if we bring a lighted splinter near a plant then will it start burning brightly to indicate that plant liberates oxygen?

Asked by Shwetika Barman | 29th Apr, 2013, 09:38: PM

Expert Answer:

If we bring a lighted splinter near a plant then will it start burning brightly only in the presence of light which is required for photosynthesis.
 
The complete experiment can be:
Take two big glass cans and place into them glasses filled with water. Place sprays with green leaves of any plant or small house plants in flowerpots, into the glasses. Fill the cans with carbon dioxide and close them tightly to prevent penetration of air. Expose the first can to bright light and leave the second one in darkness, for example, in a dark wardrobe.

In 24 hours, open the cans and bring into them burning splinters. A splinter brought into the first can will not die out, it will continue burning brightly, which means that some gas supporting burning appeared in the can. Only oxygen supports burning. Green leaves of the plant have absorbed a significant part of carbon dioxide and evolved some amount of oxygen.

A burning splinter brought into the second can will die out. Consequently, green plants evolve oxygen only at light.

Answered by  | 30th Apr, 2013, 10:29: AM

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