Home
Current Affairs January 2024

What is the correct answer?

4

Widely used method for the conditioning of boiler feed water is the

A. Cold lime process

B. Coagulation

C. Hot-lime soda process

D. Sequestration

Correct Answer :

C. Hot-lime soda process


Related Questions

What is the correct answer?

4

A mineral is termed as 'ore', if

A. A metal can be economically extracted from it

B. It contains ≥ 40% metal

C. The metal present in it is costly

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

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

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

CaCl(OCl) is the chemical formula of

A. Hypo

B. Bleaching powder

C. Plaster of Paris

D. Aqua regia

What is the correct answer?

4

Sand and __________ is fused at 1300°C, to produce sodium silicate.

A. Limestone

B. Soda ash

C. Coke

D. Sodium sulphate

What is the correct answer?

4

Pick out the true statement pertaining to water treatment.

A. Slow sand filters can remove colour completely

B. Activated carbon can be used for taste & odour control without subsequent filtration

C. Application of activated carbon reduces the temporary hardness of water

D. Normally, the turbidity is removed by adding a coagulant prior to sedimentation

What is the correct answer?

4

Oleum produces fumes of

A. SO2

B. H2SO4

C. SO3

D. SO2 + H2SO4

What is the correct answer?

4

Esterification reaction produces

A. Detergent

B. Vanaspati

C. Soap

D. Mercaptans

What is the correct answer?

4

Commercial production of Vanaspati is done by __________ of edible vegetable oils.

A. Hydrogenation

B. Oxidation

C. Hydrolysis

D. Hydrocracking

What is the correct answer?

4

Bakelite is chemically known as

A. Polyvinyl chloride (PVC)

B. Polybutadiene

C. Phenol formaldehyde

D. Polyurethane

What is the correct answer?

4

Nylon-6 as compared to Nylon-66 is having higher

A. Hardness

B. Abrasion/resistance

C. Melting point

D. None of these

What is the correct answer?

4

Na2CO3.10H2O is called

A. Washing soda

B. Soda ash

C. Slaked lime

D. Quicklime

What is the correct answer?

4

Oxygen is produced by fractionation of air using __________ process.

A. Linde's

B. Claude's

C. Either (A) or (B)

D. None of these

What is the correct answer?

4

Which of the following is a detergent?

A. Fatty alcohol

B. Alkyl benzene sulphonate (ABS)

C. Fatty acids

D. Methylene chloride

What is the correct answer?

4

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

A. Film forming materials

B. Plasticisers

C. Diluents

D. Solvents

What is the correct answer?

4

Which of the following fuel gases contains maximum amount of carbon monoxide?

A. Coke oven gas

B. Water gas

C. Blast furnace gas

D. L.D. converter gas

What is the correct answer?

4

Dry ice (solidified CO2) is used for the

A. Storage & shipment of frozen foods and ice-creams

B. Liquefaction of permanent gases

C. Liquefaction of natural gas

D. None of these

What is the correct answer?

4

Vanillin is a type of

A. Anti-pyretic drug

B. Food preservative

C. Flavour

D. Dye

What is the correct answer?

4

Mercury electrolytic cells are preferred over diaphragm electrolytic cell (for production of caustic soda), as it

A. Has larger production capacity per unit cell

B. Consumes less power per ton of Cl2 produced

C. Produces high purity (70%) caustic soda directly

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

What is the correct answer?

4

Hydrogenation of oil does not

A. Remove double bonds

B. Raise its melting point

C. Improve its resistance to oxidation

D. None of these

What is the correct answer?

4

Paper pulp produced by Kraft/sulphate process is

A. Bleached easily

B. Dull white in color

C. Strong fibrous

D. Dark colored

What is the correct answer?

4

The drug used in contraceptives is

A. Sulfadiazine

B. Mestranol

C. Methyl salicylate

D. Penicillin

What is the correct answer?

4

Hydrogenation of oil takes place in a/an __________ reactor.

A. Autothermal

B. Trickle bed

C. Plug flow

D. None of these

What is the correct answer?

4

Fish contains about __________ percent oil.

A. 5

B. 10

C. 20

D. 35

What is the correct answer?

4

Temporary hardness of water can be removed by

A. Addition of alum (a coagulant)

B. Boiling

C. Filtration (through gravity sand filter)

D. Addition of lime

What is the correct answer?

4

Which of the following is a constituent of coffee?

A. Caffeine

B. Nicotine

C. Calgon

D. Lignin

What is the correct answer?

4

A unit operation is exemplified by the process of

A. Reduction

B. Desorption

C. Nitration

D. Combustion

What is the correct answer?

4

Polythene is a/an __________ polymerisation product.

A. Addition

B. Condensation

C. Thermosetting

D. None of these

What is the correct answer?

4

Glycerine is not used in the

A. Manufacture of explosive

B. Conditioning and humidification of tobacco

C. Manufacture of pharmaceuticals

D. None of these

What is the correct answer?

4

Which of the following is the second major component of cement?

A. Al2O3

B. CaO

C. SiO2

D. Fe2O3