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4

Cumene (isopropyl benzene) is made by

A. Oxidation of naphthalene

B. Propylene alkylation of benzene

C. Polymerisation of a mixture of benzene & propylene

D. None of these

Correct Answer :

B. Propylene alkylation of benzene


Related Questions

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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

Terylene is

A. Same as Dacron

B. A polyester

C. Both (A) & (B)

D. Neither (A) nor (B)

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4

The difference between saponification value and acid value is

A. Called ester value

B. Always negative

C. Constant for all fatty oils

D. None of these

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4

Fermentator temperature during production of alcohol from molasses is around __________ °C.

A. 5

B. 30

C. 130

D. 300

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4

The most reactive allotropic form of phosphorus is __________ phosphorus.

A. Red

B. Yellow

C. Violet

D. Black

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4

Bakelite is chemically known as

A. Polyvinyl chloride (PVC)

B. Polybutadiene

C. Phenol formaldehyde

D. Polyurethane

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4

Which of the following is not produced on commercial scale from sea water?

A. Bromine

B. Magnesium compounds

C. Potassium compounds

D. Sodium sulphate

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4

Vanillin is a type of

A. Anti-pyretic drug

B. Food preservative

C. Flavour

D. Dye

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4

Co-efficient of thermal expansion of glass is decreased by the addition of __________ during its manufacture.

A. CaO

B. MnO2

C. ZnO

D. FeS

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4

Na2CO3.10H2O is called

A. Washing soda

B. Soda ash

C. Slaked lime

D. Quicklime

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4

Which of the following processes can remove both temporary as well as permanent hardness of water?

A. Filtration

B. Boiling

C. Distillation

D. None of these

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4

Ultimate analysis of coal determines its __________ content.

A. Carbon, hydrogen, nitrogen & sulphur

B. Carbon, ash, sulphur & nitrogen

C. Carbon, sulphur, volatile matter & ash

D. Carbon, volatile matter, ash & moisture

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4

Free alkali in a toilet soap is __________ that in a laundry shop.

A. Less than

B. More than

C. Same

D. None of these

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4

Concentration of hydrogen peroxide is done by

A. Crystallisation

B. Vacuum crystallisation

C. Atmospheric distillation

D. Dehydration

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4

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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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

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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4

Salt is the basic raw material for the manufacture of

A. Cement

B. Glass

C. Potteries

D. Caustic soda

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4

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

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4

Unsaturated oils compared to saturated oils have

A. Lower melting point & higher reactivity to oxygen

B. Higher melting point & higher reactivity to oxygen

C. Lower melting point & lower reactivity to oxygen

D. Higher melting point & lower reactivity to oxygen

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4

The main aim behind cooling the digested chip at the bottom portion of the digestor by injecting cold black liquor is to

A. Avoid mechanical weakening of fibre

B. Remove lignin by way of crystallisation

C. Increase the cellulose content

D. None of these

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4

Which of the following is not a raw material used for the manufacture of ordinary glass?

A. Iron oxide

B. Soda ash

C. Limestone

D. Silica

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4

Conversion of CO to CO2 by steam in presence of a catalyst is called

A. Steam reforming

B. Shift conversion

C. Steam gasification

D. None of these

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4

Fusion of limestone and __________ produces high alumina cement.

A. Sand

B. Bauxite

C. Quicklime

D. Calcite

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4

Which of the following is a detergent?

A. Benzene hexachloride

B. Alkyl benzene sulphonate

C. Polytetrafluoroethylene

D. Cellulose nitrate

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4

Concentration of NaOH solution produced by diaphragm electrolytic cell is about __________ percent.

A. 10

B. 25

C. 50

D. 98

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4

Which of the following is a detergent?

A. Fatty alcohol

B. Alkyl benzene sulphonate (ABS)

C. Fatty acids

D. Methylene chloride

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4

Nylon-6 is a

A. Polyamide

B. Thermosetting resin

C. Polyester

D. None of these

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4

SO2 is bubbled through hot sugar cane juice to

A. Act as an acidifying agent

B. Increase its concentration

C. Increase the amount of molasses

D. Increase the crystal size

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4

The metallic aluminium is obtained from pure alumina in the presence of fused cryolite by

A. Electrolysis

B. Electrolytic reduction

C. Electrolytic oxidation

D. None of these