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Current Affairs January 2024

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4

Fluorescent dyes are added in detergents to

A. Act as fabric brightener (by converting ultraviolet light to visible light) thereby improving the whiteness appearance of white fabrics

B. Attain distinctiveness from other brands

C. Act as tarnish inhibitor for metals like German silver

D. None of these

Correct Answer :

A. Act as fabric brightener (by converting ultraviolet light to visible light) thereby improving the whiteness appearance of white fabrics


Related Questions

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In the manufacture of viscose rayon, the raw material used industrially is

A. Eucalyptus wood

B. Bamboo

C. Bagasse

D. Fine teak wood

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4

Zeolite removes both temporary as well as permanent hardness of water by precipitating calcium and magnesium present in water as insoluble zeolites. Used zeolite is regenerated by flushing with the solution of

A. Calcium sulphate

B. Sodium chloride

C. Sodium sulphate

D. Magnesium chloride

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4

All enzymes are made of

A. Fats

B. Carbohydrates

C. Proteins

D. Amino acids

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__________ paper is used in the manufacture of newsprint paper.

A. Ground-wood

B. Board

C. Tissue

D. Wrapping

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Zeolite is a/an

A. Naturally occuring clay which is capable of exchanging cations

B. Abrasive material

C. Catalyst used in shift conversion

D. None of these

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Insulin is an __________ drug.

A. Anti-malarial

B. Anti-TB

C. Antibiotic

D. None of these

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Bleaching action of bleaching powder is due to its __________ properties.

A. Reducing

B. Oxidising

C. Disinfecting

D. None of these

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A 'unit process' is exemplified by the

A. Distillation

B. Hydrogenation of oils

C. Absorption

D. Humidification

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Which of the following, when pyrolysed, produces Perchloroethylene?

A. Ethylene dichloride

B. Chlorobenzene

C. Carbon tetrachloride

D. Chlorinated paraffin

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4

Fumigant insecticides

A. Kill insects, when they eat it

B. Emit poisonous vapour

C. Are absorbed throughout the plant

D. None of these

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The most popular and common detergent i.e., alkyl benzene sulfonate (ABS) is a/an __________ detergent.

A. Cationic

B. Anionic

C. Amphoteric

D. Semi polar

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4

Production of one ton of cement requires about __________ tons of limestone.

A. 0.6

B. 1.2

C. 2.2

D. 3.8

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Liquor poisoning generally occurs due to the presence of __________ in it.

A. Ethyl alcohol

B. Impurities

C. Methyl alcohol

D. Carbonic acid

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The gasification reaction represented by, C + H2O = CO + H2, is a/an __________ reaction.

A. Exothermic

B. Endothermic

C. Catalytic

D. Autocatalytic

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4

Penicillin is separated from fermented broth by

A. Extraction with amyl or butyl acetate

B. Ternary Azeotropic distillation

C. Evaporator in calandria

D. Extractive distillation

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4

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

A. Oxidising

B. Reducing

C. Complex forming

D. Photochemical

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4

Main constituents of natural rubber is

A. Polystyrene

B. Polyisoprene

C. Polybutadiene

D. Polychlorophrene

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Alcohol is produced by the

A. Oxidation of an aldehyde

B. Hydrolysis of an ether

C. Esterification of a fat

D. None of these

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Presence of sodium tripolyphosphate (an additive) in synthetic detergent

A. Facilitates its use even in hard water (by sequestering the water-hardening Ca & Mg ions)

B. Inhibits its corrosive effects

C. Does not allow redeposition of dirt on the cleaned surface

D. None of these

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4

__________ is a thermosetting plastic.

A. Polyvinyl chloride

B. Polythene

C. Bakelite

D. Teflon

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Percentage of glycerine present in the spent lye obtained during soap manufacture is about

A. 0.5

B. 5

C. 20

D. 35

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4

Pick out the wrong statement.

A. Low intensity explosives are also called propellants, whereas high intensity explosive are called detonators

B. Gun powder comprises of 75% salt petre, 15% charcoal and 10% sulphur

C. Lead azide is a popular military explosive

D. TNT is a hygroscopic explosive having very high melting point and is non-toxic to human being

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4

Extraction of __________ employs an electrolytic process.

A. Aluminium

B. Silver

C. Copper

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

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4

Electric bulbs are made of __________ glass.

A. Jena

B. Flint

C. Crookes

D. Pyrex

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4

Sucrose is a

A. Monosaccharide

B. Disaccharide

C. Polysaccharide

D. None of these

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__________ is a polysaccharide.

A. Maltose

B. Starch

C. Sucrose

D. Glucose

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Ethanol amine is produced using ammonia and

A. Ethyl benzene

B. Ethylene oxide

C. Ethanol

D. Ethane

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Bakelite is

A. Same as Polytetrafluoroethylene (PTFE)

B. An inorganic polymer

C. Same as thermosetting phenol-formaldehyde

D. Not a polymer

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4

A mineral is termed as 'ore', if

A. A metal can be economically extracted from it

B. It contains ≥ 40% metal

C. The metal present in it is costly

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

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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)