NUTRITION
CARBOHYDRATES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Biuret test
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Iodine test
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Benedict’s test
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Brown paper bag test
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Detailed explanation-1: -We can use a special reagent called Benedict’s solution to test for simple carbohydrates like glucose. Benedict’s solution is blue but, if simple carbohydrates are present, it will change colour – green/yellow if the amount is low and red if it is high.
Detailed explanation-2: -Generally, Benedict’s test detects the presence of aldehydes, alpha-hydroxy-ketones, and hemiacetals, including those that occur in certain ketoses.
Detailed explanation-3: -The principle of Benedict’s test is that when reducing sugars are heated in the presence of an alkali they get converted to powerful reducing species known as enediols. When Benedict’s reagent solution and reducing sugars are heated together, the solution changes its colour to orange-red/ brick red.