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Using iodine solution, Biuret test, Benedict reagents and ethanol, respectively in testing for reducing sugars,...

Biology
WAEC 2002

Using iodine solution, Biuret test, Benedict reagents and ethanol, respectively in testing for reducing
sugars, which of the following trends of colour changes would be observed?

  • A. Blue → black → blue → brown → clear
  • B. Brown → blue → brick red → clear
  • C. Brown → violet → blue → clear
  • D. Brown → blue → violet → milky
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Correct Answer: Option B
Explanation
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