Explain Procedure for Checking the Presence of Rhodamine B?
Conduct the experiment following the procedure given herewith:
1. Pour liquid paraffin or mineral oil in a Petri dish.
2. Soak the cotton swab in it.
3. Rub the swab on the surface of a red chilli and observe it for a red colour.
4. Red colour on cotton is a positive test.
5. For chilli powder, shake small quantity (1 tea spoon) of it with paraffin oil. Keep it for 15 minutes with intermittent shakings. Check the colour.