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Question

Why conc. sulphuric acid is not used to dry hydrogen?


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Solution

These are the following reasons

1. Conc. H2​SO4 on absorbing water from moisture produces so much heat that H2 catches fire. Therefore, it is not used for drying hydrogen.

2. Conc. sulphuric acid is not used to dry hydrogen because it reacts with hydrogen and forms sulphur dioxide gas.

H2SO4Sulphuricacid+H22H2O+SO2Sulphurdioxide


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