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  • When  is passed into lime water, it turns milky. When excess of  is passed, milkiness disap

When CO_2 is passed into lime water, it turns milky. When excess of CO_2 is passed, milkiness disappears because:

Option: 1

Reaction is reversed


Option: 2

Ca(HCO_3)_2 is formed which is water soluble and colourless


Option: 3

Calcium derivative vaporise


Option: 4

None of these


Answers (1)

best_answer

As we have learnt,

When CO_2 is passed through lime water, it turns milky due to formation of CaCO_3. Upon passing excess of CO_2 through the solution, milkiness disappears due to formation of Ca(HCO_3)_2 which is soluble in water and colorless.

Hence, the correct answer is Options (2)

Posted by

Anam Khan

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