During Starch Test Why Is Leaf Boiled in Alcohol?

We boil the leaf in alcohol when we are checking it for starch to eradicate chlorophyll, which is the green pigment present in leaves. ... Hence to dissolve the chlorophyll or the green pigment present in the leaf we boil the leaf in alcohol when we are testing it for starch.

What happens when a green leaf is boiled in alcohol?

Answer: the green leaf contains chlorophyll. when it is double boiled in alcohol, the alcohol changes its colour to green colour(of the chlorophyll) and the leaf turns pale white/yellow.

Why leaf is not boiled in alcohol directly?

The green leaf is boiled in alcohol not directly heated on flame during the testing for starch. This is because heating the green leaf directly on the flame, or boiling it in water will kill the leaf as the direct heat will damage the cells of the leaf. ... Then the leaf can be tested for presence of starch.