Question
With the help of an experiment, explain that carbon dioxide is released during respiration.
✓
Answer
1.Take a small test tube containing lime water.
2.Place a small amount of germinating seeds in a conical flask and cover it with a cotton plug.
3.Connect the flask to the test tube with tubing so that air exhaled or released from seeds passes into the lime water.
4.Keep the setup for some time.
Observation: The lime water turns milky, indicating the presence of carbon dioxide.
Conclusion: This shows that germinating seeds respire and release carbon dioxide, which reacts with lime water to produce calcium carbonate, making the water milky. This experiment demonstrates that carbon dioxide is a byproduct of respiration in living organisms.
2.Place a small amount of germinating seeds in a conical flask and cover it with a cotton plug.
3.Connect the flask to the test tube with tubing so that air exhaled or released from seeds passes into the lime water.
4.Keep the setup for some time.
Observation: The lime water turns milky, indicating the presence of carbon dioxide.
Conclusion: This shows that germinating seeds respire and release carbon dioxide, which reacts with lime water to produce calcium carbonate, making the water milky. This experiment demonstrates that carbon dioxide is a byproduct of respiration in living organisms.
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Here is a crossword puzzle: Good luck!
Across
$3.$ Liquid waste products
$4.$ Solid waste extracted in sewage treatment
$6.$ A word related to hygiene
$8.$ Waste matter discharged from human body
Down
$1.$ Used water
$2.$ A pipe carrying sewage
$5.$ Micro-organism which causes cholera
$7.$ A chemical to disinfect water
→Across
$3.$ Liquid waste products
$4.$ Solid waste extracted in sewage treatment
$6.$ A word related to hygiene
$8.$ Waste matter discharged from human body
Down
$1.$ Used water
$2.$ A pipe carrying sewage
$5.$ Micro-organism which causes cholera
$7.$ A chemical to disinfect water