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Sodium chloride content in sea water is about __________ gms/litre.

A. 2

B. 10

C. 25

D. 50

Correct Answer :

C. 25


Related Questions

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Haemoglobin is a/an

A. Amino acid

B. Biological catalyst

C. Protein

D. Enzyme

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Kopper-Totzek coal gasifier

A. Can give ammonia synthesis gas (H2 + N2)

B. Is a moving bed reactor

C. Cannot use coking coal

D. Operate at very high pressure

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Pick out the wrong statement.

A. High early strength cement are made from materials having high silica to lime ratio

B. The function of gypsum in cement is to enhance its initial setting rate

C. Acid resistant cements are known as silicate cement

D. Major component of greyish Portland cement is tricalcium silicate

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Permanent hardness of water can be removed by

A. Simply boiling

B. Adding alum

C. Passing it through cation & anion exchangers

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

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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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Neoprene is chemically known as

A. Polybutadiene

B. Styrene butadiene rubber (SBR)

C. Polyurethane

D. Polychlorophrene

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SO2 is bubbled through hot sugar cane juice to

A. Act as an acidifying agent

B. Increase its concentration

C. Increase the amount of molasses

D. Increase the crystal size

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Detergent is produced by the sulphonation of dodecyl benzene, which is an __________ reaction.

A. Endothermic

B. Exothermic

C. Irreversible

D. Both (B) and (C)

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Salt cake is chemically represented by

A. Na2SO4

B. CaSO4. ½H2O

C. MgSO4

D. BaSO4

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Hydrogenation of vegetable oils is a/an __________ reaction.

A. Endothermic

B. Autocatalytic

C. Exothermic

D. Homogenous

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Hollander beater used during paper pulp manufacture does not facilitate the __________ of fibre.

A. Cutting

B. Fibrillation

C. Hydration

D. Strengthening

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Viscose rayon

A. Cannot be made from sulphite pulp

B. Utilises H2SO4, NaOH and CS2 during its manufacture

C. Cannot yield textile grade fibre

D. None of these

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Lurgi coal gasifier is a pressurised __________ bed reactor.

A. Moving

B. Fixed

C. Fluidised

D. Entrained

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Epoxy resin

A. Is a good adhesive

B. Is an elastomer

C. Cannot be used for surface coatings

D. Is a polyester

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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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Styrene is produced from ethyl benzene by the process of

A. Dehydrogenation

B. Oxidation

C. Alkylation

D. Dehydration

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Phosphate rock is a raw material for the manufacture of

A. Phosphoric acid

B. Phosphorous

C. Superphosphates

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

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Which of the following sugars is the sweetest?

A. Glucose

B. Fructose

C. Sucrose

D. Lactose

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__________ glass has the lowest co-efficient of thermal expansion and hence is more heat resistant.

A. Pyrex

B. Soda lime

C. Lead

D. High silica

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In Kraft process of paper manufacture, white cooking liquor consists of caustic soda

A. Sodium sulphide & sodium carbonate

B. Sodium sulphite & sodium carbonate

C. Sodium sulphite & sodium sulphide

D. None of these

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Molecular weights of polymers are in the range of

A. 102 - 102

B. 105 - 109

C. 102 - 107

D. 109 - 1011

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Main constituents of Portland cement are calcium aluminate and

A. Gypsum

B. Silicates

C. Sodium silicate

D. Carbonates

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Ore concentration by froth floatation utilises the __________ of ore particles.

A. Density difference

B. Wetting characteristics

C. Terminal velocities

D. None of these

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Hydrogenation of oil does not

A. Remove double bonds

B. Raise its melting point

C. Improve its resistance to oxidation

D. None of these

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Ultimate analysis of coal determines its __________ content.

A. Carbon, hydrogen, nitrogen & sulphur

B. Carbon, ash, sulphur & nitrogen

C. Carbon, sulphur, volatile matter & ash

D. Carbon, volatile matter, ash & moisture

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Mercury cells for caustic soda manufacture, compared to diaphragm cells

A. Require lower initial investment

B. Require more power

C. Produce lower concentration NaOH

D. None of these

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Pick out the correct statement.

A. A fat is converted into oil by its hydrogenation

B. There is no difference between a fat and an oil so far as its physical properties are concerned

C. All vegetable oils except coconut oil, contains fatty acids having more than sixteen carbon atoms

D. Vegetable oils are classified as drying, non-drying and semi drying oils depending upon their fatty acids content

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The basic constituent of vegetable oils is

A. Triglyceride

B. Fatty acids

C. Fatty alcohol

D. Mono esters

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Thermal pyrolysis of ethylene dichloride produces

A. Trichloroethylene

B. Vinyl chloride

C. Ethanol amine

D. Ethylene oxide

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P.T.F.E. (Poly tetra fluoro ethylene) is commercially known as

A. Bakelite

B. Neoprene

C. Teflon

D. Nylon-66