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Current Affairs January 2024

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4

The noble gas which occurs most abundantly in the atmosphere is

A. Helium

B. Neon

C. Krypton

D. Argon

Correct Answer :

D. Argon


Related Questions

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With increase in temperature, the equilibrium constant at constant pressure (Kp) for oxidation of sulphur dioxide

A. Increases

B. Increases linearly

C. Decreases

D. Decreases linearly

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Nitrogen is an essential component of

A. Mineral salts

B. Carbohydrates

C. Fats

D. Proteins

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__________ is obtained as a by-product in the manufacture of sodium hydroxide using brine.

A. Chlorine

B. Ammonium chloride

C. Sodium carbonate

D. Sodium bi-carbonate

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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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Removal of dirt/soil by soaps or detergent does not involve the __________ of soil.

A. Emulsification

B. Dispersion

C. Precipitation

D. Wetting

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4

Blue vitriol is chemically

A. Copper sulphate

B. Ferrous sulphate

C. Copper nitrate

D. Aluminium sulphate

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4

Penicillin is separated from fermented broth by

A. Extraction with amyl or butyl acetate

B. Ternary Azeotropic distillation

C. Evaporator in calandria

D. Extractive distillation

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4

In an integrated steel plant, NH3 present in coke oven gas is normally recovered as

A. (NH4)2SO4

B. NH4Cl

C. (NH4)2 NO3

D. Liquid NH3

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4

Pick out the wrong statement.

A. Pasteurisation of milk involves moderate heating followed by cooling

B. Bakeries and breweries make use of yeasts

C. Enzyme is a complex nitrogenous compound

D. Oils and fats are alkaloids

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4

Use of chlorine in the treatment of sewage

A. Helps in grease separation

B. Increases the biological oxygen demand (BOD)

C. Causes bulking of activated sludge

D. Aids in flocculation

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4

Builders are added in soap to act as

A. Cleaning power booster

B. Anti-redeposition agent

C. Corrosion inhibitor

D. Fabric brightener

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4

Chrome tanning and vegetable tanning are done for

A. Light & heavy leather respectively

B. Heavy & light leather respectively

C. Both light & heavy leather

D. Neither light nor heavy leather

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4

Nickel is not used as a catalyst in the __________ reaction.

A. Shift conversion

B. Oil hydrogenation

C. Steaming reforming of naphtha

D. Ammonia cracking/dissociation

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4

In Kraft process of paper manufacture, white cooking liquor consists of caustic soda

A. Sodium sulphide & sodium carbonate

B. Sodium sulphite & sodium carbonate

C. Sodium sulphite & sodium sulphide

D. None of these

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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)

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4

Pick out the wrong statement.

A. Chamber process of sulphuric acid manufacture produces pure acid of concentration < 80%

B. Contact process of sulphuric acid manufacture produces pure acid of concentration ≥ 98%

C. 75% oleum can be produced by distillation of 20% oleum

D. Contact process of sulphuric acid manufacture uses nickel as the catalyst

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4

Percentage of uranium in Carnotite ore found in Jadugoda (Jharkhand) is about

A. 0.1 to 0.5

B. 1 to 5

C. 5 to 10

D. 15 to 25

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__________ are added in lacquers to remove film brittleness and to improve adhereness.

A. Film forming materials

B. Plasticisers

C. Diluents

D. Solvents

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4

Pick out the wrong statement pertaining to nitric acid.

A. About 90% of nitric acid is manufactured by Ostwald's process

B. It is a strong mono basic acid which reacts with almost all the metals except noble metals

C. Yellow color of impure nitric acid is because of dissolved oxides of nitrogen (mainly NO2)

D. Arc process of nitric acid manufacture is economical as compared to Ostwald's process

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4

Alum is commercially produced from

A. Gypsum

B. Feldspar

C. Galena

D. Bauxite

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4

Oils are partially hydrogenated (not fully) to manufacture Vanaspati, because fully saturated solidified oils

A. Cause cholesterol build up and blood clotting

B. Are prone to rancid oxidation

C. Always contain some amount of nickel (as their complete removal is very difficult)

D. Have affinity to retain harmful sulphur compounds

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4

Pick out the wrong statement.

A. Kraft method of pulp manufacture can process all types of fibrous raw materials

B. Digestion time for bagasse is less than that for wood base materials

C. Both temperature and pressure in the digestor is less in case of the sulphite method as compared to that in the sulphate method

D. None of these

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4

Glycerine can be obtained from

A. Fat

B. Naphthalene

C. Cumene

D. Sucrose

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4

Percentage of alcohol in beer may be around __________ percent.

A. 2-8

B. 18-23

C. 27-32

D. 1-4

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4

All enzymes are made of

A. Fats

B. Carbohydrates

C. Proteins

D. Amino acids

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Oil produced by solvent extraction

A. Has low free fatty acid content

B. Is odourless

C. Both (A) & (B)

D. Neither (A) nor (B)

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4

Analgesic drugs are

A. Pain relievers

B. Antibiotics

C. Used in the treatment of T.B.

D. Used in the treatment of typhoid

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4

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

A. Phosphates

B. Chromates

C. Sulphates

D. Bi-carbonates

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4

__________ glass is used for the manufacture of optical glass.

A. Pyrex

B. Soda

C. Flint

D. Crooke's

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Epoxy resin

A. Is a good adhesive

B. Is an elastomer

C. Cannot be used for surface coatings

D. Is a polyester