conclusion of carbon dioxide gas is evolved during respiration in plant
Answers
Experiment to Show Carbon Dioxide is Released During Respiration!
Objective:
To show experimentally that carbon dioxide is released during respiration.
Apparatus and Materials Required:
A conical flask, a beaker, a cork with a hole, a glass tube bent at right angles at two places, a small test tube, KOH solution, thread, coloured water. Vaseline and germinating seeds of gram or pea.
Theory:
Respiration is a catabolic process which involves the breakdown of food or complex organic molecules into simpler products, with the release of energy. This process can take place either in the presence of oxygen (aerobic respiration) or in its absence (anaerobic respiration).
The overall reaction mechanism of aerobic respiration involves the oxidation of carbohydrate and the subsequent production of CO2, H2O and energy.
C6H12O6+6O2 → 6CO2 + 6H2O + Energy
Procedure:
1. Take the conical flask and place some germinating gram or pea seeds in it.
2. Insert the shorter end of the glass tube through the hole in the cork and fix it on the conical flask.
3. Before fixing the cork, hang a test tube containing KOH solution inside the conical flask with the help of a thread.
4. Take coloured water in the beaker and keep the longer end of the glass tube dipped inside it.
5. Make the conical flask airtight by applying Vaseline on its rim.
6. Note the initial level of water in the tube.
7. Observe and note the rise in the water level after an hour, without disturbing the apparatus.
Observations:
Water level rises up in the bent tube.
Result:
The rise in the level of water indicates that CO2 is produced by germinating seeds during respiration. Actually, the germinating seeds respire and produce CO2, which is absorbed by KOH solution. This creates a vacuum in the conical flask. The air present in the bent glass tube moves into the conical flask. This pulls the water in the bent tube further up.
Precautions:
1. Keep the conical flask airtight.
2. Fix the shorter end of the glass tube in such a way that it does not touch the seeds.
3. Use freshly prepared KOH solution.
The rise in the water level indicates carbon dioxide evolution in plants.
Explanation:
- Plants can prepare their own food with the help of sunlight, carbon dioxide, water and evolve oxygen in the environment.
- The plants also perform photorespiration in which plant releases carbon dioxide especially in the germinating seeds.
- The experiment that contain the conical flask, water and KOH can be used for the illustration of carbon dioxide level.
- The KOH absorb the carbon dioxide and creates pressure that increases the high water level.
# Learn more with brainly about photo respiration:
https://brainly.in/question/5212665.
https://brainly.in/question/7082041.