Which of the following is the purest form of water out of the following?
Underground water
Rain water
Well water
Lake water
Correct Answer :
B. Rain water
Related Questions
Epoxy resin
Is a good adhesive
Is an elastomer
Cannot be used for surface coatings
Is a polyester
Parathion and Malathion are
Pesticides
Plasticisers for unsaturated polyesters
Pain-relieving drugs (analgesic)
Tranquilisers
Alcohol percentage in molasses may be around
10
40
70
85
Metallic soap is __________ salt of fatty acids.
Sodium
Potassium
Both sodium & potassium
Aluminium or calcium
Litharge is
Lead oxide
Zinc oxide
Zinc sulphide
Cellulosic photographic material
Laboratory glass wares which reacts with hydrofluoric acid, are made of the __________ glass.
Lead
Borosilicate
Soda lime
Alkali silicate
Na2CO3.10H2O is called
Washing soda
Soda ash
Slaked lime
Quicklime
Main constituents of natural rubber is
Polystyrene
Polyisoprene
Polybutadiene
Polychlorophrene
Percentage of uranium in Carnotite ore found in Jadugoda (Jharkhand) is about
0.1 to 0.5
1 to 5
5 to 10
15 to 25
Ceramics are produced from silicates or clayish materials: Which of the following is not a ceramic material?
Slag cement
Glasses
Porcelain/Potteries
Teflon
'Synthesis gas' meant for the synthesis of organic compound is a variable mixture of
N2 & H2
CO2 & H2
CO & H2
C & H2
Cement setting under water employs a/an __________ process.
Hydration
Decomposition
Oxidation
Reduction
Chrome tanning and vegetable tanning are done for
Light & heavy leather respectively
Heavy & light leather respectively
Both light & heavy leather
Neither light nor heavy leather
Which of the following is not an antibiotic?
Penicillin
Streptomycin
Tetracycline
Quinine
Permanent hardness of water can be removed by
Simply boiling
Adding alum
Passing it through cation & anion exchangers
All (A), (B) and (C)
A mineral is termed as 'ore', if
A metal can be economically extracted from it
It contains ≥ 40% metal
The metal present in it is costly
All (A), (B) and (C)
How much temperature is maintained during quicklime manufacture in the calcination zone of the vertical shaft kiln?
500°C
750°C
1000°C
1500°C
Vinyl chloride (CH2 = CH.Cl) is produced by the thermal pyrolysis of ethylene dichloride at a pressure & temperature of
4 kgf/cm2 & 500°C
10 kgf/cm2 & 1000°C
40 kg/cm2 & 200°C
100 kgf/cm2 & 500°C
High magnesia lime is added to hot sugar cane juice (during the manufacture of sugar) to
Flocculate the impurities
Facilitate fast filtration
Both (A) and (B)
Neither (A) nor (B)
Oxidation of ortho-xylene in presence of __________ catalyst is done to produce phthalic anhydride on commercial scale.
Nickel
Vanadium
Alumina
Iron
Sulphuric acid completely saturated with sulphur trioxide is called
Concentrated sulphuric acid
Oleum
Sulphurous acid
Dilute sulphuric acid
Which of the following fuel gases contains maximum amount of carbon monoxide?
Coke oven gas
Water gas
Blast furnace gas
L.D. converter gas
Fusion of bauxite and __________ produces high alumina cement.
Alum
Limestone
Coke
Quartz
Glauber's salt is chemically
Calcium sulphate
Potassium sulphate
Potassium chlorate
None of these
Which of the following is an additional step in the manufacture of paper from bagasse as compared to that from bamboo?
Depithing
Digestion
Bleaching
None of these
Bromine content in sea water may be around __________ ppm.
70
640
1875
2500
Average sulphur content in Indian pyrites is about __________ percent.
15
35
55
70
In contact process, SO3 is absorbed in 97% H2SO4 and not in water, because
SO3 gas is sparingly soluble in water
Water forms an acid mist, which is difficult to absorb
The purity of acid is affected
Scale formation in the absorber is to be avoided
Zeolite is a/an
Naturally occuring clay which is capable of exchanging cations
Abrasive material
Catalyst used in shift conversion
None of these
Phenol formaldehyde
Employs addition polymerisation
Employs condensation polymerisation
Is a monomer
Is an abrasive material