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__________ Nature of hypo (sodium thiosulphate) makes it useful in photography.

A. Oxidising

B. Reducing

C. Complex forming

D. Photochemical

Correct Answer :

C. Complex forming


Related Questions

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Fish contains about __________ percent oil.

A. 5

B. 10

C. 20

D. 35

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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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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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Hydrazine (N2H4) is used mainly as a/an

A. Explosive

B. Rocket fuel

C. Detergents additive

D. None of these

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Chrome tanning and vegetable tanning are done for

A. Light & heavy leather respectively

B. Heavy & light leather respectively

C. Both light & heavy leather

D. Neither light nor heavy leather

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Pick out the true statement pertaining to water treatment.

A. Slow sand filters can remove colour completely

B. Activated carbon can be used for taste & odour control without subsequent filtration

C. Application of activated carbon reduces the temporary hardness of water

D. Normally, the turbidity is removed by adding a coagulant prior to sedimentation

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

A. Chloramine

B. Chlorine

C. Ferrous sulphate

D. Hydrogen peroxide

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Carbon tetrachloride (CCl4) is the starting raw material for the manufacture of

A. Trichloroethylene

B. Perchloroethylene

C. Parathion

D. Methanol

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Na2CO3.10H2O is called

A. Washing soda

B. Soda ash

C. Slaked lime

D. Quicklime

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The main product of high temperature carbonisation of coal is

A. Coke

B. Ammonia

C. Tar

D. Phenol

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Massecuite is a terminology used in the __________ industry.

A. Paint

B. Oil hydrogenation

C. Soap

D. Sugar

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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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Laboratory glass wares which reacts with hydrofluoric acid, are made of the __________ glass.

A. Lead

B. Borosilicate

C. Soda lime

D. Alkali silicate

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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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Commonly used glass is known as the __________ glass.

A. Flint

B. Hard

C. Pyrex

D. Soda

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Boiling of water containing temporary hardness produces

A. CO2

B. CaSO4

C. CaHCO3

D. None of these

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Main use of hydrazine is

A. As a rocket fuel

B. In water treatment

C. As a disinfectant

D. As fire retardant

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Enamels

A. Give good glossy finish

B. Are same as varnish

C. Are prepared from non-drying oil

D. Do not contain pigment

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Carbon disulphide is mainly used in the production of

A. Viscose rayon

B. Corundum

C. Plasticiser for unsaturated polyester

D. Paints

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Nylon-6 is a

A. Polyamide

B. Thermosetting resin

C. Polyester

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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Air used in aerobic fermentation must be sterilized, otherwise the

A. Recovery of product will be difficult

B. Contamination of pure culture would result

C. Uniformity of product cannot be achieved

D. None of these

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Paper grade bamboo contains about __________ percent cellulose.

A. 5

B. 20

C. 40

D. 60

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Alcohol content in freshly prepared natural and fortified wine may be respectively around __________ percent.

A. 7-14 and 14-30

B. 7-14 and 40-50

C. 14 - 30 and 40-50

D. 10 - 20 and 40 - 50

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Main constituent of dolomite is

A. CaCO3

B. MgCO3

C. K2CO3

D. Na2CO3

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Massecuite is

A. Used for paper making

B. Used as a cattle feed

C. Highly acidic in nature

D. None of these

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Baking soda is chemically represented by

A. Na2CO3

B. NaHCO3

C. Na2CO3.H2O

D. Na2CO3.10H2O

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Pick out the wrong statement.

A. Fibrillation of fibre during paper manufacture is done to develop the strength in paper

B. Alkali consumption in digestion/cooking of bamboo is measured in terms of permanganate number

C. Bagasse fibre contains both lignin & cellulose

D. Presence of sodium sulphate in pulp makes the pulp bleachability poor

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In nylon-66, the first and second numbers (i.e., 6) respectively designate the number of carbon atoms present in the

A. Diamine and the ring

B. Dibasic acid and the ring

C. Diamine and the dibasic acid

D. None of these

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Ordinary glass is not a/an

A. Amorphous isotropic material

B. Supercooled liquid

C. Material with sharp definite melting point

D. Electrical insulator