Main constituent of limestone is

Question

Main constituent of limestone is

A. CaCO₃

B. MgCO₃

C. Na₂CO₃

D. CaSO₄

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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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__________ of quicklime produces slaked lime.

A. Hydration

B. Dehydration

C. Hydrogenation

D. None of these

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Which of the following is the most adverse factor challenging the choice of mercury electrolytic cell process for the production of caustic soda?

A. High cost of mercury

B. High specific gravity of mercury

C. Non-availability of high purity mercury

D. Pollution of water stream by mercury

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Glycerine can be obtained from

A. Fat

B. Naphthalene

C. Cumene

D. Sucrose

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The most widely used coagulant for removing suspended impurities from water is

A. Bleaching powder

B. Chlorine

C. Calcium sulphate

D. Alum

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Alum is commercially produced from

A. Gypsum

B. Feldspar

C. Galena

D. Bauxite

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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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Hydrolysis of sugar is called

A. Hydration

B. Inversion

C. Esterification

D. None of these

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Laboratory glass wares which reacts with hydrofluoric acid, are made of the __________ glass.

A. Lead

B. Borosilicate

C. Soda lime

D. Alkali silicate

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Chemical name of 'alum' is

A. Barium sulphate

B. Aluminium sulphate

C. Aluminium chloride

D. Calcium sulphate

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Temporary hardness of water can be removed by

A. Addition of alum (a coagulant)

B. Boiling

C. Filtration (through gravity sand filter)

D. Addition of lime

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Carbon tetrachloride (CCl₄) is the starting raw material for the manufacture of

A. Trichloroethylene

B. Perchloroethylene

C. Parathion

D. Methanol

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Chrome tanning and vegetable tanning are done for

A. Light & heavy leather respectively

B. Heavy & light leather respectively

C. Both light & heavy leather

D. Neither light nor heavy leather

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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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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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Phenol formaldehyde is produced by condensation polymerisation. It is also known as

A. Teflon

B. Bakelite

C. Polyester

D. Nylon-66

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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 a constituent of vinegar?

A. Around 10% alcohol

B. Around 1% acetic acid

C. Both (A) and (B)

D. Neither (A) nor (B)

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Alcohol percentage in molasses may be around

A. 10

B. 40

C. 70

D. 85

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Pick out the wrong statement.

A. Eosin requirement in tallow soap is about 40-50% which fastens the lather formation, softens the hard soaps and increases its cleansing action

B. Soap powder is prepared by mixing soap with hydrated sodium carbonate

C. Detergents differ from soaps in their action in hard water

D. Tarnish inhibitor (e.g., Benzotriazole) is added in soap to facilitate the removal of stains due to tea, blood etc

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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

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Metallic soap is __________ salt of fatty acids.

A. Sodium

B. Potassium

C. Both sodium & potassium

D. Aluminium or calcium

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Which of the following is used as a coagulant in water treatment?

A. Chloramine

B. Chlorine

C. Ferrous sulphate

D. Hydrogen peroxide

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Coke used for the production of calcium carbide should have

A. Low ash content

B. Low ignition temperature

C. High electrical resistivity

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

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The most commonly used substance to speed up the sedimentation of sewage is

A. Lime

B. Sulphuric acid

C. Chlorine

D. Sodium bisulphite

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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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Presence of sodium tripolyphosphate (an additive) in synthetic detergent

A. Facilitates its use even in hard water (by sequestering the water-hardening Ca & Mg ions)

B. Inhibits its corrosive effects

C. Does not allow redeposition of dirt on the cleaned surface

D. None of these

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Esterification reaction produces

A. Detergent

B. Vanaspati

C. Soap

D. Mercaptans

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Coloured glass is obtained by mixing of colored salts. Addition of __________ oxide is done to impart greenish blue color to the glass.

A. Chromium

B. Arsenic

C. Copper

D. Manganese

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Neoprene is the trade name of

A. Polyurethane

B. Phenol formaldehyde

C. Polychlorophrene

D. Styrene-butadiene rubber

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Accepted Answer

A. CaCO₃

Main constituent of limestone is

Correct Answer :

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Related Questions

Flux addition during smelting of ore is done to

__________ of quicklime produces slaked lime.

Which of the following is the most adverse factor challenging the choice of mercury electrolytic cell process for the production of caustic soda?

Glycerine can be obtained from

The most widely used coagulant for removing suspended impurities from water is

Alum is commercially produced from

Which of the following is a detergent?

Hydrolysis of sugar is called

Laboratory glass wares which reacts with hydrofluoric acid, are made of the __________ glass.

Chemical name of 'alum' is

Temporary hardness of water can be removed by

Carbon tetrachloride (CCl₄) is the starting raw material for the manufacture of

Chrome tanning and vegetable tanning are done for

Black liquor is converted into white liquor by

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

Phenol formaldehyde is produced by condensation polymerisation. It is also known as

Concentration of hydrogen peroxide is done by

Which of the following is a constituent of vinegar?

Alcohol percentage in molasses may be around

Pick out the wrong statement.

Exothermic neutralisation reaction between caustic soda and dodecylbenzene sulfonic acid produces sodium dodecylbenzene sulphate, which is a/an

Metallic soap is __________ salt of fatty acids.

Which of the following is used as a coagulant in water treatment?

Coke used for the production of calcium carbide should have

The most commonly used substance to speed up the sedimentation of sewage is

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

Presence of sodium tripolyphosphate (an additive) in synthetic detergent

Esterification reaction produces

Coloured glass is obtained by mixing of colored salts. Addition of __________ oxide is done to impart greenish blue color to the glass.

Neoprene is the trade name of

Also checkout

Main constituent of limestone is

Correct Answer :

Show all Chemical Process MCQ

Related Questions

Flux addition during smelting of ore is done to

__________ of quicklime produces slaked lime.

Which of the following is the most adverse factor challenging the choice of mercury electrolytic cell process for the production of caustic soda?

Glycerine can be obtained from

The most widely used coagulant for removing suspended impurities from water is

Alum is commercially produced from

Which of the following is a detergent?

Hydrolysis of sugar is called

Laboratory glass wares which reacts with hydrofluoric acid, are made of the __________ glass.

Chemical name of 'alum' is

Temporary hardness of water can be removed by

Carbon tetrachloride (CCl4) is the starting raw material for the manufacture of

Chrome tanning and vegetable tanning are done for

Black liquor is converted into white liquor by

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

Phenol formaldehyde is produced by condensation polymerisation. It is also known as

Concentration of hydrogen peroxide is done by

Which of the following is a constituent of vinegar?

Alcohol percentage in molasses may be around

Pick out the wrong statement.

Exothermic neutralisation reaction between caustic soda and dodecylbenzene sulfonic acid produces sodium dodecylbenzene sulphate, which is a/an

Metallic soap is __________ salt of fatty acids.

Which of the following is used as a coagulant in water treatment?

Coke used for the production of calcium carbide should have

The most commonly used substance to speed up the sedimentation of sewage is

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

Presence of sodium tripolyphosphate (an additive) in synthetic detergent

Esterification reaction produces

Coloured glass is obtained by mixing of colored salts. Addition of __________ oxide is done to impart greenish blue color to the glass.

Neoprene is the trade name of

Also checkout

Carbon tetrachloride (CCl₄) is the starting raw material for the manufacture of