MCQOPTIONS
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| 1. |
What is the basic combination of acids used in Hydrofluoric acid treatment? |
| A. | 13% HF + 12% HCl |
| B. | 13% HF + 12% HCl |
| C. | 12% HF + 3% HCl |
| D. | 3% HF + 12% HCl |
| Answer» E. | |