Question

An observation for testing for reducing sugar in bread

Answer 1

Answer:

If the colour changes to blue ,then no glucose is present

Answer 2

Answer:

Brainiest me

Explanation:

All simple sugars (e.g.glucose) are reducing sugars. They will react with a blue liquid called Benedict's solution to give a brick red color. We can use this reaction to find out if a food or other substance contains a reducing sugar.

Process  

• add a few drops of Benedict's solution

• heat the mixture for 2-3 minutes in a boiling water bath

• a BRICK RED/ORANGE COLOR is a positive result: glucose is present

• The closer the color is to brick red, the more reducing sugar is present.

Explanation

• Reducing Sugars are sugars that contain aldehyde groups, that are oxidized to carboxylic acids (R-COOH).

• They are classified as reducing sugars since they reduce the blue Cu2+(copper II ions) to Cu+ (copper I ions). These are precipitated in form of red Cu2O (copper oxide), insoluble in water.

Illustrations

• When the concentration of reducing sugar is low, the color of Benedict's test may be light green or pale orange.