Question

Show experimentally the presence of oxygen in air
with the help of diagram​

Answer 1

Answer:

$\huge\sf\underline\red{Required\: Answer}$

Conclusion: While burning the air inside the bell-jar expands due to the heat and pushes the water down. ... When the apparatus cools, the air occupies less space which makes the water level rise in the bell jar. It proves that air contains oxygen.

Sorry mate I can't provide uhh a diagram