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1. |
The chemical composition of Alum is _____________ |
A. | Al2 (SO4)3.18H2O |
B. | Al2 (SO4)2.18H2O |
C. | Al3 (SO4)2.18H2O |
D. | Al4 (SO4)3.18H2O |
Answer» B. Al2 (SO4)2.18H2O | |