In contact process , moist gases are dried using , SO3 formed is absorbed using
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a
Conc. H2SO4 , H2O
b
Conc. H2SO4 , Conc. H2SO4
c
P2O5 ,Conc. H2SO4
d
CaO , H2SO4
answer is B.
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Detailed Solution
Drying agent in contact process is conc.H2SO4;It removes moisture from SO2 and O2SO3 is absorbed using conc.H2SO4 to form oleum;SO3+H2SO4conc→H2S2O7oleum ;