Write an experiment to demonstrate that heat is evolved during germination of seeds.

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Solution

Answer
Aim:
To show that heat is given out during the germination of seeds.
Apparatus required:
• Thermos flask, thermometer, cork and moist germinating seeds.

Procedure:
• Take a thermos flask and put some germinating seeds in it.
• Insert a thermometer in the flask and seal its mouths with the cork.
• Note the initial temperature.
• Again, note the temperature after two days.
• It is observed that the temperature in the flask rises due to the heat produced during the germination of seeds.
• While undergoing germination the seeds respire vigorously and produce large amounts of heat.

Conclusion:
• It can be concluded that heat evolved during the germination of seeds.

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Similar questions

Q. Which one of the following is the correct set of three precautions for setting up the experiment to demonstrate that carbon dioxide is evolved during respiration?
(1) Air tight set up; delivery tube dips in water in beaker; flask has seeds which have just germinated.
(2) Thread holding KOH test tube; air tight flask; delivery tube above surface of water in the beaker.
(3) Germinated seeds under water in the flask; experimental set up not air tight; delivery tube above water level.
(4) Delivery tube touching bottom of water; KOH test tube held by a thick wire; seeds covered by water.

Q. The most appropriate reason for taking germinating seeds in the experiment to show that carbon dioxide is produced during respiration, is :
(1) germinating seeds create high temperature
(2) germinating seeds are easy to handle
(3) germinating seeds are living things
(4) germinating seeds are in dormant to state

Q. Describe one experiment each you would perform to demonstrate the following phenomena:

The germinating seeds
1. Produce heat.

In the experiment to demonstrate that CO₂ is given out during respiration, why is KOH placed in the small test-tube in the flask containing germinating seeds?

Write an experiment to demonstrate that CO₂ is released during exhalation.

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