Home
Current Affairs January 2024

What is the correct answer?

4

Commercial production of soda ash by Solvay process requires limestone, __________ as raw materials.

A. Coke and sand

B. Brine and coal

C. Coke and caustic soda

D. None of these

Correct Answer :

B. Brine and coal


Related Questions

What is the correct answer?

4

Blue vitriol is chemically

A. Copper sulphate

B. Ferrous sulphate

C. Copper nitrate

D. Aluminium sulphate

What is the correct answer?

4

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

What is the correct answer?

4

Magnesium and calcium __________ cause temporary hardness of water.

A. Carbonates

B. Bicarbonates

C. Phosphates

D. Sulphates

What is the correct answer?

4

Claude process of gas liquefaction employs

A. Merely compression of gas beyond its critical pressure

B. Joule-Thomson expansion cooling

C. Heat exchange with colder stream

D. Adiabatic expansion against a piston or in a turbine

What is the correct answer?

4

Starting material for the production of styrene butadiene rubber (SBR) is

A. Ethyl alcohol

B. Ethylene

C. Both (A) & (B)

D. Neither (A) nor (B)

What is the correct answer?

4

The manufacture of Kraft pulp is done by a/an __________ process.

A. Alkaline

B. Acidic

C. Neutral

D. None of these

What is the correct answer?

4

The amount of benzene present in pure Benzol is about __________ percent.

A. 30

B. 50

C. 70

D. 90

What is the correct answer?

4

Which of the following is used as a binding material in soap to improve soap texture?

A. Rosin

B. Borax

C. Benzyl acetate

D. Sodium carbonate

What is the correct answer?

4

Transparent soaps (e.g. Pears) are

A. Usually soft soap (made from coconut oil) in which cane sugar & alcohol are added and finally washed with methylated spirit to achieve transparency

B. Metallic soaps with frothing agent and free Stearic acid to achieve transparency

C. Metallic soaps with frothing agent from which glycerine has not been recovered

D. None of these

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

Cumene (isopropyl benzene) is made by

A. Oxidation of naphthalene

B. Propylene alkylation of benzene

C. Polymerisation of a mixture of benzene & propylene

D. None of these

What is the correct answer?

4

Production of one ton of dry paper pulp requires about __________ tons of bamboo or wood.

A. 1

B. 2.5

C. 5

D. 10

What is the correct answer?

4

Ordinary glass is not a/an

A. Amorphous isotropic material

B. Supercooled liquid

C. Material with sharp definite melting point

D. Electrical insulator

What is the correct answer?

4

Phenol formaldehyde

A. Employs addition polymerisation

B. Employs condensation polymerisation

C. Is a monomer

D. Is an abrasive material

What is the correct answer?

4

Neon gas is

A. Flammable in nature

B. Used in color discharge tube

C. Filled in lamps having tungsten filament

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

What is the correct answer?

4

Main product in calcium carbide-water reaction is

A. Ca(OH)2

B. C2H2

C. CO2

D. CaCO3

What is the correct answer?

4

Which of the following coals has the highest calorific value?

A. Lignite

B. Sub-bituminous

C. Anthracite

D. Peat

What is the correct answer?

4

The function of gypsum addition during cement making is to

A. Increase the density of cement

B. Decrease the cement setting rate

C. Both (A) and (B)

D. Neither (A) nor (B)

What is the correct answer?

4

Black liquor is converted into white liquor by

A. Evaporation and burning the concentrate followed by causticisation of products

B. Multi-effect evaporation only

C. Selective liquid extraction

D. Extractive distillation

What is the correct answer?

4

Roasting of metallurgical ores is done mainly to

A. Dehydrate it

B. Sinter the ore

C. Remove CO2 & H2O

D. Remove arsenic & sulphur

What is the correct answer?

4

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

What is the correct answer?

4

Which of the following processes does not produce Cl2 as a co-product during the manufacture of caustic soda?

A. Diaphragm electrolytic cell process

B. Mercury electrolytic cell process

C. Lime-soda process

D. None of these

What is the correct answer?

4

Starting material for the production of butadiene in India is

A. Naphthalene

B. Benzol

C. Ethyl alcohol

D. Phthalic anhydride

What is the correct answer?

4

BHC (Benzene hexachloride) is made by the chlorination of benzene

A. Which is an addition reaction

B. Which is a substitution reaction

C. In absolute dark

D. In presence of sunlight

What is the correct answer?

4

Double Contact Double Absorption (DCDA) process is the most recent process for the manufacture of

A. Nitric acid

B. Sulphuric acid

C. Ammonium sulphate

D. Hydrochloric acid

What is the correct answer?

4

One of the steps during refining of cane sugar consists of addition of hydrated lime to the sugar syrup followed by carbonation of the resulting solution. The purpose of this step is to

A. Adjust the pH of the syrup

B. Remove the coloring matter from the syrup

C. Reduce the viscosity of the syrup

D. Improve the rate of crystallisation of sugar

What is the correct answer?

4

A cane sugar factory having sugar production rate of 10 tons/day will produce about __________ tons/day of bagasse (after consumption by the factory for heating etc.).

A. 1

B. 10

C. 25

D. 40

What is the correct answer?

4

Potassium is kept & transported under

A. Water

B. Liquid ammonia

C. Kerosene oil

D. Alcohol

What is the correct answer?

4

Catalyst used in the manufacture of sulphuric acid by chamber & contact processes are respectively

A. V2O5 & Cr2O3.

B. Oxides of nitrogen & Cr2O3

C. V2O5 on a porous carrier & oxides of nitrogen

D. Oxides of nitrogen & V2O5 on a porous carrier

What is the correct answer?

4

Sodium carbonate (soda ash) is not used in the manufacture of

A. Fire extinguishers

B. Sugar

C. Baking powder

D. Detergents