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Raw materials required for the manufacture of __________ is acetylene and hydrochloric acid.

A. Phthalic anhydride

B. Vinyl chloride

C. Maleic anhydride

D. Dacron

Correct Answer :

B. Vinyl chloride


Related Questions

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Vulcanisation of rubber

A. Decreases its tensile strength

B. Increases its ozone & oxygen reactivity

C. Increases its oil & solvent resistance

D. Converts its plasticity into elasticity

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The type of high refractive index glass used in optical instruments is __________ glass.

A. Pyrex

B. Flint

C. Crookes

D. None of these

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The main component of Pyrex glass is

A. Zinc

B. Lead

C. Boron

D. Selenium

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Coagulant is used __________ filtration.

A. Before

B. After

C. During

D. To avoid

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The most reactive allotropic form of phosphorus is __________ phosphorus.

A. Red

B. Yellow

C. Violet

D. Black

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Cellulose content of bamboo and ideal fibrous raw material for the manufacture of paper is __________ percent.

A. 10

B. 50

C. 80

D. 95

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Phenol formaldehyde resin is used as an adhesive in making

A. Laminates

B. Card boxes

C. Furniture

D. Books

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Conversion of SO2 to SO3 in Monsanto 4-pass converter is about __________ percent.

A. 80

B. 90

C. 98

D. 100

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__________ is used as a flux in the extraction of iron from iron ore (haematite) in blast furnace.

A. Bauxite

B. Limestone

C. Quartz

D. Manganese

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Maleic anhydride is produced by catalytic oxidation of

A. Toluene

B. Ethyl alcohol

C. Naphthalene

D. Benzene

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Pick out the true statement pertaining to water treatment.

A. Slow sand filters can remove colour completely

B. Activated carbon can be used for taste & odour control without subsequent filtration

C. Application of activated carbon reduces the temporary hardness of water

D. Normally, the turbidity is removed by adding a coagulant prior to sedimentation

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Contact process of sulphuric acid manufacture

A. Yields acid of higher concentration than chamber process

B. Yields acids of lower concentration than chamber process

C. Is obsolete

D. Eliminates absorber

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High acid value of an oil or fat is an indication of

A. Storage under improper conditions

B. Absence of unsaturation

C. Its smaller molecular weight

D. None of these

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Extraction of __________ employs an electrolytic process.

A. Aluminium

B. Silver

C. Copper

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

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Pick out the wrong statement.

A. Pasteurisation of milk involves moderate heating followed by cooling

B. Bakeries and breweries make use of yeasts

C. Enzyme is a complex nitrogenous compound

D. Oils and fats are alkaloids

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Which of the following is not a product of coal tar distillation?

A. Anthracene

B. Creosote oil

C. Carbolic oil

D. None of these

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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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Permanent hardness of water is due to the presence of calcium & magnesium

A. Bi-carbonates

B. Sulphates & chlorides

C. Carbonate

D. None of these

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Styrene (a monomer for the production of polystyrene) is commercially produced by

A. Catalytic dehydrogenation of ethyl benzene

B. Dehydration of ethyl alcohol followed by hydrogenation

C. Reacting ethylene oxide with acetaldehyde

D. Fermentation of starch

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Gun powder uses

A. Sulphur

B. Charcoal

C. Potassium nitrate

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

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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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Manufacture of phthalic anhydride uses __________ as a catalyst.

A. Ni

B. Cr

C. V2O5

D. Al2O3

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Bleaching powder (chemically known as calcium chloro hypochlorite) is commercially produced by the action of chlorine on

A. Slaked lime

B. Soda lime

C. Calcium perchlorate

D. None of these

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__________ paper is used in the manufacture of newsprint paper.

A. Ground-wood

B. Board

C. Tissue

D. Wrapping

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Which is the main reducing agent during production of iron from iron ore in a blast furnace?

A. C

B. CO

C. CO2

D. H2

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Which of the following is a bleaching agent added in the detergents to facilitate removal of stains caused due to blood, tea etc?

A. Sodium silicate

B. Sodium borate

C. Sodium tripolyphosphate (STPP)

D. Caustic soda

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The temperature in the calcium carbide furnace is __________ °C.

A. 200-300

B. 700-850

C. 2000-2200

D. 4000-4500

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The function of gypsum addition during cement making is to

A. Increase the density of cement

B. Decrease the cement setting rate

C. Both (A) and (B)

D. Neither (A) nor (B)

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Varnish does not contain

A. Thinner

B. Pigment

C. Both (A) & (B)

D. Neither (A) nor (B)

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Flash point of most vegetable oils is about __________ °C.

A. 50

B. 100

C. 200

D. 300