Alum is commercially produced from___________________?
A. Gypsum
B. Feldspar
C. Galena
D. Bauxite
Chemical Process
In nylon-66, the first and second numbers (i.e., 6) respectively designate the number of carbon atoms present in the__________________?
In nylon-66, the first and second numbers (i.e., 6) respectively designate the number of carbon atoms present in the__________________?
A. Diamine and the ring
B. Dibasic acid and the ring
C. Diamine and the dibasic acid
D. None of these
Ethylene oxide is produced by oxidation of ethylene in presence of AgO catalyst at __________________?
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
Conversion of SO2 to SO3 in Monsanto 4-pass converter is about ____________________ percent?
Conversion of SO2 to SO3 in Monsanto 4-pass converter is about ____________________ percent?
A. 80
B. 90
C. 98
D. 100
Styrene is produced from ethyl benzene by the process of__________________?
Styrene is produced from ethyl benzene by the process of__________________?
A. Dehydrogenation
B. Oxidation
C. Alkylation
D. Dehydration
Calcination of gypsum produces__________________?
Calcination of gypsum produces__________________?
A. Plaster of Paris
B. Salt cake
C. Nitre cake
D. Lime
Which is the most efficient absorbent for SO3 out of the following ?
Which is the most efficient absorbent for SO3 out of the following ?
A. 20% oleum
B. 65% oleum
C. 78% H2SO4
D. 98% H2SO4
DDT should not be allowed to come in contact with iron (during its manufacture) to _______________?
DDT should not be allowed to come in contact with iron (during its manufacture) to _______________?
A. Avoid its decomposition
B. Prevent sulphonation of the monochlorobenzene by the acid catalyst
C. Achieve non-hygroscopic property
D. None of these
______________ are added in lacquers to remove film brittleness and to improve adhereness?
______________ are added in lacquers to remove film brittleness and to improve adhereness?
A. Film forming materials
B. Plasticisers
C. Diluents
D. Solvents
10% oleum comprises of 10% free_________________?
10% oleum comprises of 10% free_________________?
A. SO2
B. H2SO3
C. SO3
D. H2SO4