Chemical formula of oleum is_________________?
A. H2SO3
B. H2SO4
C. H2S2O7
D. H2SO7
Chemical Process
Contact process of sulphuric acid manufacture ____________________?
Contact process of sulphuric acid manufacture ____________________?
A. Yields acid of higher concentration than chamber process
B. Yields acids of lower concentration than chamber process
C. Is obsolete
D. Eliminates absorber
Favourable conditions for the liquefaction of gases in general are _____________________?
Favourable conditions for the liquefaction of gases in general are _____________________?
A. High pressure & low temperature
B. Low pressure & high temperature
C. High pressure & high temperature
D. Low pressure & low temperature
Catalytic oxidation of toluene produces____________________?
Catalytic oxidation of toluene produces____________________?
A. Styrene
B. Phenol
C. Benzene
D. Tri-nitro-toluene
Hydrocyanic acid (HCN) is used as an insecticide for____________________?
Hydrocyanic acid (HCN) is used as an insecticide for____________________?
A. Controlling timber degradation by ants
B. Controlling poultry lice
C. Potato beetle
D. Citrus fruits
Penicillin is separated from fermented broth by ____________________?
Penicillin is separated from fermented broth by ____________________?
A. Extraction with amyl or butyl acetate
B. Ternary Azeotropic distillation
C. Evaporator in calandria
D. Extractive distillation
Carbon disulphide is mainly used in the production of______________________?
Carbon disulphide is mainly used in the production of______________________?
A. Viscose rayon
B. Corundum
C. Plasticiser for unsaturated polyester
D. Paints
In contact process, SO3 is absorbed in 97% H2SO4 and not in water, because___________________?
In contact process, SO3 is absorbed in 97% H2SO4 and not in water, because___________________?
A. SO3 gas is sparingly soluble in water
B. Water forms an acid mist, which is difficult to absorb
C. The purity of acid is affected
D. Scale formation in the absorber is to be avoided
Teflon is___________________?
Teflon is___________________?
A. Phenol formaldehyde
B. An inorganic polymer
C. Poly tetra-fluoro-ethylene (P.T.F.E.)
D. A monomer
Sea water contains about ______________________ ppm of bromine ?
Sea water contains about ______________________ ppm of bromine ?
A. 5
B. 70
C. 500
D. 1700