Question

Describe an activity to show that exhaled air contains carbon dioxide​

Answer 1

Explanation:

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 .

Answer 2

Lime Water Breath Experiment
Using lime water is a fun and easy way to test for the presence of carbon dioxide. The exhaled carbon dioxide is used to produce a precipitate of calcium carbonate with the lime water.