Four statements about hydrogen fuel cells are given. 1 The fuel cell changes chemical energy into electrical energy. 2 Within the fuel cell, hydrogen reacts with oxygen. 3 Carbon dioxide and water are formed in the fuel cell. 4 The hydrogen fuel is taken from the air. Which statements are correct?
- A1 and 2
- B1 and 4
- C2 and 3
- D2 and 4