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When CO2(g) is passed to lime water, the...

When C`O_2`(g) is passed to lime water, there is appearance of milkiness. Milkiness of the solution disappears on passing excess C`O_2` to it, due to the formation of

A

CaC`O_3`

B

Ca`(HC`O3`)_2`

C

Ca`(OH)_2`

D

CaO

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