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Which Test Would Show Positive Results For Orange Juice

Is Orange Juice positive for Benedict Test?

Fructose was used as a control for these tests because it is the most common sugar found in fruits (Hay, 1998). Grapefruits, limes, and oranges yielded a positive result (contained reducing sugars

reducing sugars
A reducing sugar is one that reduces another compound and is itself oxidized; that is, the carbonyl carbon of the sugar is oxidized to a carboxyl group. A sugar is classified as a reducing sugar only if it has an open-chain form with an aldehyde group or a free hemiacetal group.
https://en.wikipedia.org › wiki › Reducing_sugar

), while lemons showed a negative result in the Benedict's Test.

Which of the following would test positive in the biuret test and negative in the Sudan Red test?

Answer and Explanation: Skim milk would test positive on the Biuret test and negative in the Sudan Red test.

Is lugol orange juice?

Answer and Explanation: Orange juice contains various vitamins, such as vitamin C. The test that shows positive results for orange juice is Lugol's test.

Is orange positive in Benedict’s test?

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.

What gives positive Benedict test?

It can be noted that Benedict's test can also be used to check for the presence of glucose in a urine sample. Since this test detects any aldehydes and α-hydroxy ketones and glucose is an aldose whose open-chain forms an aldehyde group, the test yields a positive result when glucose is present in the analyte.

What does orange mean in Benedict test?

If it changes to orange, then it means that 1 to 1.5 percent sugar is present. If color changes to red,then 1.5 to 2.0 percent sugar is present. And if color changes to brick red,it means that more than 2 percent sugar is present in solution.

Which sugars give positive Benedict test?

It can be noted that Benedict's test can also be used to check for the presence of glucose in a urine sample. Since this test detects any aldehydes and α-hydroxy ketones and glucose is an aldose whose open-chain forms an aldehyde group, the test yields a positive result when glucose is present in the analyte.

What would test positive in a biuret test?

Egg albumin plus Biuret's reagent is a positive control for the protein test. It demonstrates a positive test result (protein is present).

What does a positive and negative biuret test look like?

RESULTS: Yellow-orange = negative. Purple-black = positive. Left to right: Biuret's reagent (BrR), water + BrR, egg albumin solution, egg albumin solution+ BrR.

Which will give a positive color with biuret test?

a deep blue/purple color due to the copper ion complex with the amide group of the protein.

What is the negative test for biuret?

A negative result (lack of violet colour formation) may mean lack of protein, or the presence of free amino acids (without peptide bonds). The test, however, gives positive result to any compound containing two carbonyl groups attached to a nitrogen or carbon atom.

What happens when iodine is added to orange juice?

When iodine is added to the orange juice, the some of the ascorbic acid is used up reducing it to iodide ion. When the hydrogen peroxide is added to the solution a slow reaction occurs in which the hydrogen peroxide oxidizes the iodide ion to triiodide ion (I3-).

Is Orange Juice positive for Benedict test?

Fructose was used as a control for these tests because it is the most common sugar found in fruits (Hay, 1998). Grapefruits, limes, and oranges yielded a positive result (contained reducing sugars

reducing sugars
A reducing sugar is one that reduces another compound and is itself oxidized; that is, the carbonyl carbon of the sugar is oxidized to a carboxyl group. A sugar is classified as a reducing sugar only if it has an open-chain form with an aldehyde group or a free hemiacetal group.
https://en.wikipedia.org › wiki › Reducing_sugar

), while lemons showed a negative result in the Benedict's Test.

What does lugol test for?

Lugol's iodine test is a commonly used diagnostic tool when colposcopically assessing the cervix in order to identify cervical dysplasia [10,13,22].

What color indicates a negative biuret test?

RESULTS: Denim-blue = negative. Lavender = positive. Water plus Biuret's reagent is a negative control for the protein test. It demonstrates a negative test result (no protein present).

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Funny and Friendly. Got a lot of time to cook and do experiment in cooking. Also Health-conscious try different types of juice for a healthy life.
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