Biuret reagent original colour before reaction is?

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Multiple Choice

Biuret reagent original colour before reaction is?

Explanation:
The Biuret test uses copper(II) ions in a strongly basic solution, and that combination gives the reagent a blue colour by itself. When peptide bonds are present, the copper forms a violet complex with the peptide bonds, causing a colour change. So before any reaction with a protein, the reagent is blue.

The Biuret test uses copper(II) ions in a strongly basic solution, and that combination gives the reagent a blue colour by itself. When peptide bonds are present, the copper forms a violet complex with the peptide bonds, causing a colour change. So before any reaction with a protein, the reagent is blue.

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