Define observation or inference for mucic acid test, Biology

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Define Observation or Inference for Mucic Acid Test?

1. White crystals of mucic acid will be seen.

2. The sugar solution contains galactose.

3. Lactose gives this test, since it contains galactose in its structure. On hydrolysis with concentrated HNO₃ lactose gives glucose and galactose. The concentrated acid further oxidizes galactose to galactosaccharic acid (mucic acid), which is insoluble and gives characteristic crystals.

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