Exams › JEE Main › Chemistry

Which of the following compound is added to the sodium extract before addition of silver nitrate for testing of halogens?

1. Nitric acid
2. Ammonia
3. Hydrochloric acid
4. Sodium hydroxide

Correct answer: Nitric acid

Solution

Before adding silver nitrate in the halogen test, the sodium (Lassaigne) extract is boiled with dilute nitric acid to decompose any NaCN/Na2S that would otherwise give false precipitates. The added compound is nitric acid.

Related JEE Main Chemistry questions

• Why is the chlorine atom in vinyl chloride comparatively less reactive?
• What is the product obtained when neopentyl bromide undergoes the Wurtz reaction?
• Which of the following reactions is most likely to produce a hydrocarbon in high yield with ease?
• Which of the following reactions proceeds by an S_N2 mechanism?
• Identify the incorrect statement among the following:
• When chloroform is exposed to air and sunlight by keeping it open, what product is formed?

⚔️ Practice JEE Main Chemistry free + battle 1v1 →