Question

Liberman nitrate prikchan deta hai

Answer 1

Explanation:

The Liebermann reagent named after Hungarian chemist Leo Liebermann (1852-1926) is used as a simple spot-test to presumptively identify alkaloids as well as other compounds. It is composed of a mixture of potassium nitrite and concentrated sulfuric acid. 1g of potassium nitrite is used for every 10 mL of sulfuric acid.

Answer 2

In Liebermanns nitroso reaction, phenol is treated with sodium nitrite in presence of concentrated sulphuric acid and heated gently to obtain a blue colour.

It is then diluted with water to obtain red solution. On basification, with dil. NaOH solution, it turns blue.

Thus, the colour change is brown or red-greenish red-deep blue.