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Current Affairs January 2024

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Acrylonitrile is mainly used in the __________ industry.

A. Polymer

B. Printing

C. Dyeing

D. Photographic

Correct Answer :

C. Dyeing


Related Questions

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The most stable allotropic form of phosphorous is the __________ phosphorous.

A. White

B. Black

C. Yellow

D. Red

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In the manufacture of H2SO4, vanadium catalyst as compared to platinum catalyst

A. Gives higher conversion efficiency

B. Has a longer life and is not poisoned by arsenic

C. Handles lower SO2 content gas (7 -10% SO2), thus increasing the capital cost of the plant

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

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Low temperature carbonisation of coal takes place at __________ °C.

A. 300

B. 1100

C. 700

D. 900

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Fermentator temperature during production of alcohol from molasses is around __________ °C.

A. 5

B. 30

C. 130

D. 300

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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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Coal tar is used as a

A. Binding material for coal briquettes

B. Fuel in rotary kiln

C. Binder in making carbon electrodes

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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Dacron (or Terylene) fibres as compared to nylon fibres have

A. Better heat & acid resistant properties

B. Poorer resistance to alkalis

C. Poorer dyeability

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

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High acid value of an oil or fat is an indication of

A. Storage under improper conditions

B. Absence of unsaturation

C. Its smaller molecular weight

D. None of these

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All enzymes are made of

A. Fats

B. Carbohydrates

C. Proteins

D. Amino acids

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Alum [Al2(SO4)3] is used as a coagulant in water treatment to remove

A. Colour

B. Turbidity

C. Bacteria

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

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Mannheim furnace is used in the manufacture of

A. Hydrochloric acid

B. H2SO4 by Chamber process

C. Calcium carbide

D. Corundum

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During the absorption of HCl gas in water (to produce liquid HCl), the gas is kept above dew point to

A. Increase the rate of absorption

B. Avoid corrosion

C. Reduce the cooling water circulation rate

D. None of these

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Which of the following sugars is the sweetest?

A. Glucose

B. Fructose

C. Sucrose

D. Lactose

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Nylon-66 is so named because the

A. Average degree of polymerisation of the polymer is 1966

B. Number of carbon atoms between two nitrogen atoms are 6

C. Number of nitrogen atoms between two carbon atoms are 6

D. Polymer was first synthesised in 1966

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Graphite is a/an

A. Electrical insulator

B. Allotrope of carbon

C. Moderator used in nuclear reactor

D. Both (B) and (C)

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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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Phenol formaldehyde

A. Employs addition polymerisation

B. Employs condensation polymerisation

C. Is a monomer

D. Is an abrasive material

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Reverse osmosis is normally used for the

A. Separation of isotopes of uranium from gaseous uranium hexafluoride

B. Separation of helium from natural gas

C. Desalination of brackish water to produce potable (drinking) water

D. Purification of oxygen

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Plasticisers are added to synthetic plastics to

A. Impart flexibility

B. Improve workability during fabrication

C. Develop new improved properties not present in the original resins

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

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Favourable conditions for the liquefaction of gases in general are

A. High pressure & low temperature

B. Low pressure & high temperature

C. High pressure & high temperature

D. Low pressure & low temperature

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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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Solvay process as compared to dual process
(i.e. modified Solvay process).

A. Can use low grade brine

B. Has less corrosion problems

C. Involves higher investment in NH3 recovery units than that for crystallisation units for NH4Cl

D. Both (B) and (C)

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__________ process is used for the commercial production of nitric acid by the catalytic oxidation of ammonia.

A. Solvay

B. Ostwald's

C. Haber's

D. None of these

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Refractory bricks having high thermal conductivity is desirable, when it is to be used in the

A. L.D. converter

B. Blast furnace

C. Rotary kiln

D. Recuperator

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Hydrazine is largely used

A. As a starting material for 'hypo'

B. In photographic industry

C. As rocket fuel

D. In printing industry

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Sucrose is a disaccharide consisting of

A. Glucose and glucose

B. Glucose and fructose

C. Glucose and galactose

D. Fructose and galactose

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Economics of 'Solvay Process' depends upon the efficiency of

A. Carbonating tower

B. Ammonia recovery

C. Ammonia recovery and size of the plant

D. Ammoniation of salt solution

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4

90% of the caprolactam is converted to nylon-6 on its condensation polymerisation in the reactor maintained at __________ °C.

A. < 0

B. 10-30

C. 250-280

D. 500-600

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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