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1. |
The gas evolved on heating \[Ca{{F}_{2}}\] and \[Si{{O}_{2}}\]with concentrated \[{{H}_{2}}S{{O}_{4}}\] on hydrolysis gives a white gelatinous precipitate. The precipitate is: |
A. | hydrofluosilicic acid |
B. | silica gel |
C. | silicic acid |
D. | calciumfluorosilicate |
Answer» E. | |