Chemistry
The substance added to SO3 to manufacture H2SO4 by contact process is :
- H2O
- H2SO4
- H2S2O7
- H2S
Sulphuric Acid
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Answer
H2SO4
Reason — The substance added to SO3 to manufacture H2SO4 by contact process is H2SO4. Sulphur trioxide on dissolving in water can produce sulphuric acid, but it does not dissolve in water satisfactorily and it gives a lot of heat and forms misty droplets of sulphuric acid so it is not directly absorbed by water. It is first absorbed by sulphuric acid to produce oleum. oleum is further diluted to produce H2SO4.
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When HCl is prepared by the reaction of NaCl with H2SO4, the property of H2SO4 exhibited is :
- Dehydrating agent
- Drying agent
- Oxidising property
- Non volatile acid
The catalyst preferred in contact process is :
- Pt
- V2O5
- Fe
- Pd
The role of sulphuric acid in the reaction given below is :
S + 2H2SO4 ⟶ 3SO2 + 2H2O
- Non volatile acid
- Oxidising agent
- Dehydrating agent
- None of the above
Dilute H2SO4 and conc. H2SO4 can be distinguished by :
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- Gold
- Platinum