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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 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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Vinyl chloride (CH2 = CH.Cl) is produced by the thermal pyrolysis of ethylene dichloride at a pressure & temperature of

A. 4 kgf/cm2 & 500°C

B. 10 kgf/cm2 & 1000°C

C. 40 kg/cm2 & 200°C

D. 100 kgf/cm2 & 500°C

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A substance produced by a living organism and capable of anti-microbial activity is called a/an

A. Antibiotic

B. Antiseptic

C. Disinfectant

D. None of these

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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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Commercial production of calcium carbide requires limestone and __________ as raw materials.

A. Coke

B. Sand

C. Soda ash

D. Fuel oil

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Varnish does not contain

A. Thinner

B. Pigment

C. Both (A) & (B)

D. Neither (A) nor (B)

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Chemical formula of BHC, which is an insecticide is

A. C6H6Cl6

B. C6Cl6

C. C6H5Cl

D. C6H4Cl2

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__________ acid is the main constituent of cotton seed oil.

A. Acetic

B. Linoleic

C. Palmitic

D. Oleic

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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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Solvent extracted oil

A. Has low free fatty acid content

B. Is odourless

C. Has more of unsaturates

D. None of these

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Zeigler process

A. Produces high density polyethylene

B. Produces low density polyethylene

C. Uses no catalyst

D. Employs very high pressure

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Yeast is used in the manufacture of

A. Penicillin

B. Antibiotics

C. Wine

D. Pasteurised milk

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Sand and __________ is fused at 1300°C, to produce sodium silicate.

A. Limestone

B. Soda ash

C. Coke

D. Sodium sulphate

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Heating of __________ to 120°C, produces plaster of paris.

A. Blue vitriol

B. Gypsum

C. Calcium silicate

D. Calcium sulphate

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One of the steps during refining of cane sugar consists of addition of hydrated lime to the sugar syrup followed by carbonation of the resulting solution. The purpose of this step is to

A. Adjust the pH of the syrup

B. Remove the coloring matter from the syrup

C. Reduce the viscosity of the syrup

D. Improve the rate of crystallisation of sugar

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Blue vitriol is chemically

A. Copper sulphate

B. Ferrous sulphate

C. Copper nitrate

D. Aluminium sulphate

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At very high concentration of enzymes, the rate of fermentation chemical reaction is __________ the concentration of reactants.

A. Independent of

B. Directly proportional to

C. Inversely proportional to

D. Proportional to the square of

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Teflon is

A. Phenol formaldehyde

B. An inorganic polymer

C. Poly tetra-fluoro-ethylene (P.T.F.E.)

D. A monomer

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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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Which of the following is an endothermic reaction?

A. Absorption of SO3 in 98% H2SO4

B. C + H2O = CO + H2

C. Thermal dissociation of iron pyrites

D. Both (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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'Hollander beater' machine used in the paper manufacturing plant does not accomplish the task of

A. Final rolling out of paper

B. Cutting of fibres

C. Hydration of fibres

D. Fibrillation of fibre

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

A. Phosphates

B. Chromates

C. Sulphates

D. Bi-carbonates

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Fermentation is adversely affected by the

A. Presence of air

B. Absence of air

C. High concentration

D. Presence of ammonium salts

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Which of the following is not an insecticide?

A. Hydrocyanic acid

B. Nicotine

C. Sodium fluoride

D. Hexane

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Which of the following is not a raw material used for the manufacture of ordinary glass?

A. Iron oxide

B. Soda ash

C. Limestone

D. Silica

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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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Which of the following additives/water proofing agents is added to lower the hydrophilic (moisture loving) characteristic of cement?

A. Xanthates

B. Stearic acid

C. Calcium & aluminium stearate

D. Formic acid

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Acetone is produced by catalytic dehydrogenation of

A. Phenol

B. Naphthalene

C. Isopropanol

D. Ethyl benzene

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Metallic soap (e.g. aluminium or calcium salts of fatty acids) can be used

A. As a lubricant

B. As a rust preventive

C. In hard water for cleaning of cloth

D. As a foam depressant in distillation column