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Why is moist hydrogen made to react with chlorine to give hydrogen chloride?
Moist hydrogen reacts with chlorine in diffused sunlight to give out hydrogen chloride. Why is moist hydrogen used? Why not dry hydrogen?
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Is trisulfuric acid hypothetical?
In the preparation of sulfuric acid through contact process,
Hot sulfur trioxide passes through the heat exchanger and is dissolved in concentrated $\ce{H2SO4}$ in the absorption tower to form oleum:
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