Answer:
Complete answer: 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.
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A liquid becomes a solid when energy is removed. The energy content decreases, and the speed of the particles decrease.
Reactions occur when two or more molecules interact and the molecules change. Bonds between atoms are broken and created to form new molecules. That's it.
The temperature of the lithosphere is around 300<span>°C</span> - 500<span>°<span>C</span></span>