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4

The product obtained on mixing calcium oxide with water is called

A. Quicklime

B. Slaked lime

C. Milk of lime

D. None of these

Correct Answer :

B. Slaked lime


Related Questions

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The yield of tar from high temperature carbonisation of dry coal is about __________ percent.

A. 3

B. 12

C. 22

D. 0.3

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Reaction of ethylene glycol and dimethyl terephthalate (DMT) produces

A. Nylon-6

B. Dacron

C. Polyester

D. PVC

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4

Gun powder, which is an explosive comprises of charcoal, sulphur and

A. Glycerine

B. Salt petre

C. Nitro glycerine

D. Dynamite

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4

During the manufacture of sulphuric acid, the temperature of molten sulphur is not increased beyond 160°C, as

A. It is very corrosive at elevated temperature

B. Its viscosity is not reduced on further heating (hence pressure drop on pumping it, cannot be further reduced)

C. It decomposes on further increasing the temperature

D. None of these

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Styrene is produced from ethyl benzene by the process of

A. Dehydrogenation

B. Oxidation

C. Alkylation

D. Dehydration

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99.5% purity oxygen is used in

A. Cutting and welding by oxy-acetylene flame

B. Hospitals for medicinal purposes

C. Gas masks and artificial breathing apparatus

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

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4

Sea water contains about __________ ppm of bromine.

A. 5

B. 70

C. 500

D. 1700

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4

Riboflavin is a/an

A. Vitamin

B. Analgesic drug

C. Anaesthetics

D. Anti-malarial drug

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4

Insulin is an __________ drug.

A. Anti-malarial

B. Anti-TB

C. Antibiotic

D. None of these

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4

Which of the following is not required in the manufacture of soda ash by Solvay process?

A. Ammonia

B. Limestone

C. Nitric acid

D. None of these

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Which of the following is the purest form of water out of the following?

A. Underground water

B. Rain water

C. Well water

D. Lake water

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4

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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4

A unit operation is exemplified by the process of

A. Reduction

B. Desorption

C. Nitration

D. Combustion

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Nitrogen is an essential component of

A. Mineral salts

B. Carbohydrates

C. Fats

D. Proteins

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4

Main product in calcium carbide-water reaction is

A. Ca(OH)2

B. C2H2

C. CO2

D. CaCO3

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4

Le-Blanc process is a primitive process for the manufacture of

A. Caustic soda

B. Soda ash

C. Bromine from sea water

D. Hydrochloric acid

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Acrylonitrile is mainly used in the __________ industry.

A. Polymer

B. Printing

C. Dyeing

D. Photographic

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4

Yellow phosphorus is transported under

A. Air

B. Water

C. Nitrogen

D. Helium

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4

Refractory bricks burnt at very high temperature have got

A. Greater resistance to corrosion by slags

B. Less resistance to corrosion by slags

C. High spalling tendency

D. None of these

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4

Sudden temperature fluctuation does not affect pyrex glass, because of its

A. Low co-efficient of expansion

B. High co-efficient of expansion

C. High melting point

D. Both (B) and (C)

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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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4

Production of alcohol by fermentation of molasses is a/an __________ process.

A. Anaerobic

B. Aerobic

C. Endothermic

D. Both (B) and (C)

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4

Oils and fats are converted to soap in a process called

A. Hydrogenation

B. Esterification

C. Saponification

D. None of these

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Which of the following is an additional step in the manufacture of paper from bagasse as compared to that from bamboo?

A. Depithing

B. Digestion

C. Bleaching

D. None of these

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4

Litharge is

A. Lead oxide

B. Zinc oxide

C. Zinc sulphide

D. Cellulosic photographic material

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Mercury electrolytic cells are preferred over diaphragm electrolytic cell (for production of caustic soda), as it

A. Has larger production capacity per unit cell

B. Consumes less power per ton of Cl2 produced

C. Produces high purity (70%) caustic soda directly

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

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4

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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4

Dacron (or Terylene) fibres as compared to nylon fibres have

A. Better heat & acid resistant properties

B. Poorer resistance to alkalis

C. Poorer dyeability

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

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4

Sea weeds are an important source of

A. Fluorine

B. Chlorine

C. Bromine

D. Iodine

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Paper grade bamboo contains about __________ percent cellulose.

A. 5

B. 20

C. 40

D. 60