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Current Affairs January 2024

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__________ is a thermosetting plastic.

A. Polyvinyl chloride

B. Polythene

C. Bakelite

D. Teflon

Correct Answer :

C. Bakelite


Related Questions

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The terminology 'BTX' used in coal tar distillation industry refers to

A. Benzol-toluol-xylol

B. Benzol-toluene-xylene

C. Benzene-toluol-xylol

D. Benzene-toluene-xylene

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4

Pick out the wrong statement.

A. Wine, rum & Vodka are prepared by the formulation of fruit juice, sugar beet & rye respectively

B. Protein catalysts are called enzymes

C. The rate of chemical reaction is independent of the concentration of reactants at high concentration of enzymes

D. Total sugar content in molasses is about 10%

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4

Main constituent of dolomite is

A. CaCO3

B. MgCO3

C. K2CO3

D. Na2CO3

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Superior quality laboratory apparatus is made of the __________ glass having low thermal coefficient of expansion & high chemical resistance.

A. Flint

B. Soda

C. Pyrex

D. Potash

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4

Resistance to fusion of the refractory under a steady rising temperature condition is called

A. Spalling

B. Refractoriness

C. Both (A) & (B)

D. Neither (A) nor (B)

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4

The main use of activated carbon in water treatment is to control

A. Bacterial growth

B. Taste and odour

C. Turbidity

D. None of these

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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

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4

Bleaching powder (chemically known as calcium chloro hypochlorite) is commercially produced by the action of chlorine on

A. Slaked lime

B. Soda lime

C. Calcium perchlorate

D. None of these

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4

Chlorine gas is produced by the electrolysis of brine (NaCl solution with solid NaCl make up) in mercury electrolytic cell. Which of the following is the anodic reaction?

A. Oxidation of Na+ ions

B. Oxidation of Cl- ions

C. Reduction of Na+ ions

D. Reduction of Cl- ions

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4

Bordeaux mixture is a/an

A. Fertiliser

B. Inorganic fungicide

C. Insecticide

D. Explosive

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4

Trinitro-toluene (TNT) is

A. Used in glycerine manufacture

B. An explosive

C. Used in dye manufacture

D. None of these

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4

Hydrocyanic acid (HCN) is used as an insecticide for

A. Controlling timber degradation by ants

B. Controlling poultry lice

C. Potato beetle

D. Citrus fruits

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4

Glycerine is not used in the

A. Manufacture of explosive

B. Conditioning and humidification of tobacco

C. Manufacture of pharmaceuticals

D. None of these

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4

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

Which of the following is not an antibiotic?

A. Penicillin

B. Streptomycin

C. Tetracycline

D. Quinine

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4

Nickel is not used as a catalyst in the __________ reaction.

A. Shift conversion

B. Oil hydrogenation

C. Steaming reforming of naphtha

D. Ammonia cracking/dissociation

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4

Phenolic antiseptics are added in the __________ soap.

A. Shaving

B. Medicated

C. Metallic

D. Transparent

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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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4

Sucrose is a

A. Monosaccharide

B. Disaccharide

C. Polysaccharide

D. None of these

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4

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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4

The drug used in contraceptives is

A. Sulfadiazine

B. Mestranol

C. Methyl salicylate

D. Penicillin

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4

Very fine suspended and colloidal impurities are removed from water by a process called

A. Sedimentation

B. Coagulation

C. Disinfection

D. Softening

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4

Hydrogenation of oil takes place in a/an __________ reactor.

A. Autothermal

B. Trickle bed

C. Plug flow

D. None of these

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4

Phosphoric acid is prepared from

A. Cryolite

B. Chalcopyrite

C. Rock phosphate

D. None of these

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4

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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4

Fats as compared to oils have

A. More unsaturated glycerides of fatty acids

B. Less unsaturated glycerides of fatty acids

C. Much higher reactivity to oxygen

D. Lower melting point

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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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4

Separation of fresh water from sea water can be done by the __________ operation.

A. Osmosis

B. Reverse osmosis

C. Absorption

D. Adsorption

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4

__________ are used as corrosion inhibitor for iron & steel in aqueous solutions.

A. Phosphates

B. Chromates

C. Sulphates

D. Bi-carbonates

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4

Which of the following impurities in feed water for high pressure boiler is the most detrimental?

A. Silica

B. Dissolved oxygen

C. Suspended salt

D. Dissolved salt