Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • NCERT
  • When air is blown from mouth into a test-tube containing lime water, the lime water turned milky due to the presence of (a) oxygen (b) carbon dioxide (c) nitrogen (d) water vapour

When air is blown from mouth into a test-tube containing lime water, the lime water turned milky due to the presence of
(a) oxygen
(b) carbon dioxide
(c) nitrogen
(d) water vapour

Answers (1)

Exp: Carbon dioxide turns lime water milky, confirming its presence. 

1. Blowing exhaled air into lime water creates limestone.
2. Lime water becomes milky with carbon dioxide.
3. The reaction is:  
   Ca(OH)?(aq) + CO?(aq) → CaCO?(s)↓ + H?O(l)

In short, blowing air from your mouth into lime water makes it milky due to carbon dioxide. Hence, (b) is the correct option.

Posted by

infoexpert26

View full answer

Similar Questions

Latest Question