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Question

If CO2 is passed in excess into lime water, the milkiness first formed disappears due to

A
reversal of the original reaction
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B
formation of volatile calcium derivative
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C
formation of water soluble calcium bicarbonate
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D
the solution getting heated by exothermic reaction
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Solution

The correct option is C formation of water soluble calcium bicarbonate

CaO + CO2 CaCO3

CaCO3 + H2­O + CO2 Ca(HCO3)2


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