Question

a saturated picric acid solution incoid water used for the detection of alkaloids is known as ... options - 1.wagner's reagent 2.hager's reagent 3.dragendorff regents 4.mayer's reagent​

Answer 1

Answer:

A saturated picric acid solution incoid water used for the detection of alkaloids is known as -

4.mayer's reagent​

Explanation:

• This test was invented in (1814-1878) by the German chemist Julius Robert Von Mayer.
• Mayer's reagent is an alkaloid precipitation reagent for the detection of alkaloids in natural products.
• Mayer's reagent is freshly prepared by dissolving a mixture of mercuric chloride (1.36 g) and potassium iodide (5.00 g) in water (100 mL).
• In the Mayer test, a complex is formed between the alkaloid and the Mayer reagent.
• The nitrogen atom having a lone pair of electrons in the alkaloid forms a coordinate covalent bond with the potassium metal ion of Mayer's reagent, also known as potassium tetraiodomercurate.
• Most alkaloids are precipitated from neutral or slightly acidic solution by Mayer's reagent (potassium mercuric iodide solution) to give an off-white precipitate.

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