Get premium membership and access revision papers with marking schemes, video lessons and live classes.
  OR
Processing. Please wait.

 Form 1 Chemistry Topical Questions and Answers on Air and Combustion

Using iron fillings, describe an experiment that can be conducted to show that oxygen is present in air.

 (4m 18s)
1488 Views     SHARE

Answer Text:
- Moisten a measuring cylinder and sprinkle some iron fillings in the cylinder.
- Invert the cylinder in a water trough containing water and note the level of water in the cylinder.
- After 2 to 3 days, iron fillings will turn from grey to brown and the water level in the measuring cylinder therefore rises to occupy the space left by oxygen present in air.


|