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| Q. |
At PH=10, the metal dye complex has the colour |
| A. | wine red |
| B. | blue |
| C. | green |
| D. | pink |
| Answer» A. wine red | |
| Explanation: at the ph=10, the metal dye complex ion has the colour is wine red but the dye itself has the blue colour at the ph of 10. | |
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