The raw materials for the manufacature of calcium carbide are
A.limestone and coke
B.limestone and slaked lime
C.limestone and sand
D.limestone and caustic soda
Category: Chemical Technology Mcqs
When sulphur dioxide is passed through a golution of hydrogen sulphide in water
A.sulphuric acid is formed in solution
B.sulphurous acid is formed in solution
C.sulphur is precipitated
D.no change is observed
Plaster of paris is obtained by heating
A.limestone to 120-130?C
B.soda ash to 120-130?C
C.dolomite to 120-130?C
D.gypsum to 120-130?C
Bleaching powder is manufactured by the action of CI2 on
A.quicklime
B.slaked lime
C.milk of lime
D.soda lime
The degree of ionisation does not depend upon
A.nature of solvent
B.nature of solute
C.temperature
D.current strength
The most efficient agent for the absorption of SO3 is
A.80% H2SO4
B.98.5% H2SO4
C.90% H2SO4
D.20% oleum
In the manufacture of sulphuric acid by contact process platinum catalyst was previously used but suffers from
A.easy poisoning
B.fragility
C.high initial investment
D.all of these answers
Compared to mercury electrolytic cells diaphragm electrolytic cells
A.consume less power per ton of chlorine produced
B.require less initial investment for the same capacity
C.can produce 70% NaOH solution
D.uses saturated NaCI solution with solid NaCI make-up
Select the wrong statement. Compared to platinum catalyst vanadium pentoxide catalyst used in contact process for the manufacture of H2SO4
A.is relatively immune to poisons
B.requires low initial investment and 5% replacement per year
C.requires low O2/SO2 to give economic conversion
D.requires dilute SO2 input (7-10%)
The producer gas is mainly used in
A.petroleum refinery
B.fertilizer industry
C.steel industry
D.pharmaceutical industry
