Home
Current Affairs January 2024

What is the correct answer?

4

Which of the following is an additional step in the manufacture of paper from bagasse as compared to that from bamboo?

A. Depithing

B. Digestion

C. Bleaching

D. None of these

Correct Answer :

A. Depithing


Related Questions

What is the correct answer?

4

Dacron is a

A. Condensation product of Hexamethylene diamine and adipic acid

B. Thermosetting material

C. Condensation product of dimethyl terephthalate and ethylene glycol

D. None of these

What is the correct answer?

4

Mannheim furnace is used in the manufacture of

A. Hydrochloric acid

B. H2SO4 by Chamber process

C. Calcium carbide

D. Corundum

What is the correct answer?

4

Catalytic oxidation-dehydrogenation of methyl alcohol produces

A. Formaldehyde

B. Phenol

C. Acetone

D. Maleic anhydride

What is the correct answer?

4

Reaction of an alcohol with organic acid is called the __________ reaction.

A. Saponification

B. Esterification

C. Neutralisation

D. Acidification

What is the correct answer?

4

Alcohol percentage in molasses may be around

A. 10

B. 40

C. 70

D. 85

What is the correct answer?

4

Oils and fats are converted to soap in a process called

A. Hydrogenation

B. Esterification

C. Saponification

D. None of these

What is the correct answer?

4

Thermosetting materials

A. Are cross-linked molecules

B. Soften on application of heat

C. Are solvent soluble

D. None of these

What is the correct answer?

4

Fish contains about __________ percent oil.

A. 5

B. 10

C. 20

D. 35

What is the correct answer?

4

Low purity oxygen is used for

A. L.D. steel making

B. Cutting and welding of metals

C. Medicinal purposes

D. Chemical oxidation processes

What is the correct answer?

4

Digestion of wood-base materials (for manufacture of pulp) is done to

A. Remove lignin

B. Produce long fibres

C. Prevent deterioration on storage

D. None of these

What is the correct answer?

4

In multistage equilibrium conversion of SO2 to SO3 (2SO2 + O2 2SO3), the reverse reaction becomes appreciable at a temperature of 550° C. The percentage equilibrium conversion of SO2 to SO3 can be increased by

A. Increasing the oxygen concentration

B. Putting more quantity of V2O5 catalyst in the converter

C. Removing some quantity of SO3 during intermediate stage

D. Maintaining low temperature & pressure in the converter

What is the correct answer?

4

The process involved in converting rubber into a thin sheet or coating it on fabric is called

A. Extrusion

B. Mastication

C. Calendaring

D. Vulcanisation

What is the correct answer?

4

Molecular weight of plastics ranges from

A. 5000 to 10000

B. 20000 to 250000

C. 500 to 5000

D. 106 to 109

What is the correct answer?

4

Brackish water which contains mostly dissolved salt, can be purified by the __________ process.

A. Reverse osmosis

B. Sand filter

C. Lime soda

D. Permutit

What is the correct answer?

4

Which form of sulphur is the most stable at room temperature?

A. Plastic

B. Monoclinic

C. Rhombic

D. Flowers of sulphur

What is the correct answer?

4

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

What is the correct answer?

4

Platinum catalyst used in the earlier days of sulphuric acid manufacture by contact process suffers from the drawback like

A. High cost

B. Fragile nature

C. Easy poisoning tendency

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

What is the correct answer?

4

Styrene is produced from ethyl benzene by the process of

A. Dehydrogenation

B. Oxidation

C. Alkylation

D. Dehydration

What is the correct answer?

4

Antibiotic

A. Inhibits/destroys the growth of microorganisms

B. Is used as a pain reliever

C. Is an antimalarial

D. Is an anaesthetic

What is the correct answer?

4

Temperature during hydrogenation of oil should not be more than 200°C, otherwise it will result in

A. Pyrolysis of oil

B. Sintering of porous catalyst

C. Hydrogen embrittlement

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

What is the correct answer?

4

The most widely used coagulant for removing suspended impurities from water is

A. Bleaching powder

B. Chlorine

C. Calcium sulphate

D. Alum

What is the correct answer?

4

Enzymes are organic catalysts used in the __________ reactions.

A. Chemical

B. Biochemical

C. Photochemical

D. Electrochemical

What is the correct answer?

4

The most commonly used substance to speed up the sedimentation of sewage is

A. Lime

B. Sulphuric acid

C. Chlorine

D. Sodium bisulphite

What is the correct answer?

4

Shaving soaps are

A. Soft potassium soaps (potassium salt of fatty acid) with free Stearic acid to give lather a lasting property

B. Metallic soaps compounded with frothing agents

C. High free alkali soaps having excess of cane sugar and alcohol

D. None of these

What is the correct answer?

4

Epoxy resin

A. Is a good adhesive

B. Is an elastomer

C. Cannot be used for surface coatings

D. Is a polyester

What is the correct answer?

4

Proximate analysis of coal determines its __________ content.

A. Moisture, ash, sulphur & volatile matter

B. Moisture & volatile matter

C. Moisture, sulphur, nitrogen & fixed carbon

D. None of these

What is the correct answer?

4

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

What is the correct answer?

4

Commercial production of soda ash by Solvay process requires limestone, __________ as raw materials.

A. Coke and sand

B. Brine and coal

C. Coke and caustic soda

D. None of these

What is the correct answer?

4

Starting material for the production of butadiene in India is

A. Naphthalene

B. Benzol

C. Ethyl alcohol

D. Phthalic anhydride

What is the correct answer?

4

The combustion reaction, C + O2 = CO2, is

A. Exothermic

B. Endothermic

C. Autocatalytic

D. None of these