__________ is an ore concentrating metallurgical process involving a chemical change.

Question

__________ is an ore concentrating metallurgical process involving a chemical change.

A. Electromagnetic separation

B. Froth floatation

C. Roasting

D. None of these

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Comment

Concentration of hydrogen peroxide is done by

A. Crystallisation

B. Vacuum crystallisation

C. Atmospheric distillation

D. Dehydration

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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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Bromides contained in hot mother liquor is treated with __________ during manufacture of bromine from sea water.

A. SO₃

B. Cl₂

C. NH₃

D. SO₂

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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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Deacon's method is used for the manufacture of

A. Glauber's salt

B. Common salt

C. Chlorine

D. Graphite electrode

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__________ process is used for the commercial production of nitric acid by the catalytic oxidation of ammonia.

A. Solvay

B. Ostwald's

C. Haber's

D. None of these

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Digestion of wood-base materials (for manufacture of pulp) is done to

A. Remove lignin

B. Produce long fibres

C. Prevent deterioration on storage

D. None of these

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20% oleum means that in 100 kg oleum, there are 20 kg of

A. SO₃ and 80kg of H₂SO₄

B. H₂SO₄ and 80kg of SO₃

C. SO₃ for each 100 kg of H₂SO₄

D. None of these

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Nylon-66 is so named because the

A. Average degree of polymerisation of the polymer is 1966

B. Number of carbon atoms between two nitrogen atoms are 6

C. Number of nitrogen atoms between two carbon atoms are 6

D. Polymer was first synthesised in 1966

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Which of the following processes does not produce Cl2 as a co-product during the manufacture of caustic soda?

A. Diaphragm electrolytic cell process

B. Mercury electrolytic cell process

C. Lime-soda process

D. None of these

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Trinitrotoluene (TNT), an explosive, is made by the nitration of

A. Nitrobenzene

B. Toluene

C. Nitrotoluene

D. Benzene

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__________ glass has the lowest co-efficient of thermal expansion and hence is more heat resistant.

A. Pyrex

B. Soda lime

C. Lead

D. High silica

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In an integrated steel plant, NH3 present in coke oven gas is normally recovered as

A. (NH₄)₂SO₄

B. NH₄Cl

C. (NH₄)₂ NO₃

D. Liquid NH₃

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A unit operation is exemplified by the process of

A. Reduction

B. Desorption

C. Nitration

D. Combustion

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Polymerisation product of C2F4 (carbon tetrafluoride) is called P.T.F.E (poly chloro tetra fluoro ethylene). It is also called

A. Polyurethane

B. Silicone

C. Teflon

D. Epoxy resin

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Plaster of Paris is

A. CaSO₄. ½H₂O

B. Used for setting of broken bones

C. Both (A) and (B)

D. Same as gypsum

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Which of the following is a detergent?

A. Benzene hexachloride

B. Alkyl benzene sulphonate

C. Polytetrafluoroethylene

D. Cellulose nitrate

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Chemical name of aspirin (an analgesic drug) is

A. Acetylsalicylic acid

B. Nictonic acid

C. Calcium acetate

D. Methyl salicylate

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High temperature carbonisation of coal produces

A. Inferior coke compared to low temperature carbonisation

B. Less of gases compared to liquid products

C. Larger quantity of tar compared to low temperature carbonisation

D. None of these

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Pick out the endothermic reaction out of the following.

A. C+ ½O₂ = CO

B. CO + 3H₂ = CH₄ + H₂O

C. CaCO₃ = CaO + CO₂

D. CO + ½O₂ = CO₂

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Carborundum consists mainly of

A. Bauxite

B. Silicon carbide

C. Boron carbide

D. Calcium carbide

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__________ glass is used for the manufacture of optical glass.

A. Pyrex

B. Soda

C. Flint

D. Crooke's

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Starting material for the production of styrene butadiene rubber (SBR) is

A. Ethyl alcohol

B. Ethylene

C. Both (A) & (B)

D. Neither (A) nor (B)

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Function of thinner in a paint is to

A. Accelerate the oxidation of oil

B. Prevent gelling of the paint

C. Suspend pigments & dissolve film forming materials

D. Form a protective film

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Esterification reaction produces

A. Detergent

B. Vanaspati

C. Soap

D. Mercaptans

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Which of the following, when pyrolysed, produces Perchloroethylene?

A. Ethylene dichloride

B. Chlorobenzene

C. Carbon tetrachloride

D. Chlorinated paraffin

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The catalyst used in the manufacture of DDT is

A. Alumina

B. Silica

C. 20% oleum

D. Aluminium chloride

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Penicillin is separated from fermented broth by

A. Extraction with amyl or butyl acetate

B. Ternary Azeotropic distillation

C. Evaporator in calandria

D. Extractive distillation

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Which of the following is not present in bagasse fibre?

A. Cellulose

B. Lignin

C. Pentogens

D. None of these

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Percentage of glycerine present in the spent lye obtained during soap manufacture is about

A. 0.5

B. 5

C. 20

D. 35

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Accepted Answer

C. Roasting

__________ is an ore concentrating metallurgical process involving a chemical change.

Correct Answer :

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Related Questions

Concentration of hydrogen peroxide is done by

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

Bromides contained in hot mother liquor is treated with __________ during manufacture of bromine from sea water.

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

Deacon's method is used for the manufacture of

__________ process is used for the commercial production of nitric acid by the catalytic oxidation of ammonia.

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20% oleum means that in 100 kg oleum, there are 20 kg of

Nylon-66 is so named because the

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__________ glass has the lowest co-efficient of thermal expansion and hence is more heat resistant.

In an integrated steel plant, NH3 present in coke oven gas is normally recovered as

A unit operation is exemplified by the process of

Polymerisation product of C2F4 (carbon tetrafluoride) is called P.T.F.E (poly chloro tetra fluoro ethylene). It is also called

Plaster of Paris is

Which of the following is a detergent?

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High temperature carbonisation of coal produces

Pick out the endothermic reaction out of the following.

Carborundum consists mainly of

__________ glass is used for the manufacture of optical glass.

Starting material for the production of styrene butadiene rubber (SBR) is

Function of thinner in a paint is to

Esterification reaction produces

Which of the following, when pyrolysed, produces Perchloroethylene?

The catalyst used in the manufacture of DDT is

Penicillin is separated from fermented broth by

Which of the following is not present in bagasse fibre?

Percentage of glycerine present in the spent lye obtained during soap manufacture is about

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