Plasticisers are added to synthetic plastics to

Question

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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Hydrochloric acid is also known as

A. Oil of vitriol

B. Muriatic acid

C. Strong organic acid

D. Green acid

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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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Most easily and cheaply available fibrous raw material for paper manufacture available in India is bamboo. The yield of pulp produced from fibrous raw material by mechanical process is about __________ percent.

A. 75

B. < 10

C. > 30

D. 50

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Function of sodium thiosulphate (hypo) in development of photographic film/plate is to

A. Brighten the faint images

B. Remove metallic silver

C. Convert silver chloride to silver

D. Remove unexposed silver halide

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Sulphuric acid is mainly used in the __________ industry.

A. Fertiliser

B. Steel

C. Paper

D. Paint

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Roasting of metallurgical ores is done mainly to

A. Dehydrate it

B. Sinter the ore

C. Remove CO₂ & H₂O

D. Remove arsenic & sulphur

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Use of chlorine in the treatment of sewage

A. Helps in grease separation

B. Increases the biological oxygen demand (BOD)

C. Causes bulking of activated sludge

D. Aids in flocculation

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Molecular weight of plastics ranges from

A. 5000 to 10000

B. 20000 to 250000

C. 500 to 5000

D. 106 to 109

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CaCl(OCl) is the chemical formula of

A. Hypo

B. Bleaching powder

C. Plaster of Paris

D. Aqua regia

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Coke oven gas consists mainly of

A. H₂, & CH₄

B. CO, & CO₂

C. H₂, & CO

D. CH₄, & CO

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Calgon used in water treatment is chemically

A. Sodium phosphate

B. Sodium hexametaphosphate

C. Calcium phosphate

D. Tricresyl phosphate

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Exothermic condensation reaction of monochlorobenzene with chloral in presence of 20% oleum as catalyst produces DDT. The reaction temperature is maintained at __________ °C.

A. 15-30

B. 90-100

C. 250-300

D. < 0

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Synthesis gas is a mixture of

A. CO and H₂

B. N₂ and H₂

C. H₂, CH₄ and CO

D. CO₂ and H₂

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Dehydrogenation of ethyl benzene produces

A. Styrene

B. Naphthalene

C. Phenol

D. Benzoic acid

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Reaction of an alcohol with organic acid is called the __________ reaction.

A. Saponification

B. Esterification

C. Neutralisation

D. Acidification

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Which one of the following is not an elastomer?

A. Polyisoprene

B. Neoprene

C. Nitrile-butadiene

D. None of these

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Low temperature carbonisation of coal takes place at __________ °C.

A. 300

B. 1100

C. 700

D. 900

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Percentage of alcohol in beer may be around __________ percent.

A. 2-8

B. 18-23

C. 27-32

D. 1-4

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Percentage of uranium in Carnotite ore found in Jadugoda (Jharkhand) is about

A. 0.1 to 0.5

B. 1 to 5

C. 5 to 10

D. 15 to 25

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__________ process is used for the manufacture of sodium carbonate by ammonia soda process.

A. Ostwald's

B. Bosch

C. Solvay

D. Haber's

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Rotary kiln is not involved in the production of

A. Cement

B. Lime from limestone

C. Slaked lime from quick lime

D. None of these

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Cooking liquor in case of sulphite process is

A. Sodium sulphite and sodium bisulphite

B. Magnesium sulphite and free SO2 in acid medium

C. Magnesium sulphate and magnesium bicarbonate

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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Tall oil obtained as a by-product from the black liquor recovery is

A. A black, sticky & viscous liquid

B. Used in the manufacture of greases, emulsions & soaps

C. Composed mainly of rosin & fatty acids

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

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The main use of activated carbon in water treatment is to control

A. Bacterial growth

B. Taste and odour

C. Turbidity

D. None of these

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Which one of the following is not likely to be a constituent of vegetable oils?

A. Citric acid

B. Oleic acid

C. Stearic acid

D. Glycerol

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Presence of carbonaceous matter in the sewage

A. Causes reduction in its dissolved oxygen content thereby endangering the life of aquatic creatures

B. Reduces sulphate ions to sulphides causing obnoxious smell

C. Increases the quantity of chlorine used for its purification

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

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Pig iron is produced by blast furnaces in India using mostly the iron ore named

A. Hematite

B. Magnetite

C. Siderite

D. Chalcopyrite

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Nitrogen is an essential component of

A. Mineral salts

B. Carbohydrates

C. Fats

D. Proteins

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In contact process, SO₃ is absorbed in 97% H₂SO₄ and not in water, because

A. SO₃ gas is sparingly soluble in water

B. Water forms an acid mist, which is difficult to absorb

C. The purity of acid is affected

D. Scale formation in the absorber is to be avoided

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Accepted Answer

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

Plasticisers are added to synthetic plastics to

Correct Answer :

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Related Questions

Hydrochloric acid is also known as

Flux addition during smelting of ore is done to

Most easily and cheaply available fibrous raw material for paper manufacture available in India is bamboo. The yield of pulp produced from fibrous raw material by mechanical process is about __________ percent.

Function of sodium thiosulphate (hypo) in development of photographic film/plate is to

Sulphuric acid is mainly used in the __________ industry.

Roasting of metallurgical ores is done mainly to

Use of chlorine in the treatment of sewage

Molecular weight of plastics ranges from

CaCl(OCl) is the chemical formula of

Coke oven gas consists mainly of

Calgon used in water treatment is chemically

Exothermic condensation reaction of monochlorobenzene with chloral in presence of 20% oleum as catalyst produces DDT. The reaction temperature is maintained at __________ °C.

Synthesis gas is a mixture of

Dehydrogenation of ethyl benzene produces

Reaction of an alcohol with organic acid is called the __________ reaction.

Which one of the following is not an elastomer?

Low temperature carbonisation of coal takes place at __________ °C.

Percentage of alcohol in beer may be around __________ percent.

Percentage of uranium in Carnotite ore found in Jadugoda (Jharkhand) is about

__________ process is used for the manufacture of sodium carbonate by ammonia soda process.

Rotary kiln is not involved in the production of

Cooking liquor in case of sulphite process is

In the Solvay process, the product from the calciner is

Tall oil obtained as a by-product from the black liquor recovery is

The main use of activated carbon in water treatment is to control

Which one of the following is not likely to be a constituent of vegetable oils?

Presence of carbonaceous matter in the sewage

Pig iron is produced by blast furnaces in India using mostly the iron ore named

Nitrogen is an essential component of

In contact process, SO₃ is absorbed in 97% H₂SO₄ and not in water, because

Also checkout

Plasticisers are added to synthetic plastics to

Correct Answer :

Show all Chemical Process MCQ

Related Questions

Hydrochloric acid is also known as

Flux addition during smelting of ore is done to

Most easily and cheaply available fibrous raw material for paper manufacture available in India is bamboo. The yield of pulp produced from fibrous raw material by mechanical process is about __________ percent.

Function of sodium thiosulphate (hypo) in development of photographic film/plate is to

Sulphuric acid is mainly used in the __________ industry.

Roasting of metallurgical ores is done mainly to

Use of chlorine in the treatment of sewage

Molecular weight of plastics ranges from

CaCl(OCl) is the chemical formula of

Coke oven gas consists mainly of

Calgon used in water treatment is chemically

Exothermic condensation reaction of monochlorobenzene with chloral in presence of 20% oleum as catalyst produces DDT. The reaction temperature is maintained at __________ °C.

Synthesis gas is a mixture of

Dehydrogenation of ethyl benzene produces

Reaction of an alcohol with organic acid is called the __________ reaction.

Which one of the following is not an elastomer?

Low temperature carbonisation of coal takes place at __________ °C.

Percentage of alcohol in beer may be around __________ percent.

Percentage of uranium in Carnotite ore found in Jadugoda (Jharkhand) is about

__________ process is used for the manufacture of sodium carbonate by ammonia soda process.

Rotary kiln is not involved in the production of

Cooking liquor in case of sulphite process is

In the Solvay process, the product from the calciner is

Tall oil obtained as a by-product from the black liquor recovery is

The main use of activated carbon in water treatment is to control

Which one of the following is not likely to be a constituent of vegetable oils?

Presence of carbonaceous matter in the sewage

Pig iron is produced by blast furnaces in India using mostly the iron ore named

Nitrogen is an essential component of

In contact process, SO3 is absorbed in 97% H2SO4 and not in water, because

Also checkout

In contact process, SO₃ is absorbed in 97% H₂SO₄ and not in water, because