Question

when the gas formed on heating limestone is passed through freshly prepared lime water, the lime water turns milky​

Answer 1

the gas is carbon dioxide when caco3 is heated then calcium hydroxide and carbon dioxide is formed when it passes in to lime water it turns milky way white

calcium hydroxide add with carbon dioxide get calcium carbonate

Answer 2

Answer:

plz brainliest

Explanation:

(i) On heating, limestone undergoes thermal

decomposition to form calcium oxide (quick

lime) and carbon dioxide.

CaCO3(s) ∆ CaO(s) + CO2

↑

quick lime

(ii) Calcium oxide when dissolved in water forms

Calcium hydroxide (lime water).

CaO(s) + H2

O(l) → Ca(OH)2(aq)

Calcium  hydroxide

(iii) When carbon dioxide is passed through lime

water it turns milky due to formation of white

precipitate of Calcium carbonate.

Ca(OH)2(aq) + CO2(g) → CaCO3(s) + H2

O(l)

Calcium  carbonate