Competition In Leaf
A cobalt chloride paper turns from to when exposed to moisture.
For the purpose of conducting an experiment, you took two cobalt chloride paper slides of identical dimensions and fixed one on the upper surface and the other on the lower surface of a leaf of a healthy dicot plant.
You kept the setup in bright sunlight.
After 8 hours , on which surface will the cobalt chloride paper be more
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Water in plants escapes out from it through tiny pore like structures called Stomata which are present in leaves. Much more stomata are present on the lower surface of a leaf when compared to the upper surface . Hence, more amount of water vapor (or moisture) will escape out from the lower surface. As a result, the cobalt chloride paper fixed on the lower surface of the leaf will turn more p i n k e r .