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Note: Iodine solution is added to starch. Thus, it turns from colourless to blue-black.
The digestion of starch by amylase into maltose causes the colour change from blue-black into colourless.
From 2008 Practical, digestion of starch (with iodine solution added) by amylase
b. Test-tube 1: starch and water; Test-tube 2: starch and amylase
(i) Benedict's test results
From 2019 practical, Effect of amylase on starch solution
a. Water bath for enzyme experiment (adjusting temperature using hot and tap water)
(ii) Iodine test results
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