Conversion of SO2 to SO3 in Monsanto 4-pass converter is about ____________________ percent?
A. 80
B. 90
C. 98
D. 100
Month: February 2019
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
حضور ؐ کا چوتھے آسمان پر اسم مبارک کیا ہے ________؟
حضور ؐ کا چوتھے آسمان پر اسم مبارک کیا ہے ________؟
مزکی .❶
مجیب .❷
عبدالقدوس .❸
مظہر .❹
The catalyst used in the production of elemental sulphur from H2S (by oxidation-reduction) is _____________________?
The catalyst used in the production of elemental sulphur from H2S (by oxidation-reduction) is _____________________?
A. Alumina
B. Silica gel
C. Platinum
D. Nickel
Catalyst used in the hydrogenation of oil is_________________?
Catalyst used in the hydrogenation of oil is_________________?
A. Nickel
B. Platinum
C. Iron
D. Alumina