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Current Affairs January 2024

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Fusion of limestone and __________ produces high alumina cement.

A. Sand

B. Bauxite

C. Quicklime

D. Calcite

Correct Answer :

B. Bauxite


Related Questions

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Deaeration of water in its treatment is necessary, as it

A. Minimises its turbidity

B. Helps in controlling its taste and odour

C. Minimises its corrosiveness

D. None of these

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Which of the following is the most adverse factor challenging the choice of mercury electrolytic cell process for the production of caustic soda?

A. High cost of mercury

B. High specific gravity of mercury

C. Non-availability of high purity mercury

D. Pollution of water stream by mercury

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Haemoglobin is a/an

A. Amino acid

B. Biological catalyst

C. Protein

D. Enzyme

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__________ is used as a flux in the extraction of iron from iron ore (haematite) in blast furnace.

A. Bauxite

B. Limestone

C. Quartz

D. Manganese

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Industrial production of chloroform requires acetone and

A. Phosgene

B. Calcium hypochlorite

C. Chlorine

D. Ammonium chloride

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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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Glauber's salt is chemically

A. Calcium sulphate

B. Potassium sulphate

C. Potassium chlorate

D. None of these

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

A. 5

B. 30

C. 130

D. 300

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Which of the following, when pyrolysed, produces Perchloroethylene?

A. Ethylene dichloride

B. Chlorobenzene

C. Carbon tetrachloride

D. Chlorinated paraffin

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Chemical formula of oleum is

A. H2SO3

B. H2SO4

C. H2S2O7

D. H2SO7

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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

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Oxidation of SO2 to SO3 is favoured by

A. Low temperature and low pressure

B. Low temperature and high pressure

C. High temperature and low pressure

D. High temperature and high pressure

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'Synthesis gas' meant for the synthesis of organic compound is a variable mixture of

A. N2 & H2

B. CO2 & H2

C. CO & H2

D. C & H2

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Which of the following is used as a coagulant in treating turbid water?

A. Chlorine

B. Ferric sulphate

C. Calcium sulphate

D. Activated carbon

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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

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Which catalyst is used in the manufacture of ethylene oxide by oxidation of ethylene?

A. AgO

B. Al2O3

C. ZnCl2

D. Fe2O3

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__________ acid is an unsaturated fatty acid.

A. Palmitic

B. Oleic

C. Stearic

D. Oxalic

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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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Which of the following paper does not require a filler during manufacture?

A. Bond paper

B. Writing paper

C. Blotting paper

D. Coloured paper

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Pick out the wrong statement.

A. Eosin requirement in tallow soap is about 40-50% which fastens the lather formation, softens the hard soaps and increases its cleansing action

B. Soap powder is prepared by mixing soap with hydrated sodium carbonate

C. Detergents differ from soaps in their action in hard water

D. Tarnish inhibitor (e.g., Benzotriazole) is added in soap to facilitate the removal of stains due to tea, blood etc

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Dacron is a/an

A. Polyester

B. Unsaturated polyester

C. Polyamide

D. Inorganic polymer

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Flash point of most vegetable oils is about __________ °C.

A. 50

B. 100

C. 200

D. 300

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CO & H2 are the constituents of

A. Producer gas

B. Water gas

C. Coke oven gas

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

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Naphthalene is removed from coke oven gas by

A. Adsorbing on palladium

B. Absorbing in ethanolamine

C. Scrubbing with wash oil

D. Passing it through electrostatic precipitator

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4

Glycerine is recovered from lye by

A. Evaporation followed by vacuum distillation

B. Liquid extraction technique

C. Extractive distillation technique

D. None of these

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Consider the production of ammonia from methene and air as raw materials. The catalysts used are:
(i) __________ for steam reforming of methane and
(ii) __________ for ammonia synthesis.

A. (i) - Ni/Al2O3; (ii) - Cu - ZnO/Al2O3

B. (i) - Fe/Al2O3; (ii) - Cu - ZnO/Al2O3

C. (i) - Ni/Al2O3; (ii) - Fe/Al2O3

D. (i) - Fe/Al2O3; (ii) - Ni/Al2O3

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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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Finely ground calcium aluminate & silicate is a/an

A. Cermet

B. Cement

C. Abrasive

D. Explosive

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Most widely and commonly used coagulant for the removal of suspended impurities in water is

A. Bleaching powder

B. Slaked lime

C. Alum

D. Copper sulphate