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प्रश्न
Match the following:
| Column I | Column II | |
| 1. | Indirect dyes | Congo red |
| 2. | Direct dyes | Alizarin |
| 3. | Vat dyes | Methylene blue |
| 4. | Basic dyes | Picric acid |
| 5. | Acid dyes | Indigo |
जोड़ियाँ मिलाइएँ
उत्तर
| Column I | Answer | |
| 1. | Indirect dyes | Alizarin |
| 2. | Direct dyes | Congo red |
| 3. | Vat dyes | Indigo |
| 4. | Basic dyes | Methylene blue |
| 5. | Acid dyes | Picric acid |
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Dye Chemistry
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