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Biology CBSE Live product
Class 10 (2025-26)
Life processes
Respiration and circulation
5.
Exhaled air and limewater
Question:
1.5
m.
Choose the correct answer
:
What happens when exhaled air is blown from mouth into a test-tube containing lime water?
No change is observed
Lime water turns milky
Lime water changes colour
Lime water changes into blue-black colour
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