Home
Current Affairs January 2024

What is the correct answer?

4

Calcareous & argillaceous materials are used in the manufacture of

A. Lead

B. Cement

C. Carbon disulphide

D. None of these

Correct Answer :

B. Cement


Related Questions

What is the correct answer?

4

Lubricating greases are a mixture of

A. Mineral oil, soap and additives

B. Mineral oil and metallic soap

C. Mineral oil and fatty oil

D. Fatty oil and metallic soap

What is the correct answer?

4

Production of one ton of cement requires about __________ tons of limestone.

A. 0.6

B. 1.2

C. 2.2

D. 3.8

What is the correct answer?

4

Pick out the endothermic reaction out of the following.

A. C+ ½O2 = CO

B. CO + 3H2 = CH4 + H2O

C. CaCO3 = CaO + CO2

D. CO + ½O2 = CO2

What is the correct answer?

4

Vegetable oils contain large quantity of glycerides of unsaturated acids. When the vegetable oils contain high amount of saturated fatty acids, it is termed as __________ oil.

A. Drying

B. Semi-drying

C. Non-drying

D. None of these

What is the correct answer?

4

Diaphragm electrolytic cell as compared to mercury electrolytic cell

A. Produces 70% NaOH solution

B. Requires less specific power consumption for the production of chlorine

C. Requires lesser investment for similar capacity

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

What is the correct answer?

4

Permanent hardness of water can be removed by

A. Boiling

B. Adding Ca(OH)2

C. Boiling it with Na2CO3

D. None of these

What is the correct answer?

4

In industrial nomenclature, alcohol means

A. Butyl alcohol

B. Propyl alcohol

C. Ethanol

D. Methyl alcohol

What is the correct answer?

4

Which one of the following is not an elastomer?

A. Polyisoprene

B. Neoprene

C. Nitrile-butadiene

D. None of these

What is the correct answer?

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

What is the correct answer?

4

Average sulphur content in Indian pyrites is about __________ percent.

A. 15

B. 35

C. 55

D. 70

What is the correct answer?

4

Which is the most suitable dye for synthetic fibres?

A. Acid dye

B. Azoic dye

C. Pigment dye

D. Mordant dye

What is the correct answer?

4

Solvent used for extraction of oil is

A. Hexane

B. Methyl ethyl ketone

C. Furfural

D. None of these

What is the correct answer?

4

Bitterns is a/an

A. Unsaturated fat

B. Starting material for the production of iodine

C. By-product of chlor-alkali industry

D. None of these

What is the correct answer?

4

__________ is a thermosetting plastic.

A. Polythene

B. Epoxy polymer

C. P.V.C.

D. Polystyrene

What is the correct answer?

4

Ethylene oxide is produced by oxidation of ethylene in presence of AgO catalyst at

A. 1 atm & 100°C

B. 5 atm & 275°C

C. 100 atm & 500°C

D. 50 atm & 1000°C

What is the correct answer?

4

Pick out the wrong statement.

A. High early strength cement are made from materials having high silica to lime ratio

B. The function of gypsum in cement is to enhance its initial setting rate

C. Acid resistant cements are known as silicate cement

D. Major component of greyish Portland cement is tricalcium silicate

What is the correct answer?

4

Carbon content of pitch (residue of coal tar distillation) is around __________ percent.

A. 70

B. 55

C. 80

D. 94

What is the correct answer?

4

Hydrazine is used in water treatment for the removal of

A. Colloidal impurities

B. Dissolved oxygen

C. Turbidity

D. Chlorinous taste

What is the correct answer?

4

Phenolic antiseptics are added in the __________ soap.

A. Shaving

B. Medicated

C. Metallic

D. Transparent

What is the correct answer?

4

Hydrogen gas is not produced commercially (for nitrogenous fertiliser manufacture) by

A. Iron-steam reaction

B. Electrolysis of water

C. Steam reforming of naphtha

D. Its cryogenic separation from coke oven gas

What is the correct answer?

4

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

A. 50

B. 100

C. 200

D. 300

What is the correct answer?

4

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

What is the correct answer?

4

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

A. Sulphate

B. Carbonate

C. Hydroxide

D. Bi-carbonate

What is the correct answer?

4

Separation of fresh water from sea water can be done by the __________ operation.

A. Osmosis

B. Reverse osmosis

C. Absorption

D. Adsorption

What is the correct answer?

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

What is the correct answer?

4

Laboratory glass wares which reacts with hydrofluoric acid, are made of the __________ glass.

A. Lead

B. Borosilicate

C. Soda lime

D. Alkali silicate

What is the correct answer?

4

Bisphenol A is produced by the condensation of acetone with

A. Formaldehyde

B. Ethyl alcohol

C. Diethyl ether

D. Phenol

What is the correct answer?

4

__________ Nature of hypo (sodium thiosulphate) makes it useful in photography.

A. Oxidising

B. Reducing

C. Complex forming

D. Photochemical

What is the correct answer?

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

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