Saved Bookmarks
| 1. |
Question : How is plaster of paris prepared? |
|
Answer» Solution :Plaster of paris is prepared by heating GYPSUM to a temperature of `100 ^(@) C`. The following REACTION takes place: `CaSO_(4). 2H_(2)O to CaSO_(4). (1)/(2) H_(2)+ 1(1)/(2)H_(2)` On mixing with water it retracts to a hard mass to form gypsum again i.e., the reverse reaction takes place. B) * Bases possess a bitter taste * Bases are slippery to touch. *Bases turn red litmus blue Bases turn phenolpthalein solution pink *Strong base LIKE caustic soda (NaoH) caustic POTASH (KOH) are corrosive in nature and produce burning sensation on the skin *Solution of bases in water conduct electricity *Bases react with acid, neutralise them. *Producing salt and water. |
|