A sample of air that has been passed through caustic potash will
- contain more oxygen than nitrogen
- rekindle a glowing splint
-
have no action on lime water
- contain no water vapour
- be free of noble gases
The correct answer is: C
Explanation
- Potassium hydroxide also absorbs carbon dioxide from the air.
- If carbon dioxide is bubbled through limewater, the limewater turns milky or cloudy white.
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