1.

Quicklime and slaked lime are the cheapest and the most widely used bases for neutralising unwanted acids. Lime is used to neutralise acidic soils. A important application of quicklime is in air pollution control for the removal of SO_(2) in electric power plants. Slaked lime is used in the manufacture of other alkalis and bleaching powder, in sugar refining, in tanning hides and in water softening The drying agent which absorbs CO_(2) and reacts violently with water is

Answer»

`CaCO_(3)`
`Ca(HCO_(3))_(2)`
`Ca(OH)_(2)`
`CaCI_(2)`

Solution :Temporary hardness is due to the PRESENCE of BICARBONATES of Ca and Mg. By using slaked lime `Ca(OH)_(2)` it was REMOVED
`Ca(OH)_(2) + Ca(HCO_(3))_(2) rarr 2CaCO_(3) darr + 2H_(2)O`


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