Onions contains reducing sugars which include fructose, and glucose.
Steps involved in testing for reducing sugar
Reducing sugar are those sugars that contains free aldehyde groups which can be reduced further in a reaction.
Examples include of simple reducing sugar include fructose and glucose.
The steps that are involved in testing for the reducing sugar include the following:
- Cut the onion into small pieces and put into a test tube.
- Add a few drops of Benedict's solution to the food solution.
- Heat the test tube in a water bath.
- If the solution turns orange-red, the food contains sugar.
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