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Current Affairs January 2024

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4

Synthetic glycerine is produced from

A. Toluene

B. Phenol

C. Propylene

D. Naphthalene

Correct Answer :

C. Propylene


Related Questions

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4

In the manufacture of sulphuric acid from elemental sulphur, the following sequence of major operations is followed:

A. Furnace → converter → absorber

B. Furnace → evaporator → absorber

C. Furnace → converter → evaporator

D. Converter → furnace → absorber

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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

Bleaching action of bleaching powder is due to its __________ properties.

A. Reducing

B. Oxidising

C. Disinfecting

D. None of these

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4

Paper grade bamboo contains about __________ percent cellulose.

A. 5

B. 20

C. 40

D. 60

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4

Which oil is preferred for paint manufacture?

A. Drying oil

B. Non-drying oil

C. Semi-drying oil

D. Saturated oil

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4

Fermentation is adversely affected by the

A. Presence of air

B. Absence of air

C. High concentration

D. Presence of ammonium salts

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4

Glauber's salt is chemically

A. Calcium sulphate

B. Potassium sulphate

C. Potassium chlorate

D. None of these

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4

Isopropyl benzene produced by alkylation of benzene with propylene is known as

A. Neoprene

B. Cumene

C. Gelatin

D. Mercaptans

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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

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4

Solvay process is used for the manufacture of

A. Caustic soda

B. Soda ash

C. Caustic potash

D. Soda lime

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4

Solvent extracted oil

A. Has low free fatty acid content

B. Is odourless

C. Has more of unsaturates

D. None of these

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4

Salt cake is chemically represented by

A. Na2SO4

B. CaSO4. ½H2O

C. MgSO4

D. BaSO4

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4

Coke used for the production of calcium carbide should have

A. Low ash content

B. Low ignition temperature

C. High electrical resistivity

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

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4

A good quality coal should have

A. Low fusion point of ash

B. High ash content

C. High sulphur content

D. None of these

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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

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4

Yellow glycerine is made into white, using

A. Activated carbon

B. Diatomaceous earth

C. Bauxite

D. Bentonite

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4

Type of glass used in optical work is the __________ glass.

A. Soda-lime

B. Fibre

C. Lead

D. Borosilicate

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4

Ethylene oxide is produced by oxidation of ethylene in presence of AgO catalyst at

A. 1 atm & 100°C

B. 5 atm & 275°C

C. 100 atm & 500°C

D. 50 atm & 1000°C

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4

Main product in calcium carbide-water reaction is

A. Ca(OH)2

B. C2H2

C. CO2

D. CaCO3

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4

Production of one ton of cement requires about __________ tons of limestone.

A. 0.6

B. 1.2

C. 2.2

D. 3.8

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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

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4

Use of chlorine in the treatment of sewage

A. Helps in grease separation

B. Increases the biological oxygen demand (BOD)

C. Causes bulking of activated sludge

D. Aids in flocculation

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4

Fat dispersed in water is exemplified by

A. Colloids

B. Gel

C. Butter

D. Emulsion

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4

Carbon content of pitch (residue of coal tar distillation) is around __________ percent.

A. 70

B. 55

C. 80

D. 94

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4

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

A. Brine

B. Chloramines

C. Sodium bisulphite

D. Liquid chlorines

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4

Calcination of gypsum produces

A. Plaster of Paris

B. Salt cake

C. Nitre cake

D. Lime

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4

Phthalic anhydride is used

A. In making PVC

B. As plasticisers

C. In insecticides manufacture

D. For making nylon-6

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4

The major constituent of black liquor generated during paper manufacture is sodium

A. Sulphate

B. Carbonate

C. Hydroxide

D. Bi-carbonate

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4

Coloured glass is obtained by mixing of colored salts. Addition of __________ oxide is done to impart greenish blue color to the glass.

A. Chromium

B. Arsenic

C. Copper

D. Manganese

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4

The most commonly used substance to speed up the sedimentation of sewage is

A. Lime

B. Sulphuric acid

C. Chlorine

D. Sodium bisulphite