DDT stands for
Diethyl-diphenyl-trichloromethane
Dichloro-diphenyl-trichloromethane
diphenyl-dichloro-trichloromethane
Dichloro-diphenyl-trichloroethane
Correct Answer :
D. Dichloro-diphenyl-trichloroethane
Related Questions
Styrene is produced from ethyl benzene by the process of
Dehydrogenation
Oxidation
Alkylation
Dehydration
Rotary kiln is not involved in the production of
Cement
Lime from limestone
Slaked lime from quick lime
None of these
10% oleum comprises of 10% free
SO2
H2SO3
SO3
H2SO4
Higher viscosity index of a lubricating oil denotes
Less changes in fluidity of oil with temperature
Substantially high change in fluidity of oil with temperature
Its unsuitability under varying temperature conditions
None of these
20% oleum means that in 100 kg oleum, there are 20 kg of
SO3 and 80kg of H2SO4
H2SO4 and 80kg of SO3
SO3 for each 100 kg of H2SO4
None of these
Nitric acid is not used in the manufacture of
Detergents
Fertilisers
Aqua regia
Explosives
Which of the following is not an antibiotic?
Penicillin
Streptomycin
Tetracycline
Quinine
Which of the following is not produced commercially from sea water?
Magnesium & potassium compounds
Common salt
Bromine
Iodine
Pick out the exothermic reaction out of the following:
C + H2O = CO + H2
CaC2 + H2O = Ca(OH)2 + C2H2
MgCO3 = MgO + CO2
All (A), (B) and (C)
Chemical formula of 'salt cake' is
Na2SO4
CaSO4
MgSO4
BaSO4
Naphthalene is removed from coke oven gas by
Adsorbing on palladium
Absorbing in ethanolamine
Scrubbing with wash oil
Passing it through electrostatic precipitator
Which of the following impurities in feed water for high pressure boiler is the most detrimental?
Silica
Dissolved oxygen
Suspended salt
Dissolved salt
Which of the following coals has the highest calorific value?
Lignite
Sub-bituminous
Anthracite
Peat
Trinitro-toluene (TNT) is
Used in glycerine manufacture
An explosive
Used in dye manufacture
None of these
Contact process of sulphuric acid manufacture
Yields acid of higher concentration than chamber process
Yields acids of lower concentration than chamber process
Is obsolete
Eliminates absorber
Washing soda is chemically represented by
Na2CO3
Na2CO3.H2O
Na2CO3.10H2O
NaHCO3
Most widely and commonly used coagulant for the removal of suspended impurities in water is
Bleaching powder
Slaked lime
Alum
Copper sulphate
Widely used method for the conditioning of boiler feed water is the
Cold lime process
Coagulation
Hot-lime soda process
Sequestration
Ore concentration by froth floatation utilises the __________ of ore particles.
Density difference
Wetting characteristics
Terminal velocities
None of these
Sea water contains about __________ ppm of bromine.
5
70
500
1700
Concentration of hydrogen peroxide is done by
Crystallisation
Vacuum crystallisation
Atmospheric distillation
Dehydration
Oils and fats are converted to soap in a process called
Hydrogenation
Esterification
Saponification
None of these
L.D. converter is used in the production of
Pig iron
Steel
Copper
Zinc
The only commercial Fischer-Tropsch plant for producing liquid hydrocarbon fuel from coal is located at
SASOL (in South Africa)
Redcar (U.K.)
Los Angeles (U.S.A.)
Trombay (India)
Conversion of SO2 to SO3 in Monsanto 4-pass converter is about __________ percent.
80
90
98
100
Low purity oxygen is used for
L.D. steel making
Cutting and welding of metals
Medicinal purposes
Chemical oxidation processes
In the production of soda ash by Solvay process, the by-product is
CaCl2
NH4Cl
NH3
NaOH
Bio-degradable detergents
Can be readily oxidised
Pose problem in sewerage plant
Have an isoparaffinic structure
Should not be used as it spoils the cloth
Catalytic oxidation of toluene produces
Styrene
Phenol
Benzene
Tri-nitro-toluene
Resistance to fusion of the refractory under a steady rising temperature condition is called
Spalling
Refractoriness
Both (A) & (B)
Neither (A) nor (B)