Home
Current Affairs January 2024

What is the correct answer?

4

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

A. 10

B. 25

C. 50

D. 98

Correct Answer :

C. 50


Related Questions

What is the correct answer?

4

Insulin is an __________ drug.

A. Anti-malarial

B. Anti-TB

C. Antibiotic

D. None of these

What is the correct answer?

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

What is the correct answer?

4

Varnish does not contain

A. Pigment

B. Thinner

C. Dryer

D. Anti-skimming agent

What is the correct answer?

4

Styrene (a monomer for the production of polystyrene) is commercially produced by

A. Catalytic dehydrogenation of ethyl benzene

B. Dehydration of ethyl alcohol followed by hydrogenation

C. Reacting ethylene oxide with acetaldehyde

D. Fermentation of starch

What is the correct answer?

4

CaSO4 . ½H2O is known as

A. Blue vitriol

B. Plaster of Paris

C. Gypsum

D. Zeolite

What is the correct answer?

4

Styrene-butadiene-rubber (SBR) as compared to natural rubber has

A. Poorer tensile strength

B. Poorer resistance to oxidation

C. Greater amount of heat build-up under heavy loading

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

What is the correct answer?

4

Rotary kiln is not involved in the production of

A. Cement

B. Lime from limestone

C. Slaked lime from quick lime

D. None of these

What is the correct answer?

4

Pick out the wrong statement.

A. Kraft method of pulp manufacture can process all types of fibrous raw materials

B. Digestion time for bagasse is less than that for wood base materials

C. Both temperature and pressure in the digestor is less in case of the sulphite method as compared to that in the sulphate method

D. None of these

What is the correct answer?

4

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

What is the correct answer?

4

Detergent is produced by the sulphonation of dodecyl benzene, which is an __________ reaction.

A. Endothermic

B. Exothermic

C. Irreversible

D. Both (B) and (C)

What is the correct answer?

4

Oil produced by solvent extraction

A. Has low free fatty acid content

B. Is odourless

C. Both (A) & (B)

D. Neither (A) nor (B)

What is the correct answer?

4

Catalytic oxidation of naphthalene produces

A. Styrene

B. Phenol

C. Phthalic anhydride

D. None of these

What is the correct answer?

4

The basic constituent of vegetable oils is

A. Triglyceride

B. Fatty acids

C. Fatty alcohol

D. Mono esters

What is the correct answer?

4

The purpose of adding Na2CO3 to water of low alkalinity is to

A. Permit the use of alum as a coagulant

B. Increase the softening capacity of zeolite

C. Facilitate easy regeneration of zeolite

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

What is the correct answer?

4

Liquefaction of gases cannot be done by

A. Exchange of heat with colder stream

B. Adiabatic expansion through a throttle valve (Joule-Thomson expansion)

C. Merely compressing it beyond critical pressure

D. Adiabatic expansion against a piston or in a turbine

What is the correct answer?

4

Low temperature carbonisation of coal takes place at __________ °C.

A. 300

B. 1100

C. 700

D. 900

What is the correct answer?

4

Chemical name of 'alum' is

A. Barium sulphate

B. Aluminium sulphate

C. Aluminium chloride

D. Calcium sulphate

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

More than 100 percent of __________ is present in oleum.

A. SO3

B. H2SO4

C. H2SO3

D. SO2

What is the correct answer?

4

Fermentator temperature during production of alcohol from molasses is around __________ °C.

A. 5

B. 30

C. 130

D. 300

What is the correct answer?

4

CaO is called

A. Quick lime

B. Slaked lime

C. Limestone

D. Calcite

What is the correct answer?

4

Vulcanisation of rubber

A. Decreases its tensile strength

B. Increases its ozone & oxygen reactivity

C. Increases its oil & solvent resistance

D. Converts its plasticity into elasticity

What is the correct answer?

4

__________ is obtained as a by-product in the manufacture of sodium hydroxide using brine.

A. Chlorine

B. Ammonium chloride

C. Sodium carbonate

D. Sodium bi-carbonate

What is the correct answer?

4

Calcination of gypsum produces

A. Plaster of Paris

B. Salt cake

C. Nitre cake

D. Lime

What is the correct answer?

4

The metallic aluminium is obtained from pure alumina in the presence of fused cryolite by

A. Electrolysis

B. Electrolytic reduction

C. Electrolytic oxidation

D. None of these

What is the correct answer?

4

Inversion of sucrose produces

A. Fructose

B. Glucose

C. Both (A) & (B)

D. Neither (A) nor (B)

What is the correct answer?

4

Platinum catalyst used in the earlier days of sulphuric acid manufacture by contact process suffers from the drawback like

A. High cost

B. Fragile nature

C. Easy poisoning tendency

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

What is the correct answer?

4

Function of thinner in a paint is to

A. Accelerate the oxidation of oil

B. Prevent gelling of the paint

C. Suspend pigments & dissolve film forming materials

D. Form a protective film

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

'Hollander beater' machine used in the paper manufacturing plant does not accomplish the task of

A. Final rolling out of paper

B. Cutting of fibres

C. Hydration of fibres

D. Fibrillation of fibre