. Lime water turns milky when .............. gas is passed through it


Lime water turns milky when .............. gas is passed through it

(a) Carbon dioxide

(b) Hydrogen

(c) Oxygen

(d) Nitrogen dioxide

 

Best Answer

Ans. (a) Lime water turns milky when carbon dioxide gas is passed through it

 calcium hydroxide + Carbon dioxide → Calcium Carbonate + Water

 Ca(OH)2 CO2 CaCO3 (milky) H2O

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