MCQ
Fluorescein is an example of
- Aazo dyes
- ✓phthalein dyes
- Ctriphenylmethane dyes
- Dnitro dyes
✓
Answer
Correct option: B.
phthalein dyes
b
Fluorescein also called resorcinolphthalein is an example of phthalein dye. It is prepared by heating phthalic anhydride and resorcinol over a zinc catalyst, and it crystallizes as a deep red powder.
Fluorescein also called resorcinolphthalein is an example of phthalein dye. It is prepared by heating phthalic anhydride and resorcinol over a zinc catalyst, and it crystallizes as a deep red powder.
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