Foods containing starch will turn a blue-black colour. The iodine test can also be used with a microscope to stain starch grains in plant cells. Wear safety goggles. Sudan III solution is ...

The leaf on the right shows a positive test for starch in the areas which contained chlorophyll, and a negative test for starch in the areas which lack chlorophyll. This is evidence that ...

Heat test for vanaspati adulteration ... it indicates the presence of adulterants like vanaspati or starch,” said Priyanshi.