Helium is produced on commercial scale from
Air
Natural gas
Coke oven gas
None of these
Correct Answer :
B. Natural gas
Related Questions
Haemoglobin is a/an
Amino acid
Biological catalyst
Protein
Enzyme
Soaps remove dirt by
Increasing the surface tension
Decreasing wettability
Supplying hydrophilic group
None of these
The most widely used coagulant for removing suspended impurities from water is
Bleaching powder
Chlorine
Calcium sulphate
Alum
Glauber's salt is chemically represented by
Na2SO4.10H2O
CaCl(OCl)
CaSO4.H2O
(NH4)2SO4
Hydrochloric acid is also known as
Oil of vitriol
Muriatic acid
Strong organic acid
Green acid
Varnish does not contain
Thinner
Pigment
Both (A) & (B)
Neither (A) nor (B)
Fish contains about __________ percent oil.
5
10
20
35
Reaction of an alcohol with organic acid is called the __________ reaction.
Saponification
Esterification
Neutralisation
Acidification
Thermosetting plastic materials
Can be repeatedly melted
Is useful for melt casting
Cannot be melted after forming
Is useful for spinning
Calgon used in water treatment is chemically
Sodium phosphate
Sodium hexametaphosphate
Calcium phosphate
Tricresyl phosphate
Concentration of NaOH solution produced by diaphragm electrolytic cell is about __________ percent.
10
25
50
98
Pick out the wrong statement pertaining to solvent extraction of oil. Rate of extraction
Decreases with decrease of thickness of the flakes
Increases with the increasing flake size keeping the flake thickness constant
Increases considerably with the rise of temperature
Decreases as the moisture content of flakes increases
At a given temperature, the equilibrium yield of SO3 obtained from the oxidation of SO2 is proportional to (where, P = pressure of the system).
P
√P
P2
1/P
Which allotrope of sulphur is insoluble in carbon disulphide?
Rhombic sulphur
Monoclinic sulphur
Plastic sulphur
Milk of sulphur
Mannheim furnace is used in the manufacture of
Hydrochloric acid
H2SO4 by Chamber process
Calcium carbide
Corundum
Sand and __________ is fused at 1300°C, to produce sodium silicate.
Limestone
Soda ash
Coke
Sodium sulphate
The catalyst used in the production of elemental sulphur from H2S (by oxidation-reduction) is
Alumina
Silica gel
Platinum
Nickel
Metallic soap is __________ salt of fatty acids.
Sodium
Potassium
Both sodium & potassium
Aluminium or calcium
Catalytic oxidation of naphthalene produces
Styrene
Phenol
Phthalic anhydride
None of these
Most commonly used rubber vulcanising agent is
Sulphur
Bromine
Platinum
Alumina
Which of the following is an yellow pigment?
Titanium dioxide
Ferrous sulphate
Lead chromates
Zinc sulphides
Nylon-6 is manufactured from
Caprolactam
Hexamethylene diamine and adipic acid
Hexamethylene diamine and Maleic anhydride
Hexamethylene diamine and Sebacic acid
Hard water
Does not affect the lather formation by soap
Is not unfit for drinking purpose
Pollutes the water stream
All (A), (B) and (C)
Which of the following is the main constituent of the mother liquor produced in salt industry?
Quick lime
Glauber's salt
Salt petre
Bromine
Electric bulbs are made of __________ glass.
Jena
Flint
Crookes
Pyrex
Flexible foam (for mattresses) is usually made of
PVC
Silicone
Polyurethanes
Polyamides
__________ is an ore of lead.
Quartz
Galena
Siderite
Chalcopyrite
Pick out the wrong statement.
Cold rubber (SBR) is superior as compared to hot rubber (SBR)
Polymerisation temperature can modify the properties of SBR
Production of cold SBR employs lower pressure as compared to that of hot SBR
None of these
Alcohol percentage in molasses may be around
10
40
70
85
Which of the following is an explosive?
Nitro-glycerine
Trinitrotoluene (TNT)
Cellulose nitrate
All (A), (B), and (C)