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21 August, 21:51

2. If you had three unknowns which are starch, BaSO4, and MgO, how can you identify starch among them?

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  1. 21 August, 22:14
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    A chemical test for starch is to add iodine solution (yellow/brown) and look for a colour change. In the presence of starch, iodine turns a blue/black colour
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