Asked by: Jounaida Ayat
asked in category: General Last Updated: 15th February, 2020

What does Benedict's solution positive test look like?

A positive test with Benedict's reagent is shown by a color change from clear blue to brick-red with a precipitate. Generally, Benedict's test detects the presence of aldehydes, alpha-hydroxy-ketones, and hemiacetals, including those that occur in certain ketoses.

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Similarly one may ask, what does a positive Benedict's test look like?

Interpreting Benedict's Reagent Results In general, blue to blue-green or yellow-green is negative, yellowish to bright yellow is a moderate positive, and bright orange is a very strong positive.

Beside above, what does a positive lugol test look like? Left to right: Lugol's iodine (LI), starch solution, starch solution + LI. RESULTS: Yellow-orange = negative. Purple-black = positive. It demonstrates a negative test result (no protein present).

Likewise, people ask, what reagent tests for starches and what does a positive test look like?

The test involves heating a solution of the sugar to be tested with Benedict's reagent and observing the colour change of blue to orange. Benedict's reagent will give a positive test result for glucose but not for starch.

What color is Benedict's solution?

Benedict's solution is used to test for simple sugars, such as glucose. It is a clear blue solution of sodium and copper salts. In the presence of simple sugars, the blue solution changes color to green, yellow, and brick-red, depending on the amount of sugar.

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