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In primitive days, __________ was being manufactured by Leblanc Process.

A. Alum

B. Washing soda

C. Soda ash

D. Calcium carbide

Correct Answer :

C. Soda ash


Related Questions

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Calcination of gypsum produces

A. Plaster of Paris

B. Salt cake

C. Nitre cake

D. Lime

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Permanent hardness of water can be removed by

A. Boiling

B. Adding Ca(OH)2

C. Boiling it with Na2CO3

D. None of these

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4

Chemical formula of oleum is

A. H2SO3

B. H2SO4

C. H2S2O7

D. H2SO7

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Transportation of 35% oleum during winter suffers from the problem of freezing, which can be overcome by the addition of small quantity of

A. Nitric acid

B. Hydrochloric acid

C. Methyl alcohol

D. Formic acid

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Raw material used in alcohol distilleries in India is

A. Molasses

B. Benzol

C. Methylated spirit

D. None of these

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Which of the following is an unsaturated fatty acid?

A. Lauric acid

B. Palmitic acid

C. Stearic acid

D. Oleic acid

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Which of the following is an explosive?

A. Nitro-glycerine

B. Trinitrotoluene (TNT)

C. Cellulose nitrate

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

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__________ is produced by the dehydrogenation of ethyl benzene.

A. Styrene

B. Ethyl alcohol

C. Cumene

D. Phenol

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Phosphoric acid is prepared from

A. Cryolite

B. Chalcopyrite

C. Rock phosphate

D. None of these

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The chamber process is

A. Preferred over contact process for producing 98 to 100% H2SO4 and various oleums

B. Non-catalytic and operates only on pyrites

C. A batch process for directly producing high strength (98 to 100%) H2SO4

D. None of these

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Which of the following sugars is the sweetest?

A. Glucose

B. Fructose

C. Sucrose

D. Lactose

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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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4

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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4

High magnesia lime is added to hot sugar cane juice (during the manufacture of sugar) to

A. Flocculate the impurities

B. Facilitate fast filtration

C. Both (A) and (B)

D. Neither (A) nor (B)

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Dichloro diphenyl __________ is the full form of DDT (an insecticide).

A. Tetrachloroethane

B. Trichloroethane

C. Tetrachloromethane

D. Trichloromethane

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Inversion of sucrose produces

A. Fructose

B. Glucose

C. Both (A) & (B)

D. Neither (A) nor (B)

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Esterification reaction

A. Produces soap

B. Is reversible

C. Is a reaction between an alcohol and an organic acid

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

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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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The most stable allotropic form of phosphorous is the __________ phosphorous.

A. White

B. Black

C. Yellow

D. Red

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Raw materials required for the manufacture of __________ is acetylene and hydrochloric acid.

A. Phthalic anhydride

B. Vinyl chloride

C. Maleic anhydride

D. Dacron

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__________ is a polysaccharide.

A. Maltose

B. Starch

C. Sucrose

D. Glucose

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All enzymes are made of

A. Fats

B. Carbohydrates

C. Proteins

D. Amino acids

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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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Which is the most efficient absorbent for SO3 out of the following?

A. 20% oleum

B. 65% oleum

C. 78% H2SO4

D. 98% H2SO4

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

A. Chlorine

B. Ferric sulphate

C. Calcium sulphate

D. Activated carbon

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For the hydrogenation of oils, __________ (i) __________ is commonly used as catalyst and __________ (ii) __________ is a catalyst poison.

A. (i) platinum (ii) sulphur

B. (i) palladium (ii) oxygen

C. (i) nickel (ii) sulphur

D. (i) nickel (ii) oxygen

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Catalyst used in the hydrogenation of oil is

A. Nickel

B. Platinum

C. Iron

D. Alumina

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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 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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Hard water

A. Does not affect the lather formation by soap

B. Is not unfit for drinking purpose

C. Pollutes the water stream

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