Home
Current Affairs January 2024

What is the correct answer?

4

Deaeration of water in its treatment is necessary, as it

A. Minimises its turbidity

B. Helps in controlling its taste and odour

C. Minimises its corrosiveness

D. None of these

Correct Answer :

C. Minimises its corrosiveness


Related Questions

What is the correct answer?

4

The gasification reaction represented by, C + H2O = CO + H2, is a/an __________ reaction.

A. Exothermic

B. Endothermic

C. Catalytic

D. Autocatalytic

What is the correct answer?

4

Main constituent of limestone is

A. CaCO3

B. MgCO3

C. Na2CO3

D. CaSO4

What is the correct answer?

4

Multistage catalytic converter is not used in the

A. Conversion of SO2 to SO3

B. NH3 synthesis reaction

C. Both (A) and (B)

D. Neither (A) nor (B)

What is the correct answer?

4

Hydrogenation of vegetable oils is a/an __________ reaction.

A. Endothermic

B. Autocatalytic

C. Exothermic

D. Homogenous

What is the correct answer?

4

In the Lurgi coal gasifier

A. Coking coals cannot be used

B. Low carbon conversion efficiency is achieved

C. Entrainment of solids is higher

D. Large quantity of coal can be processed

What is the correct answer?

4

Which of the following is not an insecticide?

A. Hydrocyanic acid

B. Nicotine

C. Sodium fluoride

D. Hexane

What is the correct answer?

4

A mixture of chlorine & sodium bromide acts as a/an

A. Insecticides

B. Analgesic drug

C. Fire retardant

D. Hydrogenation catalyst

What is the correct answer?

4

Which of the following is an ore of iron?

A. Galena

B. Chalcopyrite

C. Hematite

D. Bauxite

What is the correct answer?

4

Zeolite used in water softening process (cation exchange) is regenerated by washing with

A. Brine

B. Chloramines

C. Sodium bisulphite

D. Liquid chlorines

What is the correct answer?

4

Gun powder uses

A. Sulphur

B. Charcoal

C. Potassium nitrate

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

What is the correct answer?

4

Which of the following may be viewed as a catalyst in the manufacture of soda ash by Solvay process?

A. NH3

B. NaCl

C. CaO

D. Coke

What is the correct answer?

4

Phenol formaldehyde is produced by condensation polymerisation. It is also known as

A. Teflon

B. Bakelite

C. Polyester

D. Nylon-66

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

Glycerine can be obtained from

A. Fat

B. Naphthalene

C. Cumene

D. Sucrose

What is the correct answer?

4

Rancidity of the fatty oil can be reduced by its

A. Decoloration

B. Hydrogenation

C. Oxidation

D. Purification

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

What is the correct answer?

4

Heating of __________ to 120°C, produces plaster of paris.

A. Blue vitriol

B. Gypsum

C. Calcium silicate

D. Calcium sulphate

What is the correct answer?

4

Flux addition during smelting of ore is done to

A. Remove impurities/gangue

B. Enhance rate of reaction

C. Accelerate reduction of ore

D. Separate slag from metal

What is the correct answer?

4

Cooking liquor in case of sulphite process is

A. Sodium sulphite and sodium bisulphite

B. Magnesium sulphite and free SO2 in acid medium

C. Magnesium sulphate and magnesium bicarbonate

D. None of these

What is the correct answer?

4

Fourdrinier machine is used in the manufacture of

A. Sugar

B. Paper

C. Alcohol from molasses

D. Phenol formaldehyde

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

Concentration of hydrogen peroxide is done by

A. Crystallisation

B. Vacuum crystallisation

C. Atmospheric distillation

D. Dehydration

What is the correct answer?

4

Solvay process is not used for the manufacture of potassium carbonate, because of the reason that potassium bicarbonate

A. Is prone to thermal decomposition

B. Has high water solubility and is unstable

C. Is soluble in ammonium chloride and potassium chloride solution

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

What is the correct answer?

4

Sulphuric acid saturated with SO3 is called

A. Concentrated H2SO4

B. Sulphurous acid

C. Oleum

D. None of these

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

Antibiotic

A. Inhibits/destroys the growth of microorganisms

B. Is used as a pain reliever

C. Is an antimalarial

D. Is an anaesthetic

What is the correct answer?

4

Deaeration of water in its treatment is necessary, as it

A. Minimises its turbidity

B. Helps in controlling its taste and odour

C. Minimises its corrosiveness

D. None of these

What is the correct answer?

4

Ceramics are produced from silicates or clayish materials: Which of the following is not a ceramic material?

A. Slag cement

B. Glasses

C. Porcelain/Potteries

D. Teflon

What is the correct answer?

4

Cement setting under water employs a/an __________ process.

A. Hydration

B. Decomposition

C. Oxidation

D. Reduction

What is the correct answer?

4

__________ is an ore concentrating metallurgical process involving a chemical change.

A. Electromagnetic separation

B. Froth floatation

C. Roasting

D. None of these