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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

Correct Answer :

C. Detergent


Related Questions

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Neon gas is

A. Flammable in nature

B. Used in color discharge tube

C. Filled in lamps having tungsten filament

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

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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

Pick out the wrong statement pertaining to nitric acid.

A. About 90% of nitric acid is manufactured by Ostwald's process

B. It is a strong mono basic acid which reacts with almost all the metals except noble metals

C. Yellow color of impure nitric acid is because of dissolved oxides of nitrogen (mainly NO2)

D. Arc process of nitric acid manufacture is economical as compared to Ostwald's process

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Ordinary glass is not a/an

A. Amorphous isotropic material

B. Supercooled liquid

C. Material with sharp definite melting point

D. Electrical insulator

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Phenol formaldehyde

A. Employs addition polymerisation

B. Employs condensation polymerisation

C. Is a monomer

D. Is an abrasive material

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'Hollander beater' machine used in the paper manufacturing plant does not accomplish the task of

A. Final rolling out of paper

B. Cutting of fibres

C. Hydration of fibres

D. Fibrillation of fibre

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4

Linde process of gas liquefaction employs

A. Exchange of heat with colder stream

B. Adiabatic expansion through a throttle valve (Joule-Thomson expansion)

C. Adiabatic expansion against a piston or in a turbine

D. Merely compressing the gas beyond its critical pressure

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4

Which one of the following is not likely to be a constituent of vegetable oils?

A. Citric acid

B. Oleic acid

C. Stearic acid

D. Glycerol

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Salt is added in the kettle during soap manufacture to separate

A. Soap from lye

B. Glycerine from lye

C. The metallic soap

D. The unsaponified fat from soap

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During the manufacture of sulphuric acid, the temperature of molten sulphur is not increased beyond 160°C, as

A. It is very corrosive at elevated temperature

B. Its viscosity is not reduced on further heating (hence pressure drop on pumping it, cannot be further reduced)

C. It decomposes on further increasing the temperature

D. None of these

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Zeolite is used in the

A. Water treatment

B. Glass manufacture

C. Hydrogenation of fatty oil as a catalyst

D. Development of exposed photographic plate

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Fusel oil is a/an

A. Essential oil

B. Extract from medicinal herbs

C. Mixture of higher molecular weight alcohols (a by-product obtained during production of alcohol from molasses).

D. None of these

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4

Gun powder, which is an explosive comprises of charcoal, sulphur and

A. Glycerine

B. Salt petre

C. Nitro glycerine

D. Dynamite

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4

Commercial scale production of hydrogen from iron-steam reaction represented by, 3Fe + 3H2O = Fe3O4 + 4H2, is not practised, as it is

A. A slow reaction

B. A discontinuous reaction (requiring regeneration of iron by water gas intermittently)

C. Still in development stage (by employing fluidised bed technique)

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

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4

Pick out the wrong statement.

A. Conversion of SO2 to SO3 in Monsanto-4 pass converter is about 98%

B. The chemical formula of oleum is H2S2O7, which is formed by saturating sulphuric acid with sulphur trioxide

C. Vitriol oil is nothing but technical sulphuric acid

D. Decomposition of sulphuric acid on heating does not start before its boiling

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4

Which glass is usually used in optical work?

A. Lead glass

B. High silica (borosilicate) glass

C. Photo-sensitive glass

D. Fibre glass

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Saponification value/number of an oil or fat is a measure of its

A. Fatty acid content

B. Degree of unsaturation of the fatty acids present in it

C. Average molecular weight

D. Insoluble fatty acid content

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Which of the following impurities in feed water for high pressure boiler is the most detrimental?

A. Silica

B. Dissolved oxygen

C. Suspended salt

D. Dissolved salt

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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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Sulphuric acid saturated with SO3 is called

A. Concentrated H2SO4

B. Sulphurous acid

C. Oleum

D. None of these

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In the manufacture of sulphuric acid from elemental sulphur, the following sequence of major operations is followed:

A. Furnace → converter → absorber

B. Furnace → evaporator → absorber

C. Furnace → converter → evaporator

D. Converter → furnace → absorber

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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)

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Which of the following is an endothermic reaction?

A. Absorption of SO3 in 98% H2SO4

B. C + H2O = CO + H2

C. Thermal dissociation of iron pyrites

D. Both (B) and (C)

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Antibiotic

A. Inhibits/destroys the growth of microorganisms

B. Is used as a pain reliever

C. Is an antimalarial

D. Is an anaesthetic

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Brackish water which contains mostly dissolved salt, can be purified by the __________ process.

A. Reverse osmosis

B. Sand filter

C. Lime soda

D. Permutit

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Polythene is a/an __________ polymerisation product.

A. Addition

B. Condensation

C. Thermosetting

D. None of these

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Blue colour is imparted to glass by the addition of

A. FeSO4

B. PbO

C. CaO

D. NaOH

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Hydrogenation of edible vegetable oils

A. Is an exothermic reaction

B. Increases their melting point

C. Is done in presence of nickel catalyst

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

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4

Lithophane is

A. Explosive

B. White lead

C. Filter aid

D. ZnS (white pigment)

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Argon is the third largest constituent of air (followed by N2 & O2). Its percentage by volume in air is

A. 0.14

B. 0.34

C. 0.94

D. 1.4