9A (This is the process of converting electric energy into heat energy, not a chemical reaction, but a physical change)

10D (when the copper sheet is heated with hot water, the temperature of the copper sheet increases gradually, and the white phosphorus burns first, indicating that the ignition point is low).

11a (combustible combustion in b requires oxygen, fire extinguishing with water in c will damage books, and alcohol in d cannot be doused with water).

Make sure it is correct.