Give scientific reasons.
When the gas formed on heating limestone is passed through freshly prepared lime water, the lime water turns milky.
When limewater (CaOH)2 is passed through a gas, CO2, the following reaction takes place:
⇒ In this reaction, when limewater comes in contact with the gas released in the form of an effervescence, it turns milky. This is chemical test for carbon dioxide gas.
⇒ When limewater turns milky, it is confirmed that the effervescence is of carbon dioxide.
⇒ ‘Lime water turning milky’ is the test of carbon dioxide gas.
