Question

What procedure did you follow to observe oxygen produced during photosynthesis in the presence of light

Answer 1

To prove that the oxygen is evolved during the "photosynthesis in the presence of sunlight".

Explanation:

The following experiment is done,

• The hydrilla plant is twigs in a short funnel which is kept inside the beaker containing the water.
• The test tube is inverted over the "stem of the funnel".
• This apparatus is placed in sunlight for 2-3 hrs.
• The oxygen in the gas bubbles appears at the end of the test tube.
• The test tube is removed gently.
• The incense stick is introduced into a gas bubble which flames resulting, which show the presence of oxygen.