loving

C. Water loving

D. None of these

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4

Percentage of alcohol in beer may be around __________ percent.

A. 2-8

B. 18-23

C. 27-32

D. 1-4

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Titanium dioxide is a/an __________ colour pigment.

A. White

B. Black

C. Yellow

D. Blue

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4

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 is obtained by the chlorination of ethyl alcohol

C. Insecticides acting on the insects through the respiratory system are called fumigants

D. Benzene hexachloride is not a contact insecticide

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4

During the absorption of HCl gas in water (to produce liquid HCl), the gas is kept above dew point to

A. Increase the rate of absorption

B. Avoid corrosion

C. Reduce the cooling water circulation rate

D. None of these

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4

Heating of __________ to 120°C, produces plaster of paris.

A. Blue vitriol

B. Gypsum

C. Calcium silicate

D. Calcium sulphate

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4

Carboxymethyl cellulose (CMC) is added in detergents to act as a/an

A. Surfactant

B. Builder

C. Optical brightening agent

D. Anti soil redeposition agent

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4

Pick out the wrong statement.

A. Low intensity explosives are also called propellants, whereas high intensity explosive are called detonators

B. Gun powder comprises of 75% salt petre, 15% charcoal and 10% sulphur

C. Lead azide is a popular military explosive

D. TNT is a hygroscopic explosive having very high melting point and is non-toxic to human being

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4

Viscosity index improver (like polystyrene or polyisobutylene) is added to lubricant to

A. Reduce its viscosity

B. Increase its viscosity

C. Reduce the variation in its viscosity with temperature

D. Increase the variation in its viscosity with temperature

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4

Economics of 'Solvay Process' depends upon the efficiency of

A. Carbonating tower

B. Ammonia recovery

C. Ammonia recovery and size of the plant

D. Ammoniation of salt solution

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4

Addition of calcium oxide to water produces

A. Exothermic heat

B. Hissing sound

C. Slaked lime

D. All (A), (B) & (C)

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4

__________ iron is the purest form of iron.

A. Cast

B. Wrought

C. Pig

D. High silicon

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4

Rotary kiln is not involved in the production of

A. Cement

B. Lime from limestone

C. Slaked lime from quick lime

D. None of these

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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

Flux addition during smelting of ore is done to

A. Remove impurities/gangue

B. Enhance rate of reaction

C. Accelerate reduction of ore

D. Separate slag from metal

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4

Trinitro-toluene (TNT) is

A. Used in glycerine manufacture

B. An explosive

C. Used in dye manufacture

D. None of these