

MCQOPTIONS
Saved Bookmarks
1. |
Which gas is released when alum is added to water? |
A. | Al (OH)<sub>3</sub> |
B. | CaSO<sub>4</sub> |
C. | CO<sub>2</sub> |
D. | Ca (OH)<sub>3</sub> |
Answer» D. Ca (OH)<sub>3</sub> | |