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Current Affairs January 2024

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4

Chloramines are used in water treatment for

A. Disinfection and control of taste & odour

B. Corrosion control

C. Removing turbidity

D. Control of bacteria

Correct Answer :

A. Disinfection and control of taste & odour


Related Questions

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Which of the following processes is absent in glass manufacturing process?

A. Sintering

B. Annealing

C. Shaping or forming

D. Melting

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Viscose rayon

A. Cannot be made from sulphite pulp

B. Utilises H2SO4, NaOH and CS2 during its manufacture

C. Cannot yield textile grade fibre

D. None of these

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4

Cement mainly contains

A. CaO, SiO2, Al2O3

B. MgO, SiO2, K2O

C. Al2O3, MgO, Fe2O3

D. CaO, MgO, K2O

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4

Brackish water which contains mostly dissolved salt, can be purified by the __________ process.

A. Reverse osmosis

B. Sand filter

C. Lime soda

D. Permutit

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Shrinkage volume in cement setting does not depend upon the

A. Sand to cement ratio

B. Water to cement ratio

C. Ambient temperature fluctuation

D. Drying period

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4

Chemical formula of 'salt cake' is

A. Na2SO4

B. CaSO4

C. MgSO4

D. BaSO4

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4

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

A. 50

B. 100

C. 200

D. 300

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Blue colour is imparted to glass by the addition of

A. FeSO4

B. PbO

C. CaO

D. NaOH

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Neoprene is the trade name of

A. Polyurethane

B. Phenol formaldehyde

C. Polychlorophrene

D. Styrene-butadiene rubber

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4

Lime and soda ash are added to water to remove

A. Bicarbonates & sulphates of calcium and magnesium

B. Undesirable taste and odour

C. Bacteria

D. Its corrosiveness

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4

Esterification reaction produces

A. Detergent

B. Vanaspati

C. Soap

D. Mercaptans

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Platinum is a versatile catalyst for many processes in chemical industries. It is highly prone to be poisoned by the presence of

A. Carbon

B. Arsenic

C. Lead

D. Sulphur

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Gypsum is chemically

A. Calcium chloride

B. Potassium sulphate

C. Sodium sulphate

D. Calcium sulphate

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The chamber process is

A. Preferred over contact process for producing 98 to 100% H2SO4 and various oleums

B. Non-catalytic and operates only on pyrites

C. A batch process for directly producing high strength (98 to 100%) H2SO4

D. None of these

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4

Concentration of NaOH solution produced by mercury electrolytic cell is about __________ percent.

A. 10

B. 25

C. 50

D. 98

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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

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4

Cumene is the starting material for the production of

A. Benzoic acid

B. Phenol and acetone

C. Isoprene

D. Styrene

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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

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Dehydrogenation of Isopropanol produces

A. Propyl alcohol

B. Acetone

C. Trichloroethylene

D. Formaldehyde

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Synthesis gas is a mixture of

A. CO and H2

B. N2 and H2

C. H2, CH4 and CO

D. CO2 and H2

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4

Carboxymethyl cellulose (CMC) is added in detergents to

A. Prevent redeposition of soil on cleaned surface

B. Act as optical brightening agent

C. Inhibit corrosion in washing machines made of aluminium

D. None of these

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4

The biochemical treatment applied to sewage effluents is a process of

A. Dehydration

B. Reduction

C. Oxidation

D. Polymerisation

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During the manufacture of sulphuric acid, the temperature of molten sulphur is not increased beyond 160°C, as

A. It is very corrosive at elevated temperature

B. Its viscosity is not reduced on further heating (hence pressure drop on pumping it, cannot be further reduced)

C. It decomposes on further increasing the temperature

D. None of these

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4

Celluloid is chemically

A. Cellulose acetate

B. Regenerated cellulose

C. Cellulose nitrate

D. Cellulose acetate butyrate

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Varnish does not contain

A. Pigment

B. Thinner

C. Dryer

D. Anti-skimming agent

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The difference between saponification value and acid value is

A. Called ester value

B. Always negative

C. Constant for all fatty oils

D. None of these

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4

Main constituent of limestone is

A. CaCO3

B. MgCO3

C. Na2CO3

D. CaSO4

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Sulphuric acid solution having a specific gravity of 1.20 at room temperature is used mainly for the

A. Fertiliser manufacture

B. Car battery solution

C. Synthesis of oleum

D. Water treatment

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4

Calcination of limestone is not done in a __________ kiln for producing lime.

A. Vertical shaft

B. Rotary

C. Fluidised bed

D. Fixed bed

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Ethanol amine is produced using ammonia and

A. Ethyl benzene

B. Ethylene oxide

C. Ethanol

D. Ethane