Question

Describe an activity to show that carbondioxide is exhaled during breathing according to 7th Class​

Answer 1

Answer:

Answer. Take a test tube fill it with freshly prepared lime water take a straw dip it inside lime water and then exhale you will find that the lime water turns its colour to white like milky colour. This shows that the air which we exhale is carbon dioxide

Explanation:

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Answer 2

Answer:

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. ... Fix the shorter end of the glass tube in such a way that it does not touch the seeds.