Temporary hardness of water can be removed by

Question

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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Vegetable oils and fats basically differ in their

A. Density ranges

B. Physical state

C. Chemical composition

D. Chemical properties

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__________ process is used for producing soda ash.

A. Chamber

B. Chance

C. Tromp

D. Solvay

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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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Concentration of sulphide ores is done usually by

A. Roasting

B. Smelting

C. Froth floatation

D. Electromagnetic separation

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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

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Salt is the basic raw material for the manufacture of

A. Cement

B. Glass

C. Potteries

D. Caustic soda

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The compressive strength of cement should not be less than about 110Kg/cm² after three days & not less than 170Kg/cm² after seven days. The fineness of an ordinary cement as determined by turbidimetric method should be about __________ cm²/gm.

A. 800

B. 1600

C. 4000

D. 8500

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Margarine is a/an

A. Fat

B. Explosive

C. Plasticiser

D. Rocket propellant

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Which of the following is not responsible for causing permanent hardness of water?

A. Ca(HCO₃)₂

B. CaCl₂

C. MgCl₂

D. None of these

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

A. 5

B. 30

C. 130

D. 300

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Portland cement consists mainly of

A. CaO & SiO₂

B. SiO₂ & Al₂O₃

C. CaO & Al₂O₃

D. CaO & Fe₂O₃

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Plasticisers are added to synthetic plastics to

A. Impart flexibility

B. Improve workability during fabrication

C. Develop new improved properties not present in the original resins

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

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The catalyst used in the manufacture of DDT (from chloral and chlorobenzene) is

A. Dilute H₂SO₄

B. Oleum

C. Ultraviolet light

D. None of these

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__________ is used as a catalyst in fat splitting.

A. ZnO

B. Ni

C. V₂O₅

D. FeO

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Which form of sulphur is the most stable at room temperature?

A. Plastic

B. Monoclinic

C. Rhombic

D. Flowers of sulphur

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The major constituents of glass are

A. Lime, clay and soda ash

B. Sand, lime and soda ash

C. Silica, alumina and clay

D. Silica, alumina and soda ash

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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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Anion exchanger is regenerated usually with

A. NaOH

B. H2SO4

C. Hydrazine

D. Alum solution

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Zeigler process

A. Produces high density polyethylene

B. Produces low density polyethylene

C. Uses no catalyst

D. Employs very high pressure

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Dechlorination of treated water is necessary to

A. Remove residual turbidity

B. Reduce the bacterial load on filter

C. Control taste and odour

D. Remove chlorinous taste

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Solvent extracted oil

A. Has low free fatty acid content

B. Is odourless

C. Has more of unsaturates

D. None of these

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Use of water having dissolved oxygen in boilers promotes

A. Corrosion

B. Sequestration

C. Scale formation

D. None of these

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Neoprene is chemically known as

A. Polybutadiene

B. Styrene butadiene rubber (SBR)

C. Polyurethane

D. Polychlorophrene

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A mineral is termed as 'ore', if

A. A metal can be economically extracted from it

B. It contains ≥ 40% metal

C. The metal present in it is costly

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

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Acetone is produced by catalytic dehydrogenation of

A. Phenol

B. Naphthalene

C. Isopropanol

D. Ethyl benzene

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Rancidity of the fatty oil can be reduced by its

A. Decoloration

B. Hydrogenation

C. Oxidation

D. Purification

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Poly Tetrafluoroethylene (P.T.F.E.) is known as

A. Bakelite

B. Teflon

C. Celluloid

D. Dacron

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Sulphuric acid solution having a specific gravity of 1.20 at room temperature is used mainly for the

A. Fertiliser manufacture

B. Car battery solution

C. Synthesis of oleum

D. Water treatment

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Vinyl chloride (CH2 = CH.Cl) is produced by the thermal pyrolysis of ethylene dichloride at a pressure & temperature of

A. 4 kgf/cm² & 500°C

B. 10 kgf/cm² & 1000°C

C. 40 kg/cm² & 200°C

D. 100 kgf/cm² & 500°C

Discuss this answer

Accepted Answer

B. Boiling

Temporary hardness of water can be removed by

Correct Answer :

Show all Chemical Process MCQ

Related Questions

Vegetable oils and fats basically differ in their

__________ process is used for producing soda ash.

Neon gas is

Concentration of sulphide ores is done usually by

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

Salt is the basic raw material for the manufacture of

The compressive strength of cement should not be less than about 110Kg/cm² after three days & not less than 170Kg/cm² after seven days. The fineness of an ordinary cement as determined by turbidimetric method should be about __________ cm²/gm.

Margarine is a/an

Which of the following is not responsible for causing permanent hardness of water?

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

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

Portland cement consists mainly of

Plasticisers are added to synthetic plastics to

The catalyst used in the manufacture of DDT (from chloral and chlorobenzene) is

__________ is used as a catalyst in fat splitting.

Which form of sulphur is the most stable at room temperature?

The major constituents of glass are

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

Anion exchanger is regenerated usually with

Zeigler process

Dechlorination of treated water is necessary to

Solvent extracted oil

Use of water having dissolved oxygen in boilers promotes

Neoprene is chemically known as

A mineral is termed as 'ore', if

Acetone is produced by catalytic dehydrogenation of

Rancidity of the fatty oil can be reduced by its

Poly Tetrafluoroethylene (P.T.F.E.) is known as

Sulphuric acid solution having a specific gravity of 1.20 at room temperature is used mainly for the

Vinyl chloride (CH2 = CH.Cl) is produced by the thermal pyrolysis of ethylene dichloride at a pressure & temperature of

Also checkout

Temporary hardness of water can be removed by

Correct Answer :

Show all Chemical Process MCQ

Related Questions

Vegetable oils and fats basically differ in their

__________ process is used for producing soda ash.

Neon gas is

Concentration of sulphide ores is done usually by

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

Salt is the basic raw material for the manufacture of

The compressive strength of cement should not be less than about 110Kg/cm2 after three days & not less than 170Kg/cm2 after seven days. The fineness of an ordinary cement as determined by turbidimetric method should be about __________ cm2/gm.

Margarine is a/an

Which of the following is not responsible for causing permanent hardness of water?

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

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

Portland cement consists mainly of

Plasticisers are added to synthetic plastics to

The catalyst used in the manufacture of DDT (from chloral and chlorobenzene) is

__________ is used as a catalyst in fat splitting.

Which form of sulphur is the most stable at room temperature?

The major constituents of glass are

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

Anion exchanger is regenerated usually with

Zeigler process

Dechlorination of treated water is necessary to

Solvent extracted oil

Use of water having dissolved oxygen in boilers promotes

Neoprene is chemically known as

A mineral is termed as 'ore', if

Acetone is produced by catalytic dehydrogenation of

Rancidity of the fatty oil can be reduced by its

Poly Tetrafluoroethylene (P.T.F.E.) is known as

Sulphuric acid solution having a specific gravity of 1.20 at room temperature is used mainly for the

Vinyl chloride (CH2 = CH.Cl) is produced by the thermal pyrolysis of ethylene dichloride at a pressure & temperature of

Also checkout

The compressive strength of cement should not be less than about 110Kg/cm² after three days & not less than 170Kg/cm² after seven days. The fineness of an ordinary cement as determined by turbidimetric method should be about __________ cm²/gm.