Give reasons:
When the gas formed on heating limstone is passed through freshly prepared lime water, the lime water turns milky.

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Solution

The Gas formed on heating limestone is Carbon dioxide. When this gas is passed through lime water, it forms Calcium Carbonate or limestone which turns milky.

Reaction for the above is-
When Limestone is heated,
$C a C O_{3} \to C a O + C O_{2} .$
(limestone)

When Carbon Dioxide is passed through lime water,

$C O_{2} + C a (O H)_{2} \to C a C O_{3} ↓ + H ₂ O .$
(lime water)

Reason :
When Carbon dioxide is passed through Lime water or Calcium Hydroxide, it turns milky due to the formation of the Precipitate of the insoluble milky Calcium Carbonate.

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Similar questions

C O_{2}

Statement 1- Lime water turns milky when air is passed through the solution.

Statement 2- Air contains carbon dioxide which turns lime water milky.

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

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