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Current Affairs January 2024

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4

Lindane is

A. Not a fumigant

B. BHC (Benzene Hexachloride) containing 99% γ-isomer

C. A by-product of BHC manufacture

D. Both (B) and (C)

Correct Answer :

B. BHC (Benzene Hexachloride) containing 99% γ-isomer


Related Questions

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Concentration of NaOH solution produced by mercury electrolytic cell is about __________ percent.

A. 10

B. 25

C. 50

D. 98

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4

Penicillin is made employing __________ fermentation process.

A. Continuous

B. Aerobic batch

C. Anaerobic batch

D. None of these

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4

Starting raw material for the manufacture of alum is

A. Alumina

B. Gypsum

C. Bauxite

D. Ammonium bicarbonate

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4

Phthalic anhydride is made by the

A. Oxidation of naphthalene

B. Oxidation of benzene

C. Dehydrogenation of ethyl benzene

D. None of these

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4

The main aim behind cooling the digested chip at the bottom portion of the digestor by injecting cold black liquor is to

A. Avoid mechanical weakening of fibre

B. Remove lignin by way of crystallisation

C. Increase the cellulose content

D. None of these

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4

Alcohol content in freshly prepared natural and fortified wine may be respectively around __________ percent.

A. 7-14 and 14-30

B. 7-14 and 40-50

C. 14 - 30 and 40-50

D. 10 - 20 and 40 - 50

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4

Nitro-glycerine absorbed in wood flour, sodium nitrate or ammonium nitrate is commercially used as controlled explosive called dynamite. The raw material used for its manufacture are glycerine, nitric acid and

A. Sulphuric acid

B. Phosphoric acid

C. Hydrochloric acid

D. Hydrofluoric acid

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4

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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4

Commercial scale production of hydrogen from iron-steam reaction represented by, 3Fe + 3H2O = Fe3O4 + 4H2, is not practised, as it is

A. A slow reaction

B. A discontinuous reaction (requiring regeneration of iron by water gas intermittently)

C. Still in development stage (by employing fluidised bed technique)

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

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

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4

Fusion of limestone and __________ produces high alumina cement.

A. Sand

B. Bauxite

C. Quicklime

D. Calcite

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4

The biochemical treatment applied to sewage effluents is a process of

A. Dehydration

B. Reduction

C. Oxidation

D. Polymerisation

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4

The product obtained on mixing calcium oxide with water is called

A. Quicklime

B. Slaked lime

C. Milk of lime

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

Absorption of SO3 in 97% H2SO4 is

A. Exothermic

B. Endothermic

C. Not possible

D. None of these

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4

The major constituent of black liquor generated during paper manufacture is sodium

A. Sulphate

B. Carbonate

C. Hydroxide

D. Bi-carbonate

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4

Ethanol amine is produced using ammonia and

A. Ethyl benzene

B. Ethylene oxide

C. Ethanol

D. Ethane

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4

Coke oven gas consists mainly of

A. H2, & CH4

B. CO, & CO2

C. H2, & CO

D. CH4, & CO

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4

Commercially ethylene is produced from naphtha by

A. Catalytic cracking

B. Catalytic dehydrogenation

C. Pyrolysis

D. Hydrocracking

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4

Hydrogenation of vegetable oils is a/an __________ reaction.

A. Endothermic

B. Autocatalytic

C. Exothermic

D. Homogenous

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Titanium dioxide is a/an __________ colour pigment.

A. White

B. Black

C. Yellow

D. Blue

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4

Gun powder, which is an explosive comprises of charcoal, sulphur and

A. Glycerine

B. Salt petre

C. Nitro glycerine

D. Dynamite

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4

Pick out the wrong statement.

A. Azoic dyes are mostly applied on cotton fabrics

B. Basic dyes (e.g. amino derivatives) are applied mostly to paper

C. Mordant dyes are applied mainly to wools

D. None of these

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4

Coloured glass is obtained by mixing of colored salts. Addition of __________ oxide is done to impart greenish blue color to the glass.

A. Chromium

B. Arsenic

C. Copper

D. Manganese

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4

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

A. 2000

B. 700

C. 1100

D. < 500

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In the Lurgi coal gasifier

A. Coking coals cannot be used

B. Low carbon conversion efficiency is achieved

C. Entrainment of solids is higher

D. Large quantity of coal can be processed

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4

Main constituent of dolomite is

A. CaCO3

B. MgCO3

C. K2CO3

D. Na2CO3

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4

Polymethyl methacrylate (PMMA) is known as

A. Bakelite

B. Teflon

C. Perspex

D. Nylon-6

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4

The main product of high temperature carbonisation of coal is

A. Coke

B. Ammonia

C. Tar

D. Phenol