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A white powdered solid when added to w...

A white powdered solid when added to water produces hissing sound . Identify the compound. How does this compound react with moist hydrogen chloride gas ? Write the chemical equation .

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The white powdered solid is lime .It reacts with moist hydrogen chloride gas to form calcium chloride .
`CaO+2HCl to underset("Calcium chloride")(CaCl_(2))+H_(2)O`
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