device an activity to show that carbon dioxide is produced in respiration
Answers
Answer:
Experiment to prove that carbon dioxide is produced during respiration in germinating seeds.
Put some germinating seeds in a conical flask. The conical flask is fitted to a delivery tube bent twice at right angles by means of cork. ... The germinating seeds respires aerobically by utilizing the oxygen in the flask.
Explanation:
Germinate close to 25 seeds. This can be done by wrapping them in moist blotting paper or cotton wool for around 3 to 4 days
Set up the germinated or sprouted seeds in the conical flask. Spray some water into the flask to dampen the seeds
With the help of a thread, suspend the conical flask containing the test tube having a freshly prepared 20% KOH solution.
Use the rubber cork to seal the opening of the conical flask.
One edge of the U-shaped glass delivery tube present in the conical flask should be inserted through the hole in the rubber cork. The other end should be placed into a beaker that is saturated with water
All attachments of the set-up should be sealed. This can be done using vaseline to create an air-tight environment
The initial water level present in the U-shaped delivery tube needs to be marked.
Leave the experimental set-up uninterrupted for 1 to 2 hours. Observe the fluctuations in the water level in the tube.
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