Limewater turn milky when carbon dioxide gas is passed through it:

Due to the formation of calcium carbonate.

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Due to the formation of calcium hydroxide.

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Because hydrogen gas is released.

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Because calcium hydroxide reacts with hydrogen gas.

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Solution

The correct option is A Due to the formation of calcium carbonate.
Limewater is calcium hydroxide solution and it is a base. Carbon dioxide reacts with the calcium hydroxide to form calcium carbonate and water. This can be represented as:

Calcium hydroxide + Carbon dioxide $\to$ Calcium carbonate + Water

Calcium carbonate obtained is white in colour and insoluble in water, hence it makes limewater appear milky.

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Similar questions

Q. Why lime water turns milky due to formation of white precipitate of calcium carbonate , when carbon dioxide gas is passed through lime water ?

When calcium carbonate reacts with dilute hydrochloric acid, a gas X is formed. When gas X is passed through lime water, it turns milky due to the formation of precipitate Y. So, Y is ____.

Lime water turns milky when carbon dioxide gas is passed through it due to the formation of _________.

Why does $C O_{2}$ turn lime water milky?

Q. Answer the question by selecting the appropriate option given below:

Assertion (A): The gas produced during the reaction of sodium carbonate with hydrochloric acid when passed through limewater, turns limewater milky.

Reason (R): Carbon dioxide reacts with limewater to form calcium hydrogen carbonate which forms a white precipitate.

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