MCQOPTIONS
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| 1. |
In clay content determination of molding sand, which is the base solution used? |
| A. | KOH |
| B. | NaOH |
| C. | Mg(OH)<sub>2</sub> |
| D. | Ca(OH)<sub>2</sub> |
| Answer» C. Mg(OH)<sub>2</sub> | |