Q.

  Lime water is-

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a

CaO   

b

Ca(OH)2

c

CaCO

d

 CaCI2

answer is B.

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Detailed Solution

The usual name for a saturated aqueous calcium hydroxide solution is limewater. At room temperature, calcium hydroxide, Ca(OH)2, is only weakly soluble in water. Clear and colourless, "pure" limewater has a faint earthy aroma and astringent/bitter flavour. It has a pH of 12.4, making it basic in nature.

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