Single Choice

Urea can be distinguished from acetamide using

ANaOH solution
BBiuret test
Correct Answer
CTollen's reagent
DFehling's solution

Solution

A biochemical test to detect proteins in solution, named after the substance biuret ($$H_2NCONHCONH_2$$), which is formed when urea is heated. A positive result is indicated by a violet ring, caused by the reaction of peptide bonds in the proteins or peptides. Such a result will not occur in the presence of free amino acids. Hence option (B) is correct.

SIMILAR QUESTIONS

Organic Compounds Containing Nitrogen

Urea reacts with water to form $$A$$ which will decompose to form $$B$$. $$B$$ when passed through $$Cu^{2+} (aq)$$, deep blue colour solution $$C$$ is formed. What is the formula of $$C$$ from the following?

Organic Compounds Containing Nitrogen

Urea on slow heating gives

Organic Compounds Containing Nitrogen

An aqueous solution of urea :

Organic Compounds Containing Nitrogen

A concentrated solution of urea gives a white precipitate with:

Organic Compounds Containing Nitrogen

Urea reacts with hydrazine to give.

Organic Compounds Containing Nitrogen

Urea reacts with malonic ester to give:

Organic Compounds Containing Nitrogen

Urea on treatment with sodium hypobromite gives:

Organic Compounds Containing Nitrogen

Urea on hydrolysis gives:

Organic Compounds Containing Nitrogen

What happens when? (i) Urea is heated with acetoacetic ester, (ii) Urea is heated with succinic acid, (iii)Urea is treated with sodium hypobromide in alkaline medium (iv) Urea is treated with acetyl chloride

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