TO SHOW THE PRESENCE OF CARBON-DIOXIDE WHEN WE BREATHE OUT AIR OUT (EXHALE)

Let's see which gas do we breathe out (exhale).

Materials:
Lime water
Straw
Glass

Instructions

Pour some lime water into the glass.
Now put the straw into the lime water. Then blow into it.


Observe: The lime water turns milky showing the presence of carbon-dioxide!!!