Question

how will you test for the presence of starch in a leaf ?
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Answer 1

Explanation:

the presence of starch in leaves can be tested by lodine test. when we remove chlorophyll from leaf

by boiling it in alcohol and the put 2 drop of iodine

solution,it's colour change to blue indicates the presence of strach.

hope it's helpful to you

Answer 2

The test which is used to identify the presence of starch in a leaf is the iodine test.

Explanation:

• starch is manufactured from excess glucose produced by photosynthesis takes place in the leaves of the plant and stored in amyloplasts.
• Plants like potatoes make starch in seeds and store it in their grains and tubers used for germination. the presence of starch is tested by the iodine test.
• The iodine test can distinguish starch from monosaccharides, disaccharides, and polysaccharides. natural starch contains $10\;-\;20\%$ of amylose and $80\;-\;90\%$ of amylopectin.
• In the iodine test when the sample  is added with iodine solution if the sample contains starch, it turns from blue to black.